diff --git a/src/menu.c b/src/menu.c
index b9f7db2..2cd3270 100644
--- a/src/menu.c
+++ b/src/menu.c
@@ -2830,9 +2830,27 @@
  * Get the information about a menu item in mode 'which'
  */
     static int
-menuitem_getinfo(vimmenu_T *menu, int modes, dict_T *dict)
+menuitem_getinfo(char_u *menu_name, vimmenu_T *menu, int modes, dict_T *dict)
 {
     int		status;
+    list_T	*l;
+
+    if (*menu_name == NUL)
+    {
+	// Return all the top-level menus
+	vimmenu_T	*topmenu;
+
+	l = list_alloc();
+	if (l == NULL)
+	    return FAIL;
+
+	dict_add_list(dict, "submenus", l);
+	// get all the children.  Skip PopUp[nvoci].
+	for (topmenu = menu; topmenu != NULL; topmenu = topmenu->next)
+	    if (!menu_is_hidden(topmenu->dname))
+		list_append_string(l, topmenu->dname, -1);
+	return OK;
+    }
 
     if (menu_is_tearoff(menu->dname))		// skip tearoff menu item
 	return OK;
@@ -2903,9 +2921,9 @@
     // If there are submenus, add all the submenu display names
     if (status == OK && menu->children != NULL)
     {
-	list_T		*l = list_alloc();
 	vimmenu_T	*child;
 
+	l = list_alloc();
 	if (l == NULL)
 	    return FAIL;
 
@@ -2992,7 +3010,7 @@
 	return;
 
     if (menu->modes & modes)
-	menuitem_getinfo(menu, modes, retdict);
+	menuitem_getinfo(menu_name, menu, modes, retdict);
 }
 
 #endif // FEAT_MENU
diff --git a/src/testdir/test_menu.vim b/src/testdir/test_menu.vim
index 3df1560..c867162 100644
--- a/src/testdir/test_menu.vim
+++ b/src/testdir/test_menu.vim
@@ -407,6 +407,9 @@
         \ shortcut: '', modes: ' ', submenus: ['menu']},
         \ menu_info(']Test'))
   unmenu ]Test
+
+  " Test for getting all the top-level menu names
+  call assert_notequal(menu_info('').submenus, [])
 endfunc
 
 " Test for <special> keyword in a menu with 'cpo' containing '<'
diff --git a/src/testdir/test_vim9_builtin.vim b/src/testdir/test_vim9_builtin.vim
index 164fc45..03db4e6 100644
--- a/src/testdir/test_vim9_builtin.vim
+++ b/src/testdir/test_vim9_builtin.vim
@@ -201,6 +201,8 @@
   CheckDefAndScriptFailure2(['appendbufline(1, [1], "x")'], 'E1013: Argument 2: type mismatch, expected string but got list<number>', 'E1220: String or Number required for argument 2')
   CheckDefAndScriptFailure2(['appendbufline(1, 1, {"a": 10})'], 'E1013: Argument 3: type mismatch, expected string but got dict<number>', 'E1224: String, Number or List required for argument 3')
   bnum->bufwinid()->win_gotoid()
+  appendbufline('', 0, 'numbers')
+  getline(1)->assert_equal('numbers')
   bwipe!
 enddef
 
@@ -326,6 +328,7 @@
 
 def Test_bufload()
   assert_fails('bufload([])', 'E1220:')
+  bufload('')->assert_equal(0)
 enddef
 
 def Test_bufloaded()
@@ -452,6 +455,10 @@
   else
     CheckDefAndScriptFailure2(['ch_getbufnr(1, "a")'], 'E1013: Argument 1: type mismatch, expected channel but got number', 'E1217: Channel or Job required for argument 1')
     CheckDefAndScriptFailure2(['ch_getbufnr(test_null_channel(), 1)'], 'E1013: Argument 2: type mismatch, expected string but got number', 'E1174: String required for argument 2')
+    # test empty string argument for ch_getbufnr()
+    var job: job = job_start(&shell)
+    job->ch_getbufnr('')->assert_equal(-1)
+    job_stop(job)
   endif
 enddef
 
@@ -488,6 +495,7 @@
   else
     assert_fails('ch_logfile(true)', 'E1174:')
     assert_fails('ch_logfile("foo", true)', 'E1174:')
+    ch_logfile('', '')->assert_equal(0)
 
     CheckDefAndScriptFailure2(['ch_logfile(1)'], 'E1013: Argument 1: type mismatch, expected string but got number', 'E1174: String required for argument 1')
     CheckDefAndScriptFailure2(['ch_logfile("a", true)'], 'E1013: Argument 2: type mismatch, expected string but got bool', 'E1174: String required for argument 2')
@@ -749,6 +757,11 @@
   CheckDefAndScriptFailure2(['deletebufline([], 2)'], 'E1013: Argument 1: type mismatch, expected string but got list<unknown>', 'E1220: String or Number required for argument 1')
   CheckDefAndScriptFailure2(['deletebufline("a", [])'], 'E1013: Argument 2: type mismatch, expected string but got list<unknown>', 'E1220: String or Number required for argument 2')
   CheckDefAndScriptFailure2(['deletebufline("a", 2, 0z10)'], 'E1013: Argument 3: type mismatch, expected string but got blob', 'E1220: String or Number required for argument 3')
+  new
+  setline(1, ['one', 'two'])
+  deletebufline('', 1)
+  getline(1, '$')->assert_equal(['two'])
+  bwipe!
 enddef
 
 def Test_diff_filler()
@@ -2705,6 +2718,7 @@
   CheckDefAndScriptFailure2(['remote_expr("a", 2)'], 'E1013: Argument 2: type mismatch, expected string but got number', 'E1174: String required for argument 2')
   CheckDefAndScriptFailure2(['remote_expr("a", "b", 3)'], 'E1013: Argument 3: type mismatch, expected string but got number', 'E1174: String required for argument 3')
   CheckDefAndScriptFailure2(['remote_expr("a", "b", "c", "d")'], 'E1013: Argument 4: type mismatch, expected number but got string', 'E1210: Number required for argument 4')
+  CheckDefExecAndScriptFailure(['remote_expr("", "")'], 'E241: Unable to send to ')
 enddef
 
 def Test_remote_foreground()
@@ -2715,6 +2729,7 @@
 
   CheckDefAndScriptFailure2(['remote_foreground(10)'], 'E1013: Argument 1: type mismatch, expected string but got number', 'E1174: String required for argument 1')
   assert_fails('remote_foreground("NonExistingServer")', 'E241:')
+  assert_fails('remote_foreground("")', 'E241:')
 enddef
 
 def Test_remote_peek()
@@ -2739,6 +2754,7 @@
   CheckDefAndScriptFailure2(['remote_send(1, "b")'], 'E1013: Argument 1: type mismatch, expected string but got number', 'E1174: String required for argument 1')
   CheckDefAndScriptFailure2(['remote_send("a", 2)'], 'E1013: Argument 2: type mismatch, expected string but got number', 'E1174: String required for argument 2')
   CheckDefAndScriptFailure2(['remote_send("a", "b", 3)'], 'E1013: Argument 3: type mismatch, expected string but got number', 'E1174: String required for argument 3')
+  assert_fails('remote_send("", "")', 'E241:')
 enddef
 
 def Test_remote_startserver()
@@ -2985,6 +3001,7 @@
   CheckDefAndScriptFailure2(['server2client(10, "b")'], 'E1013: Argument 1: type mismatch, expected string but got number', 'E1174: String required for argument 1')
   CheckDefAndScriptFailure2(['server2client("a", 10)'], 'E1013: Argument 2: type mismatch, expected string but got number', 'E1174: String required for argument 2')
   CheckDefExecAndScriptFailure(['server2client("", "a")'], 'E573: Invalid server id used')
+  CheckDefExecAndScriptFailure(['server2client("", "")'], 'E573: Invalid server id used')
 enddef
 
 def Test_shellescape()
@@ -3087,6 +3104,8 @@
   CheckDefAndScriptFailure2(['setbufline(1, [1], "x")'], 'E1013: Argument 2: type mismatch, expected string but got list<number>', 'E1220: String or Number required for argument 2')
   CheckDefAndScriptFailure2(['setbufline(1, 1, {"a": 10})'], 'E1013: Argument 3: type mismatch, expected string but got dict<number>', 'E1224: String, Number or List required for argument 3')
   bnum->bufwinid()->win_gotoid()
+  setbufline('', 1, 'nombres')
+  getline(1)->assert_equal('nombres')
   bw!
 enddef
 
@@ -3244,6 +3263,8 @@
   CheckDefAndScriptFailure2(['sign_getplaced(["x"])'], 'E1013: Argument 1: type mismatch, expected string but got list<string>', 'E1220: String or Number required for argument 1')
   CheckDefAndScriptFailure2(['sign_getplaced(1, ["a"])'], 'E1013: Argument 2: type mismatch, expected dict<any> but got list<string>', 'E1206: Dictionary required for argument 2')
   CheckDefAndScriptFailure2(['sign_getplaced("a", 1.1)'], 'E1013: Argument 2: type mismatch, expected dict<any> but got float', 'E1206: Dictionary required for argument 2')
+  CheckDefExecAndScriptFailure(['sign_getplaced(bufnr(), {lnum: ""})'], 'E1030: Using a String as a Number:')
+  sign_getplaced('')->assert_equal([{signs: [], bufnr: bufnr()}])
 enddef
 
 def Test_sign_jump()
@@ -3258,12 +3279,14 @@
   CheckDefAndScriptFailure2(['sign_place(1, "b", 3, "d")'], 'E1013: Argument 3: type mismatch, expected string but got number', 'E1174: String required for argument 3')
   CheckDefAndScriptFailure2(['sign_place(1, "b", "c", 1.1)'], 'E1013: Argument 4: type mismatch, expected string but got float', 'E1220: String or Number required for argument 4')
   CheckDefAndScriptFailure2(['sign_place(1, "b", "c", "d", [1])'], 'E1013: Argument 5: type mismatch, expected dict<any> but got list<number>', 'E1206: Dictionary required for argument 5')
+  CheckDefExecAndScriptFailure(['sign_place(0, "", "MySign", bufnr(), {lnum: ""})'], 'E1209: Invalid value for a line number: ""')
   assert_fails("sign_place(0, '', '', '')", 'E155:')
 enddef
 
 def Test_sign_placelist()
   CheckDefAndScriptFailure2(['sign_placelist("x")'], 'E1013: Argument 1: type mismatch, expected list<any> but got string', 'E1211: List required for argument 1')
   CheckDefAndScriptFailure2(['sign_placelist({"a": 10})'], 'E1013: Argument 1: type mismatch, expected list<any> but got dict<number>', 'E1211: List required for argument 1')
+  CheckDefExecAndScriptFailure(['sign_placelist([{"name": "MySign", "buffer": bufnr(), "lnum": ""}])'], 'E1209: Invalid value for a line number: ""')
 enddef
 
 def Test_sign_undefine()
diff --git a/src/version.c b/src/version.c
index 54e5c60..8436095 100644
--- a/src/version.c
+++ b/src/version.c
@@ -758,6 +758,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3459,
+/**/
     3458,
 /**/
     3457,