diff --git a/runtime/doc/autocmd.txt b/runtime/doc/autocmd.txt
index c826695..c922df1 100644
--- a/runtime/doc/autocmd.txt
+++ b/runtime/doc/autocmd.txt
@@ -1,4 +1,4 @@
-*autocmd.txt*   For Vim version 8.1.  Last change: 2019 Jun 02
+*autocmd.txt*   For Vim version 8.1.  Last change: 2019 Jun 15
 
 
 		  VIM REFERENCE MANUAL    by Bram Moolenaar
@@ -873,15 +873,33 @@
 							*OptionSet*
 OptionSet			After setting an option.  The pattern is
 				matched against the long option name.
-				The |v:option_old| variable indicates the
-				old option value, |v:option_new| variable
-				indicates the newly set value, the
-				|v:option_type| variable indicates whether
-				it's global or local scoped and |<amatch>|
-				indicates what option has been set.
+				|<amatch>| indicates what option has been set.
 
-				Is not triggered on startup and for the 'key'
-				option for obvious reasons.
+				|v:option_type| indicates whether it's global
+				or local scoped
+				|v:option_command| indicates what type of
+				set/let command was used (follow the tag to
+				see the table).
+				|v:option_new| indicates the newly set value.
+				|v:option_oldlocal| hass the old local value.
+				|v:option_oldglobal| hass the old global
+				value
+				|v:option_old| indicates the old option value.
+
+				|v:option_oldlocal| is only set when |:set|
+				or |:setlocal| or a |modeline| was used to set
+				the option. Similarly |v:option_oldglobal| is
+				only set when |:set| or |:setglobal| was used.
+
+				Note that when setting a |global-local| string
+				option with |:set|, then |v:option_old| is the
+				old global value. However, for all other kinds
+				of options (local string options, global-local
+				number options, ...) it is the old local
+				value.
+
+				OptionSet is not triggered on startup and for
+				the 'key' option for obvious reasons.
 
 				Usage example: Check for the existence of the
 				directory in the 'backupdir' and 'undodir'
diff --git a/runtime/doc/eval.txt b/runtime/doc/eval.txt
index ca3f4ca..83a8995 100644
--- a/runtime/doc/eval.txt
+++ b/runtime/doc/eval.txt
@@ -1943,10 +1943,29 @@
 		autocommand.
 						    *v:option_old*
 v:option_old    Old value of the option. Valid while executing an |OptionSet|
-		autocommand.
+		autocommand. Depending on the command used for setting and the
+		kind of option this is either the local old value or the
+		global old value.
+						    *v:option_oldlocal*
+v:option_oldlocal
+		Old local value of the option. Valid while executing an
+		|OptionSet| autocommand.
+						    *v:option_oldglobal*
+v:option_oldglobal
+		Old global value of the option. Valid while executing an
+		|OptionSet| autocommand.
 						    *v:option_type*
 v:option_type   Scope of the set command. Valid while executing an
 		|OptionSet| autocommand. Can be either "global" or "local"
+						    *v:option_command*
+v:option_command
+		Command used to set the option. Valid while executing an
+		|OptionSet| autocommand.
+			value		option was set via   ~
+			"setlocal"	|:setlocal| or ":let l:xxx"
+			"setglobal"	|:setglobal| or ":let g:xxx"
+			"set"		|:set| or |:let|
+			"modeline"	|modeline|
 					*v:operator* *operator-variable*
 v:operator	The last operator given in Normal mode.  This is a single
 		character except for commands starting with <g> or <z>,
diff --git a/runtime/doc/version8.txt b/runtime/doc/version8.txt
index 1dcef7e..73db5f0 100644
--- a/runtime/doc/version8.txt
+++ b/runtime/doc/version8.txt
@@ -336,7 +336,10 @@
 |v:null|		an empty String, used for JSON
 |v:option_new|    	new value of the option, used by |OptionSet|
 |v:option_old|    	old value of the option, used by |OptionSet|
+|v:option_oldlocal|	old local value of the option, used by |OptionSet|
+|v:option_oldglobal|	old global value of the option, used by |OptionSet|
 |v:option_type|   	scope of the set command, used by |OptionSet|
+|v:option_command|	command used to set the option, used by |OptionSet|
 |v:progpath|		the command with which Vim was invoked
 |v:t_bool|		value of Boolean type
 |v:t_channel|		value of Channel type
diff --git a/src/eval.c b/src/eval.c
index cdaf103..43866e6 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -172,6 +172,9 @@
     {VV_NAME("completed_item",	 VAR_DICT), VV_RO},
     {VV_NAME("option_new",	 VAR_STRING), VV_RO},
     {VV_NAME("option_old",	 VAR_STRING), VV_RO},
+    {VV_NAME("option_oldlocal",	 VAR_STRING), VV_RO},
+    {VV_NAME("option_oldglobal", VAR_STRING), VV_RO},
+    {VV_NAME("option_command",	 VAR_STRING), VV_RO},
     {VV_NAME("option_type",	 VAR_STRING), VV_RO},
     {VV_NAME("errors",		 VAR_LIST), 0},
     {VV_NAME("false",		 VAR_SPECIAL), VV_RO},
@@ -337,7 +340,7 @@
     for (i = 0; i < VV_LEN; ++i)
     {
 	p = &vimvars[i];
-	if (STRLEN(p->vv_name) > 16)
+	if (STRLEN(p->vv_name) > DICTITEM16_KEY_LEN)
 	{
 	    iemsg("INTERNAL: name too long, increase size of dictitem16_T");
 	    getout(1);
@@ -9500,14 +9503,18 @@
 }
 
 /*
- * Reset v:option_new, v:option_old and v:option_type.
+ * reset v:option_new, v:option_old, v:option_oldlocal, v:option_oldglobal,
+ * v:option_type, and v:option_command.
  */
     void
 reset_v_option_vars(void)
 {
     set_vim_var_string(VV_OPTION_NEW,  NULL, -1);
     set_vim_var_string(VV_OPTION_OLD,  NULL, -1);
+    set_vim_var_string(VV_OPTION_OLDLOCAL, NULL, -1);
+    set_vim_var_string(VV_OPTION_OLDGLOBAL, NULL, -1);
     set_vim_var_string(VV_OPTION_TYPE, NULL, -1);
+    set_vim_var_string(VV_OPTION_COMMAND, NULL, -1);
 }
 
 /*
diff --git a/src/option.c b/src/option.c
index 2d22c4c..12a0816 100644
--- a/src/option.c
+++ b/src/option.c
@@ -4336,12 +4336,25 @@
 #endif
 
 #if defined(FEAT_EVAL)
+/*
+ * Trigger the OptionSet autocommand.
+ * "opt_idx"	is the index of the option being set.
+ * "opt_flags"	can be OPT_LOCAL etc.
+ * "oldval"	the old value
+ *  "oldval_l"  the old local value (only non-NULL if global and local value
+ *		are set)
+ * "oldval_g"   the old global value (only non-NULL if global and local value
+ *		are set)
+ * "newval"	the new value
+ */
     static void
 trigger_optionsset_string(
 	int	opt_idx,
 	int	opt_flags,
-	char_u *oldval,
-	char_u *newval)
+	char_u  *oldval,
+	char_u  *oldval_l,
+	char_u  *oldval_g,
+	char_u  *newval)
 {
     // Don't do this recursively.
     if (oldval != NULL && newval != NULL
@@ -4354,6 +4367,27 @@
 	set_vim_var_string(VV_OPTION_OLD, oldval, -1);
 	set_vim_var_string(VV_OPTION_NEW, newval, -1);
 	set_vim_var_string(VV_OPTION_TYPE, buf_type, -1);
+	if (opt_flags & OPT_LOCAL)
+	{
+	    set_vim_var_string(VV_OPTION_COMMAND, (char_u *)"setlocal", -1);
+	    set_vim_var_string(VV_OPTION_OLDLOCAL, oldval, -1);
+	}
+	if (opt_flags & OPT_GLOBAL)
+	{
+	    set_vim_var_string(VV_OPTION_COMMAND, (char_u *)"setglobal", -1);
+	    set_vim_var_string(VV_OPTION_OLDGLOBAL, oldval, -1);
+	}
+	if ((opt_flags & (OPT_LOCAL | OPT_GLOBAL)) == 0)
+	{
+	    set_vim_var_string(VV_OPTION_COMMAND, (char_u *)"set", -1);
+	    set_vim_var_string(VV_OPTION_OLDLOCAL, oldval_l, -1);
+	    set_vim_var_string(VV_OPTION_OLDGLOBAL, oldval_g, -1);
+	}
+	if (opt_flags & OPT_MODELINE)
+	{
+	    set_vim_var_string(VV_OPTION_COMMAND, (char_u *)"modeline", -1);
+	    set_vim_var_string(VV_OPTION_OLDLOCAL, oldval, -1);
+	}
 	apply_autocmds(EVENT_OPTIONSET,
 		       (char_u *)options[opt_idx].fullname, NULL, FALSE, NULL);
 	reset_v_option_vars();
@@ -4836,8 +4870,12 @@
 			char_u	  *oldval = NULL; /* previous value if *varp */
 			char_u	  *newval;
 			char_u	  *origval = NULL;
+			char_u	  *origval_l = NULL;
+			char_u	  *origval_g = NULL;
 #if defined(FEAT_EVAL)
 			char_u	  *saved_origval = NULL;
+			char_u	  *saved_origval_l = NULL;
+			char_u	  *saved_origval_g = NULL;
 			char_u	  *saved_newval = NULL;
 #endif
 			unsigned  newlen;
@@ -4857,8 +4895,23 @@
 			 * new value is valid. */
 			oldval = *(char_u **)varp;
 
-			/* When setting the local value of a global
-			 * option, the old value may be the global value. */
+			if ((opt_flags & (OPT_LOCAL | OPT_GLOBAL)) == 0)
+			{
+			    origval_l = *(char_u **)get_varp_scope(
+					       &(options[opt_idx]), OPT_LOCAL);
+			    origval_g = *(char_u **)get_varp_scope(
+					      &(options[opt_idx]), OPT_GLOBAL);
+
+			    // A global-local string option might have an empty
+			    // option as value to indicate that the global
+			    // value should be used.
+			    if (((int)options[opt_idx].indir & PV_BOTH)
+						  && origval_l == empty_option)
+				origval_l = origval_g;
+			}
+
+			// When setting the local value of a global
+			// option, the old value may be the global value.
 			if (((int)options[opt_idx].indir & PV_BOTH)
 					       && (opt_flags & OPT_LOCAL))
 			    origval = *(char_u **)get_varp(
@@ -4944,6 +4997,10 @@
 				vim_free(oldval);
 				if (origval == oldval)
 				    origval = *(char_u **)varp;
+				if (origval_l == oldval)
+				    origval_l = *(char_u **)varp;
+				if (origval_g == oldval)
+				    origval_g = *(char_u **)varp;
 				oldval = *(char_u **)varp;
 			    }
 			    /*
@@ -5201,6 +5258,10 @@
 			    /* newval (and varp) may become invalid if the
 			     * buffer is closed by autocommands. */
 			    saved_newval = vim_strsave(newval);
+			    if (origval_l != NULL)
+				saved_origval_l = vim_strsave(origval_l);
+			    if (origval_g != NULL)
+				saved_origval_g = vim_strsave(origval_g);
 			}
 #endif
 
@@ -5234,9 +5295,13 @@
 
 #if defined(FEAT_EVAL)
 			if (errmsg == NULL)
-			    trigger_optionsset_string(opt_idx, opt_flags,
-						  saved_origval, saved_newval);
+			    trigger_optionsset_string(
+				    opt_idx, opt_flags, saved_origval,
+				    saved_origval_l, saved_origval_g,
+				    saved_newval);
 			vim_free(saved_origval);
+			vim_free(saved_origval_l);
+			vim_free(saved_origval_g);
 			vim_free(saved_newval);
 #endif
 			/* If error detected, print the error message. */
@@ -6070,8 +6135,12 @@
     char_u	*s;
     char_u	**varp;
     char_u	*oldval;
+    char_u	*oldval_l = NULL;
+    char_u	*oldval_g = NULL;
 #if defined(FEAT_EVAL)
     char_u	*saved_oldval = NULL;
+    char_u	*saved_oldval_l = NULL;
+    char_u	*saved_oldval_g = NULL;
     char_u	*saved_newval = NULL;
 #endif
     char	*r = NULL;
@@ -6089,6 +6158,13 @@
 			? OPT_GLOBAL : OPT_LOCAL)
 		    : opt_flags);
 	oldval = *varp;
+	if ((opt_flags & (OPT_LOCAL | OPT_GLOBAL)) == 0)
+	{
+	    oldval_l = *(char_u **)get_varp_scope(&(options[opt_idx]),
+								    OPT_LOCAL);
+	    oldval_g = *(char_u **)get_varp_scope(&(options[opt_idx]),
+								   OPT_GLOBAL);
+	}
 	*varp = s;
 
 #if defined(FEAT_EVAL)
@@ -6098,6 +6174,10 @@
 # endif
 		)
 	{
+	    if (oldval_l != NULL)
+		saved_oldval_l = vim_strsave(oldval_l);
+	    if (oldval_g != NULL)
+		saved_oldval_g = vim_strsave(oldval_g);
 	    saved_oldval = vim_strsave(oldval);
 	    saved_newval = vim_strsave(s);
 	}
@@ -6110,8 +6190,11 @@
 	/* call autocommand after handling side effects */
 	if (r == NULL)
 	    trigger_optionsset_string(opt_idx, opt_flags,
-						   saved_oldval, saved_newval);
+				   saved_oldval, saved_oldval_l,
+				   saved_oldval_g, saved_newval);
 	vim_free(saved_oldval);
+	vim_free(saved_oldval_l);
+	vim_free(saved_oldval_g);
 	vim_free(saved_newval);
 #endif
     }
@@ -8442,6 +8525,7 @@
     int		opt_flags)		/* OPT_LOCAL and/or OPT_GLOBAL */
 {
     int		old_value = *(int *)varp;
+    int		old_global_value = 0;
 
     /* Disallow changing some options from secure mode */
     if ((secure
@@ -8451,6 +8535,13 @@
 		) && (options[opt_idx].flags & P_SECURE))
 	return e_secure;
 
+    // Save the global value before changing anything. This is needed as for
+    // a global-only option setting the "local value" in fact sets the global
+    // value (since there is only one value).
+    if ((opt_flags & (OPT_LOCAL | OPT_GLOBAL)) == 0)
+	old_global_value = *(int *)get_varp_scope(&(options[opt_idx]),
+								   OPT_GLOBAL);
+
     *(int *)varp = value;	    /* set the new value */
 #ifdef FEAT_EVAL
     /* Remember where the option was set. */
@@ -8976,15 +9067,40 @@
     // Don't do this while starting up or recursively.
     if (!starting && *get_vim_var_str(VV_OPTION_TYPE) == NUL)
     {
-	char_u buf_old[2], buf_new[2], buf_type[7];
+	char_u buf_old[2], buf_old_global[2], buf_new[2], buf_type[7];
 
 	vim_snprintf((char *)buf_old, 2, "%d", old_value ? TRUE: FALSE);
+	vim_snprintf((char *)buf_old_global, 2, "%d",
+					       old_global_value ? TRUE: FALSE);
 	vim_snprintf((char *)buf_new, 2, "%d", value ? TRUE: FALSE);
-	vim_snprintf((char *)buf_type, 7, "%s", (opt_flags & OPT_LOCAL) ? "local" : "global");
+	vim_snprintf((char *)buf_type, 7, "%s",
+				 (opt_flags & OPT_LOCAL) ? "local" : "global");
 	set_vim_var_string(VV_OPTION_NEW, buf_new, -1);
 	set_vim_var_string(VV_OPTION_OLD, buf_old, -1);
 	set_vim_var_string(VV_OPTION_TYPE, buf_type, -1);
-	apply_autocmds(EVENT_OPTIONSET, (char_u *) options[opt_idx].fullname, NULL, FALSE, NULL);
+	if (opt_flags & OPT_LOCAL)
+	{
+	    set_vim_var_string(VV_OPTION_COMMAND, (char_u *)"setlocal", -1);
+	    set_vim_var_string(VV_OPTION_OLDLOCAL, buf_old, -1);
+	}
+	if (opt_flags & OPT_GLOBAL)
+	{
+	    set_vim_var_string(VV_OPTION_COMMAND, (char_u *)"setglobal", -1);
+	    set_vim_var_string(VV_OPTION_OLDGLOBAL, buf_old, -1);
+	}
+	if ((opt_flags & (OPT_LOCAL | OPT_GLOBAL)) == 0)
+	{
+	    set_vim_var_string(VV_OPTION_COMMAND, (char_u *)"set", -1);
+	    set_vim_var_string(VV_OPTION_OLDLOCAL, buf_old, -1);
+	    set_vim_var_string(VV_OPTION_OLDGLOBAL, buf_old_global, -1);
+	}
+	if (opt_flags & OPT_MODELINE)
+	{
+	    set_vim_var_string(VV_OPTION_COMMAND, (char_u *)"modeline", -1);
+	    set_vim_var_string(VV_OPTION_OLDLOCAL, buf_old, -1);
+	}
+	apply_autocmds(EVENT_OPTIONSET, (char_u *)options[opt_idx].fullname,
+							    NULL, FALSE, NULL);
 	reset_v_option_vars();
     }
 #endif
@@ -9014,8 +9130,10 @@
 {
     char	*errmsg = NULL;
     long	old_value = *(long *)varp;
-    long	old_Rows = Rows;	/* remember old Rows */
-    long	old_Columns = Columns;	/* remember old Columns */
+    long	old_global_value = 0;	// only used when setting a local and
+					// global option
+    long	old_Rows = Rows;	// remember old Rows
+    long	old_Columns = Columns;	// remember old Columns
     long	*pp = (long *)varp;
 
     /* Disallow changing some options from secure mode. */
@@ -9026,6 +9144,12 @@
 		) && (options[opt_idx].flags & P_SECURE))
 	return e_secure;
 
+    // Save the global value before changing anything. This is needed as for
+    // a global-only option setting the "local value" infact sets the global
+    // value (since there is only one value).
+    if ((opt_flags & (OPT_LOCAL | OPT_GLOBAL)) == 0)
+	old_global_value = *(long *)get_varp_scope(&(options[opt_idx]), OPT_GLOBAL);
+
     *pp = value;
 #ifdef FEAT_EVAL
     /* Remember where the option was set. */
@@ -9533,15 +9657,37 @@
     // Don't do this while starting up, failure or recursively.
     if (!starting && errmsg == NULL && *get_vim_var_str(VV_OPTION_TYPE) == NUL)
     {
-	char_u buf_old[11], buf_new[11], buf_type[7];
-
+	char_u buf_old[11], buf_old_global[11], buf_new[11], buf_type[7];
 	vim_snprintf((char *)buf_old, 10, "%ld", old_value);
+	vim_snprintf((char *)buf_old_global, 10, "%ld", old_global_value);
 	vim_snprintf((char *)buf_new, 10, "%ld", value);
 	vim_snprintf((char *)buf_type, 7, "%s", (opt_flags & OPT_LOCAL) ? "local" : "global");
 	set_vim_var_string(VV_OPTION_NEW, buf_new, -1);
 	set_vim_var_string(VV_OPTION_OLD, buf_old, -1);
 	set_vim_var_string(VV_OPTION_TYPE, buf_type, -1);
-	apply_autocmds(EVENT_OPTIONSET, (char_u *) options[opt_idx].fullname, NULL, FALSE, NULL);
+	if (opt_flags & OPT_LOCAL)
+	{
+	    set_vim_var_string(VV_OPTION_COMMAND, (char_u *)"setlocal", -1);
+	    set_vim_var_string(VV_OPTION_OLDLOCAL, buf_old, -1);
+	}
+	if (opt_flags & OPT_GLOBAL)
+	{
+	    set_vim_var_string(VV_OPTION_COMMAND, (char_u *)"setglobal", -1);
+	    set_vim_var_string(VV_OPTION_OLDGLOBAL, buf_old, -1);
+	}
+	if ((opt_flags & (OPT_LOCAL | OPT_GLOBAL)) == 0)
+	{
+	    set_vim_var_string(VV_OPTION_COMMAND, (char_u *)"set", -1);
+	    set_vim_var_string(VV_OPTION_OLDLOCAL, buf_old, -1);
+	    set_vim_var_string(VV_OPTION_OLDGLOBAL, buf_old_global, -1);
+	}
+	if (opt_flags & OPT_MODELINE)
+	{
+	    set_vim_var_string(VV_OPTION_COMMAND, (char_u *)"modeline", -1);
+	    set_vim_var_string(VV_OPTION_OLDLOCAL, buf_old, -1);
+	}
+	apply_autocmds(EVENT_OPTIONSET, (char_u *)options[opt_idx].fullname,
+							    NULL, FALSE, NULL);
 	reset_v_option_vars();
     }
 #endif
diff --git a/src/structs.h b/src/structs.h
index 04e21a1..5925927 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -1369,12 +1369,16 @@
 };
 typedef struct dictitem_S dictitem_T;
 
-/* A dictitem with a 16 character key (plus NUL). */
+/*
+ * A dictitem with a 16 character key (plus NUL).  This is an efficient way to
+ * have a fixed-size dictitem.
+ */
+#define DICTITEM16_KEY_LEN 16
 struct dictitem16_S
 {
     typval_T	di_tv;		/* type and value of the variable */
     char_u	di_flags;	/* flags (only used for variable) */
-    char_u	di_key[17];	/* key */
+    char_u	di_key[DICTITEM16_KEY_LEN + 1];	/* key */
 };
 typedef struct dictitem16_S dictitem16_T;
 
diff --git a/src/testdir/test_autocmd.vim b/src/testdir/test_autocmd.vim
index 0a4177c..3254db8 100644
--- a/src/testdir/test_autocmd.vim
+++ b/src/testdir/test_autocmd.vim
@@ -495,9 +495,10 @@
 endfunc
 
 func s:AutoCommandOptionSet(match)
+  let template = "Option: <%s>, OldVal: <%s>, OldValLocal: <%s>, OldValGlobal: <%s>, NewVal: <%s>, Scope: <%s>, Command: <%s>\n"
   let item     = remove(g:options, 0)
-  let expected = printf("Option: <%s>, Oldval: <%s>, NewVal: <%s>, Scope: <%s>\n", item[0], item[1], item[2], item[3])
-  let actual   = printf("Option: <%s>, Oldval: <%s>, NewVal: <%s>, Scope: <%s>\n", a:match, v:option_old, v:option_new, v:option_type)
+  let expected = printf(template, item[0], item[1], item[2], item[3], item[4], item[5], item[6])
+  let actual   = printf(template, a:match, v:option_old, v:option_oldlocal, v:option_oldglobal, v:option_new, v:option_type, v:option_command)
   let g:opt    = [expected, actual]
   "call assert_equal(expected, actual)
 endfunc
@@ -514,92 +515,100 @@
   au OptionSet * :call s:AutoCommandOptionSet(expand("<amatch>"))
 
   " 1: Setting number option"
-  let g:options=[['number', 0, 1, 'global']]
+  let g:options=[['number', 0, 0, 0, 1, 'global', 'set']]
   set nu
   call assert_equal([], g:options)
   call assert_equal(g:opt[0], g:opt[1])
 
   " 2: Setting local number option"
-  let g:options=[['number', 1, 0, 'local']]
+  let g:options=[['number', 1, 1, '', 0, 'local', 'setlocal']]
   setlocal nonu
   call assert_equal([], g:options)
   call assert_equal(g:opt[0], g:opt[1])
 
   " 3: Setting global number option"
-  let g:options=[['number', 1, 0, 'global']]
+  let g:options=[['number', 1, '', 1, 0, 'global', 'setglobal']]
   setglobal nonu
   call assert_equal([], g:options)
   call assert_equal(g:opt[0], g:opt[1])
 
   " 4: Setting local autoindent option"
-  let g:options=[['autoindent', 0, 1, 'local']]
+  let g:options=[['autoindent', 0, 0, '', 1, 'local', 'setlocal']]
   setlocal ai
   call assert_equal([], g:options)
   call assert_equal(g:opt[0], g:opt[1])
 
   " 5: Setting global autoindent option"
-  let g:options=[['autoindent', 0, 1, 'global']]
+  let g:options=[['autoindent', 0, '', 0, 1, 'global', 'setglobal']]
   setglobal ai
   call assert_equal([], g:options)
   call assert_equal(g:opt[0], g:opt[1])
 
   " 6: Setting global autoindent option"
-  let g:options=[['autoindent', 1, 0, 'global']]
+  let g:options=[['autoindent', 1, 1, 1, 0, 'global', 'set']]
+  set ai!
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 6a: Setting global autoindent option"
+  let g:options=[['autoindent', 1, 1, 0, 0, 'global', 'set']]
+  noa setlocal ai
+  noa setglobal noai
   set ai!
   call assert_equal([], g:options)
   call assert_equal(g:opt[0], g:opt[1])
 
   " Should not print anything, use :noa
   " 7: don't trigger OptionSet"
-  let g:options=[['invalid', 1, 1, 'invalid']]
+  let g:options=[['invalid', 'invalid', 'invalid', 'invalid', 'invalid', 'invalid', 'invalid']]
   noa set nonu
-  call assert_equal([['invalid', 1, 1, 'invalid']], g:options)
+  call assert_equal([['invalid', 'invalid', 'invalid', 'invalid', 'invalid', 'invalid', 'invalid']], g:options)
   call assert_equal(g:opt[0], g:opt[1])
 
   " 8: Setting several global list and number option"
-  let g:options=[['list', 0, 1, 'global'], ['number', 0, 1, 'global']]
+  let g:options=[['list', 0, 0, 0, 1, 'global', 'set'], ['number', 0, 0, 0, 1, 'global', 'set']]
   set list nu
   call assert_equal([], g:options)
   call assert_equal(g:opt[0], g:opt[1])
 
   " 9: don't trigger OptionSet"
-  let g:options=[['invalid', 1, 1, 'invalid'], ['invalid', 1, 1, 'invalid']]
+  let g:options=[['invalid', 'invalid', 'invalid', 'invalid', 'invalid', 'invalid', 'invalid'], ['invalid', 'invalid', 'invalid', 'invalid', 'invalid', 'invalid', 'invalid']]
   noa set nolist nonu
-  call assert_equal([['invalid', 1, 1, 'invalid'], ['invalid', 1, 1, 'invalid']], g:options)
+  call assert_equal([['invalid', 'invalid', 'invalid', 'invalid', 'invalid', 'invalid', 'invalid'], ['invalid', 'invalid', 'invalid', 'invalid', 'invalid', 'invalid', 'invalid']], g:options)
   call assert_equal(g:opt[0], g:opt[1])
 
   " 10: Setting global acd"
-  let g:options=[['autochdir', 0, 1, 'local']]
+  let g:options=[['autochdir', 0, 0, '', 1, 'local', 'setlocal']]
   setlocal acd
   call assert_equal([], g:options)
   call assert_equal(g:opt[0], g:opt[1])
 
   " 11: Setting global autoread (also sets local value)"
-  let g:options=[['autoread', 0, 1, 'global']]
+  let g:options=[['autoread', 0, 0, 0, 1, 'global', 'set']]
   set ar
   call assert_equal([], g:options)
   call assert_equal(g:opt[0], g:opt[1])
 
   " 12: Setting local autoread"
-  let g:options=[['autoread', 1, 1, 'local']]
+  let g:options=[['autoread', 1, 1, '', 1, 'local', 'setlocal']]
   setlocal ar
   call assert_equal([], g:options)
   call assert_equal(g:opt[0], g:opt[1])
 
   " 13: Setting global autoread"
-  let g:options=[['autoread', 1, 0, 'global']]
+  let g:options=[['autoread', 1, '', 1, 0, 'global', 'setglobal']]
   setglobal invar
   call assert_equal([], g:options)
   call assert_equal(g:opt[0], g:opt[1])
 
   " 14: Setting option backspace through :let"
-  let g:options=[['backspace', '', 'eol,indent,start', 'global']]
+  let g:options=[['backspace', '', '', '', 'eol,indent,start', 'global', 'set']]
   let &bs="eol,indent,start"
   call assert_equal([], g:options)
   call assert_equal(g:opt[0], g:opt[1])
 
   " 15: Setting option backspace through setbufvar()"
-  let g:options=[['backup', 0, 1, 'local']]
+  let g:options=[['backup', 0, 0, '', 1, 'local', 'setlocal']]
   " try twice, first time, shouldn't trigger because option name is invalid,
   " second time, it should trigger
   let bnum = bufnr('%')
@@ -610,34 +619,488 @@
   call assert_equal(g:opt[0], g:opt[1])
 
   " 16: Setting number option using setwinvar"
-  let g:options=[['number', 0, 1, 'local']]
+  let g:options=[['number', 0, 0, '', 1, 'local', 'setlocal']]
   call setwinvar(0, '&number', 1)
   call assert_equal([], g:options)
   call assert_equal(g:opt[0], g:opt[1])
 
   " 17: Setting key option, shouldn't trigger"
-  let g:options=[['key', 'invalid', 'invalid1', 'invalid']]
+  let g:options=[['key', 'invalid', 'invalid1', 'invalid2', 'invalid3', 'invalid4', 'invalid5']]
   setlocal key=blah
   setlocal key=
-  call assert_equal([['key', 'invalid', 'invalid1', 'invalid']], g:options)
+  call assert_equal([['key', 'invalid', 'invalid1', 'invalid2', 'invalid3', 'invalid4', 'invalid5']], g:options)
   call assert_equal(g:opt[0], g:opt[1])
 
-  " 18: Setting string option"
+
+  " 18a: Setting string global option"
+  let oldval = &backupext
+  let g:options=[['backupext', oldval, oldval, oldval, 'foo', 'global', 'set']]
+  set backupext=foo
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 18b: Resetting string global option"
+  let g:options=[['backupext', 'foo', 'foo', 'foo', oldval, 'global', 'set']]
+  set backupext&
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 18c: Setting global string global option"
+  let g:options=[['backupext', oldval, '', oldval, 'bar', 'global', 'setglobal']]
+  setglobal backupext=bar
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 18d: Setting local string global option"
+  " As this is a global option this sets the global value even though
+  " :setlocal is used!
+  noa set backupext& " Reset global and local value (without triggering autocmd)
+  let g:options=[['backupext', oldval, oldval, '', 'baz', 'local', 'setlocal']]
+  setlocal backupext=baz
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 18e: Setting again string global option"
+  noa setglobal backupext=ext_global " Reset global and local value (without triggering autocmd)
+  noa setlocal backupext=ext_local " Sets the global(!) value!
+  let g:options=[['backupext', 'ext_local', 'ext_local', 'ext_local', 'fuu', 'global', 'set']]
+  set backupext=fuu
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+
+  " 19a: Setting string local-global (to buffer) option"
   let oldval = &tags
-  let g:options=[['tags', oldval, 'tagpath', 'global']]
+  let g:options=[['tags', oldval, oldval, oldval, 'tagpath', 'global', 'set']]
   set tags=tagpath
   call assert_equal([], g:options)
   call assert_equal(g:opt[0], g:opt[1])
 
-  " 1l: Resetting string option"
-  let g:options=[['tags', 'tagpath', oldval, 'global']]
+  " 19b: Resetting string local-global (to buffer) option"
+  let g:options=[['tags', 'tagpath', 'tagpath', 'tagpath', oldval, 'global', 'set']]
   set tags&
   call assert_equal([], g:options)
   call assert_equal(g:opt[0], g:opt[1])
 
+  " 19c: Setting global string local-global (to buffer) option "
+  let g:options=[['tags', oldval, '', oldval, 'tagpath1', 'global', 'setglobal']]
+  setglobal tags=tagpath1
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 19d: Setting local string local-global (to buffer) option"
+  let g:options=[['tags', 'tagpath1', 'tagpath1', '', 'tagpath2', 'local', 'setlocal']]
+  setlocal tags=tagpath2
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 19e: Setting again string local-global (to buffer) option"
+  " Note: v:option_old is the old global value for local-global string options
+  " but the old local value for all other kinds of options.
+  noa setglobal tags=tag_global " Reset global and local value (without triggering autocmd)
+  noa setlocal tags=tag_local
+  let g:options=[['tags', 'tag_global', 'tag_local', 'tag_global', 'tagpath', 'global', 'set']]
+  set tags=tagpath
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 19f: Setting string local-global (to buffer) option to an empty string"
+  " Note: v:option_old is the old global value for local-global string options
+  " but the old local value for all other kinds of options.
+  noa set tags=tag_global " Reset global and local value (without triggering autocmd)
+  noa setlocal tags= " empty string
+  let g:options=[['tags', 'tag_global', '', 'tag_global', 'tagpath', 'global', 'set']]
+  set tags=tagpath
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+
+  " 20a: Setting string local (to buffer) option"
+  let oldval = &spelllang
+  let g:options=[['spelllang', oldval, oldval, oldval, 'elvish,klingon', 'global', 'set']]
+  set spelllang=elvish,klingon
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 20b: Resetting string local (to buffer) option"
+  let g:options=[['spelllang', 'elvish,klingon', 'elvish,klingon', 'elvish,klingon', oldval, 'global', 'set']]
+  set spelllang&
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 20c: Setting global string local (to buffer) option"
+  let g:options=[['spelllang', oldval, '', oldval, 'elvish', 'global', 'setglobal']]
+  setglobal spelllang=elvish
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 20d: Setting local string local (to buffer) option"
+  noa set spelllang& " Reset global and local value (without triggering autocmd)
+  let g:options=[['spelllang', oldval, oldval, '', 'klingon', 'local', 'setlocal']]
+  setlocal spelllang=klingon
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 20e: Setting again string local (to buffer) option"
+  " Note: v:option_old is the old global value for local-global string options
+  " but the old local value for all other kinds of options.
+  noa setglobal spelllang=spellglobal " Reset global and local value (without triggering autocmd)
+  noa setlocal spelllang=spelllocal
+  let g:options=[['spelllang', 'spelllocal', 'spelllocal', 'spellglobal', 'foo', 'global', 'set']]
+  set spelllang=foo
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+
+  " 21a: Setting string local-global (to window) option"
+  let oldval = &statusline
+  let g:options=[['statusline', oldval, oldval, oldval, 'foo', 'global', 'set']]
+  set statusline=foo
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 21b: Resetting string local-global (to window) option"
+  " Note: v:option_old is the old global value for local-global string options
+  " but the old local value for all other kinds of options.
+  let g:options=[['statusline', 'foo', 'foo', 'foo', oldval, 'global', 'set']]
+  set statusline&
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 21c: Setting global string local-global (to window) option"
+  let g:options=[['statusline', oldval, '', oldval, 'bar', 'global', 'setglobal']]
+  setglobal statusline=bar
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 21d: Setting local string local-global (to window) option"
+  noa set statusline& " Reset global and local value (without triggering autocmd)
+  let g:options=[['statusline', oldval, oldval, '', 'baz', 'local', 'setlocal']]
+  setlocal statusline=baz
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 21e: Setting again string local-global (to window) option"
+  " Note: v:option_old is the old global value for local-global string options
+  " but the old local value for all other kinds of options.
+  noa setglobal statusline=bar " Reset global and local value (without triggering autocmd)
+  noa setlocal statusline=baz
+  let g:options=[['statusline', 'bar', 'baz', 'bar', 'foo', 'global', 'set']]
+  set statusline=foo
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+
+  " 22a: Setting string local (to window) option"
+  let oldval = &foldignore
+  let g:options=[['foldignore', oldval, oldval, oldval, 'fo', 'global', 'set']]
+  set foldignore=fo
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 22b: Resetting string local (to window) option"
+  let g:options=[['foldignore', 'fo', 'fo', 'fo', oldval, 'global', 'set']]
+  set foldignore&
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 22c: Setting global string local (to window) option"
+  let g:options=[['foldignore', oldval, '', oldval, 'bar', 'global', 'setglobal']]
+  setglobal foldignore=bar
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 22d: Setting local string local (to window) option"
+  noa set foldignore& " Reset global and local value (without triggering autocmd)
+  let g:options=[['foldignore', oldval, oldval, '', 'baz', 'local', 'setlocal']]
+  setlocal foldignore=baz
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 22e: Setting again string local (to window) option"
+  noa setglobal foldignore=glob " Reset global and local value (without triggering autocmd)
+  noa setlocal foldignore=loc
+  let g:options=[['foldignore', 'loc', 'loc', 'glob', 'fo', 'global', 'set']]
+  set foldignore=fo
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+
+  " 23a: Setting global number local option"
+  noa setglobal cmdheight=8 " Reset global and local value (without triggering autocmd)
+  noa setlocal cmdheight=1 " Sets the global(!) value!
+  let g:options=[['cmdheight', '1', '', '1', '2', 'global', 'setglobal']]
+  setglobal cmdheight=2
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 23b: Setting local number global option"
+  noa setglobal cmdheight=8 " Reset global and local value (without triggering autocmd)
+  noa setlocal cmdheight=1 " Sets the global(!) value!
+  let g:options=[['cmdheight', '1', '1', '', '2', 'local', 'setlocal']]
+  setlocal cmdheight=2
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 23c: Setting again number global option"
+  noa setglobal cmdheight=8 " Reset global and local value (without triggering autocmd)
+  noa setlocal cmdheight=1 " Sets the global(!) value!
+  let g:options=[['cmdheight', '1', '1', '1', '2', 'global', 'set']]
+  set cmdheight=2
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 23d: Setting again number global option"
+  noa set cmdheight=8 " Reset global and local value (without triggering autocmd)
+  let g:options=[['cmdheight', '8', '8', '8', '2', 'global', 'set']]
+  set cmdheight=2
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+
+  " 24a: Setting global number global-local (to buffer) option"
+  noa setglobal undolevels=8 " Reset global and local value (without triggering autocmd)
+  noa setlocal undolevels=1
+  let g:options=[['undolevels', '8', '', '8', '2', 'global', 'setglobal']]
+  setglobal undolevels=2
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 24b: Setting local number global-local (to buffer) option"
+  noa setglobal undolevels=8 " Reset global and local value (without triggering autocmd)
+  noa setlocal undolevels=1
+  let g:options=[['undolevels', '1', '1', '', '2', 'local', 'setlocal']]
+  setlocal undolevels=2
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 24c: Setting again number global-local (to buffer) option"
+  noa setglobal undolevels=8 " Reset global and local value (without triggering autocmd)
+  noa setlocal undolevels=1
+  let g:options=[['undolevels', '1', '1', '8', '2', 'global', 'set']]
+  set undolevels=2
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 24d: Setting again global number global-local (to buffer) option"
+  noa set undolevels=8 " Reset global and local value (without triggering autocmd)
+  let g:options=[['undolevels', '8', '8', '8', '2', 'global', 'set']]
+  set undolevels=2
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+
+  " 25a: Setting global number local (to buffer) option"
+  noa setglobal wrapmargin=8 " Reset global and local value (without triggering autocmd)
+  noa setlocal wrapmargin=1
+  let g:options=[['wrapmargin', '8', '', '8', '2', 'global', 'setglobal']]
+  setglobal wrapmargin=2
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 25b: Setting local number local (to buffer) option"
+  noa setglobal wrapmargin=8 " Reset global and local value (without triggering autocmd)
+  noa setlocal wrapmargin=1
+  let g:options=[['wrapmargin', '1', '1', '', '2', 'local', 'setlocal']]
+  setlocal wrapmargin=2
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 25c: Setting again number local (to buffer) option"
+  noa setglobal wrapmargin=8 " Reset global and local value (without triggering autocmd)
+  noa setlocal wrapmargin=1
+  let g:options=[['wrapmargin', '1', '1', '8', '2', 'global', 'set']]
+  set wrapmargin=2
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 25d: Setting again global number local (to buffer) option"
+  noa set wrapmargin=8 " Reset global and local value (without triggering autocmd)
+  let g:options=[['wrapmargin', '8', '8', '8', '2', 'global', 'set']]
+  set wrapmargin=2
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+
+  " 26: Setting number global-local (to window) option.
+  " Such option does currently not exist.
+
+
+  " 27a: Setting global number local (to window) option"
+  noa setglobal foldcolumn=8 " Reset global and local value (without triggering autocmd)
+  noa setlocal foldcolumn=1
+  let g:options=[['foldcolumn', '8', '', '8', '2', 'global', 'setglobal']]
+  setglobal foldcolumn=2
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 27b: Setting local number local (to window) option"
+  noa setglobal foldcolumn=8 " Reset global and local value (without triggering autocmd)
+  noa setlocal foldcolumn=1
+  let g:options=[['foldcolumn', '1', '1', '', '2', 'local', 'setlocal']]
+  setlocal foldcolumn=2
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 27c: Setting again number local (to window) option"
+  noa setglobal foldcolumn=8 " Reset global and local value (without triggering autocmd)
+  noa setlocal foldcolumn=1
+  let g:options=[['foldcolumn', '1', '1', '8', '2', 'global', 'set']]
+  set foldcolumn=2
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 27d: Ssettin again global number local (to window) option"
+  noa set foldcolumn=8 " Reset global and local value (without triggering autocmd)
+  let g:options=[['foldcolumn', '8', '8', '8', '2', 'global', 'set']]
+  set foldcolumn=2
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+
+  " 28a: Setting global boolean global option"
+  noa setglobal nowrapscan " Reset global and local value (without triggering autocmd)
+  noa setlocal wrapscan " Sets the global(!) value!
+  let g:options=[['wrapscan', '1', '', '1', '0', 'global', 'setglobal']]
+  setglobal nowrapscan
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 28b: Setting local boolean global option"
+  noa setglobal nowrapscan " Reset global and local value (without triggering autocmd)
+  noa setlocal wrapscan " Sets the global(!) value!
+  let g:options=[['wrapscan', '1', '1', '', '0', 'local', 'setlocal']]
+  setlocal nowrapscan
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 28c: Setting again boolean global option"
+  noa setglobal nowrapscan " Reset global and local value (without triggering autocmd)
+  noa setlocal wrapscan " Sets the global(!) value!
+  let g:options=[['wrapscan', '1', '1', '1', '0', 'global', 'set']]
+  set nowrapscan
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 28d: Setting again global boolean global option"
+  noa set nowrapscan " Reset global and local value (without triggering autocmd)
+  let g:options=[['wrapscan', '0', '0', '0', '1', 'global', 'set']]
+  set wrapscan
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+
+  " 29a: Setting global boolean global-local (to buffer) option"
+  noa setglobal noautoread " Reset global and local value (without triggering autocmd)
+  noa setlocal autoread
+  let g:options=[['autoread', '0', '', '0', '1', 'global', 'setglobal']]
+  setglobal autoread
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 29b: Setting local boolean global-local (to buffer) option"
+  noa setglobal noautoread " Reset global and local value (without triggering autocmd)
+  noa setlocal autoread
+  let g:options=[['autoread', '1', '1', '', '0', 'local', 'setlocal']]
+  setlocal noautoread
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 29c: Setting again boolean global-local (to buffer) option"
+  noa setglobal noautoread " Reset global and local value (without triggering autocmd)
+  noa setlocal autoread
+  let g:options=[['autoread', '1', '1', '0', '1', 'global', 'set']]
+  set autoread
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 29d: Setting again global boolean global-local (to buffer) option"
+  noa set noautoread " Reset global and local value (without triggering autocmd)
+  let g:options=[['autoread', '0', '0', '0', '1', 'global', 'set']]
+  set autoread
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+
+  " 30a: Setting global boolean local (to buffer) option"
+  noa setglobal nocindent " Reset global and local value (without triggering autocmd)
+  noa setlocal cindent
+  let g:options=[['cindent', '0', '', '0', '1', 'global', 'setglobal']]
+  setglobal cindent
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 30b: Setting local boolean local (to buffer) option"
+  noa setglobal nocindent " Reset global and local value (without triggering autocmd)
+  noa setlocal cindent
+  let g:options=[['cindent', '1', '1', '', '0', 'local', 'setlocal']]
+  setlocal nocindent
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 30c: Setting again boolean local (to buffer) option"
+  noa setglobal nocindent " Reset global and local value (without triggering autocmd)
+  noa setlocal cindent
+  let g:options=[['cindent', '1', '1', '0', '1', 'global', 'set']]
+  set cindent
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 30d: Setting again global boolean local (to buffer) option"
+  noa set nocindent " Reset global and local value (without triggering autocmd)
+  let g:options=[['cindent', '0', '0', '0', '1', 'global', 'set']]
+  set cindent
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+
+  " 31: Setting boolean global-local (to window) option
+  " Currently no such option exists.
+
+
+  " 32a: Setting global boolean local (to window) option"
+  noa setglobal nocursorcolumn " Reset global and local value (without triggering autocmd)
+  noa setlocal cursorcolumn
+  let g:options=[['cursorcolumn', '0', '', '0', '1', 'global', 'setglobal']]
+  setglobal cursorcolumn
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 32b: Setting local boolean local (to window) option"
+  noa setglobal nocursorcolumn " Reset global and local value (without triggering autocmd)
+  noa setlocal cursorcolumn
+  let g:options=[['cursorcolumn', '1', '1', '', '0', 'local', 'setlocal']]
+  setlocal nocursorcolumn
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 32c: Setting again boolean local (to window) option"
+  noa setglobal nocursorcolumn " Reset global and local value (without triggering autocmd)
+  noa setlocal cursorcolumn
+  let g:options=[['cursorcolumn', '1', '1', '0', '1', 'global', 'set']]
+  set cursorcolumn
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+  " 32d: Setting again global boolean local (to window) option"
+  noa set nocursorcolumn " Reset global and local value (without triggering autocmd)
+  let g:options=[['cursorcolumn', '0', '0', '0', '1', 'global', 'set']]
+  set cursorcolumn
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+
+  " 33: Test autocomands when an option value is converted internally.
+  noa set backspace=1 " Reset global and local value (without triggering autocmd)
+  let g:options=[['backspace', 'indent,eol', 'indent,eol', 'indent,eol', '2', 'global', 'set']]
+  set backspace=2
+  call assert_equal([], g:options)
+  call assert_equal(g:opt[0], g:opt[1])
+
+
   " Cleanup
   au! OptionSet
-  for opt in ['nu', 'ai', 'acd', 'ar', 'bs', 'backup', 'cul', 'cp']
+  for opt in ['nu', 'ai', 'acd', 'ar', 'bs', 'backup', 'cul', 'cp', 'backupext', 'tags', 'spelllang', 'statusline', 'foldignore', 'cmdheight', 'undolevels', 'wrapmargin', 'foldcolumn', 'wrapscan', 'autoread', 'cindent', 'cursorcolumn']
     exe printf(":set %s&vim", opt)
   endfor
   call test_override('starting', 0)
diff --git a/src/version.c b/src/version.c
index abafa7e..931b3af 100644
--- a/src/version.c
+++ b/src/version.c
@@ -778,6 +778,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1542,
+/**/
     1541,
 /**/
     1540,
diff --git a/src/vim.h b/src/vim.h
index d6bc6c3..481d065 100644
--- a/src/vim.h
+++ b/src/vim.h
@@ -1935,41 +1935,44 @@
 #define VV_COMPLETED_ITEM 60
 #define VV_OPTION_NEW   61
 #define VV_OPTION_OLD   62
-#define VV_OPTION_TYPE  63
-#define VV_ERRORS	64
-#define VV_FALSE	65
-#define VV_TRUE		66
-#define VV_NULL		67
-#define VV_NONE		68
-#define VV_VIM_DID_ENTER 69
-#define VV_TESTING	70
-#define VV_TYPE_NUMBER	71
-#define VV_TYPE_STRING	72
-#define VV_TYPE_FUNC	73
-#define VV_TYPE_LIST	74
-#define VV_TYPE_DICT	75
-#define VV_TYPE_FLOAT	76
-#define VV_TYPE_BOOL	77
-#define VV_TYPE_NONE	78
-#define VV_TYPE_JOB	79
-#define VV_TYPE_CHANNEL	80
-#define VV_TYPE_BLOB	81
-#define VV_TERMRFGRESP	82
-#define VV_TERMRBGRESP	83
-#define VV_TERMU7RESP	84
-#define VV_TERMSTYLERESP 85
-#define VV_TERMBLINKRESP 86
-#define VV_EVENT	87
-#define VV_VERSIONLONG	88
-#define VV_LEN		89	// number of v: vars
+#define VV_OPTION_OLDLOCAL 63
+#define VV_OPTION_OLDGLOBAL 64
+#define VV_OPTION_COMMAND 65
+#define VV_OPTION_TYPE  66
+#define VV_ERRORS	67
+#define VV_FALSE	68
+#define VV_TRUE		69
+#define VV_NULL		70
+#define VV_NONE		71
+#define VV_VIM_DID_ENTER 72
+#define VV_TESTING	73
+#define VV_TYPE_NUMBER	74
+#define VV_TYPE_STRING	75
+#define VV_TYPE_FUNC	76
+#define VV_TYPE_LIST	77
+#define VV_TYPE_DICT	78
+#define VV_TYPE_FLOAT	79
+#define VV_TYPE_BOOL	80
+#define VV_TYPE_NONE	81
+#define VV_TYPE_JOB	82
+#define VV_TYPE_CHANNEL	83
+#define VV_TYPE_BLOB	84
+#define VV_TERMRFGRESP	85
+#define VV_TERMRBGRESP	86
+#define VV_TERMU7RESP	87
+#define VV_TERMSTYLERESP 88
+#define VV_TERMBLINKRESP 89
+#define VV_EVENT	90
+#define VV_VERSIONLONG	91
+#define VV_LEN		92	// number of v: vars
 
-/* used for v_number in VAR_SPECIAL */
+// used for v_number in VAR_SPECIAL
 #define VVAL_FALSE	0L
 #define VVAL_TRUE	1L
 #define VVAL_NONE	2L
 #define VVAL_NULL	3L
 
-/* Type values for type(). */
+// Type values for type().
 #define VAR_TYPE_NUMBER	    0
 #define VAR_TYPE_STRING	    1
 #define VAR_TYPE_FUNC	    2