diff --git a/src/eval.c b/src/eval.c
index 9491f4f..cc23de4 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -11814,6 +11814,7 @@
     char_u	*s;
     char_u	*name;
     int		use_string = FALSE;
+    partial_T   *arg_pt = NULL;
 
     if (argvars[0].v_type == VAR_FUNC)
     {
@@ -11822,8 +11823,11 @@
     }
     else if (argvars[0].v_type == VAR_PARTIAL
 					 && argvars[0].vval.v_partial != NULL)
+    {
 	/* function(dict.MyFunc, [arg]) */
-	s = argvars[0].vval.v_partial->pt_name;
+	arg_pt = argvars[0].vval.v_partial;
+	s = arg_pt->pt_name;
+    }
     else
     {
 	/* function('MyFunc', [arg], dict) */
@@ -11901,19 +11905,27 @@
 		    arg_idx = 0;
 	    }
 	}
-	if (dict_idx > 0 || arg_idx > 0)
+	if (dict_idx > 0 || arg_idx > 0 || arg_pt != NULL)
 	{
 	    partial_T	*pt = (partial_T *)alloc_clear(sizeof(partial_T));
 
+	    /* result is a VAR_PARTIAL */
 	    if (pt != NULL)
 	    {
-		if (arg_idx > 0)
+		if (arg_idx > 0 || (arg_pt != NULL && arg_pt->pt_argc > 0))
 		{
 		    listitem_T	*li;
 		    int		i = 0;
+		    int		arg_len = 0;
+		    int		lv_len = 0;
 
+		    if (arg_pt != NULL)
+			arg_len = arg_pt->pt_argc;
+		    if (list != NULL)
+			lv_len = list->lv_len;
+		    pt->pt_argc = arg_len + lv_len;
 		    pt->pt_argv = (typval_T *)alloc(
-					     sizeof(typval_T) * list->lv_len);
+					      sizeof(typval_T) * pt->pt_argc);
 		    if (pt->pt_argv == NULL)
 		    {
 			vim_free(pt);
@@ -11922,9 +11934,12 @@
 		    }
 		    else
 		    {
-			pt->pt_argc = list->lv_len;
-			for (li = list->lv_first; li != NULL; li = li->li_next)
-			    copy_tv(&li->li_tv, &pt->pt_argv[i++]);
+			for (i = 0; i < arg_len; i++)
+			    copy_tv(&arg_pt->pt_argv[i], &pt->pt_argv[i]);
+			if (lv_len > 0)
+			    for (li = list->lv_first; li != NULL;
+							     li = li->li_next)
+				copy_tv(&li->li_tv, &pt->pt_argv[i++]);
 		    }
 		}
 
@@ -11935,10 +11950,11 @@
 		    pt->pt_dict = argvars[dict_idx].vval.v_dict;
 		    ++pt->pt_dict->dv_refcount;
 		}
-		else if (argvars[0].v_type == VAR_PARTIAL)
+		else if (arg_pt != NULL)
 		{
-		    pt->pt_dict = argvars[0].vval.v_partial->pt_dict;
-		    ++pt->pt_dict->dv_refcount;
+		    pt->pt_dict = arg_pt->pt_dict;
+		    if (pt->pt_dict != NULL)
+			++pt->pt_dict->dv_refcount;
 		}
 
 		pt->pt_refcount = 1;
@@ -11950,6 +11966,7 @@
 	}
 	else
 	{
+	    /* result is a VAR_FUNC */
 	    rettv->v_type = VAR_FUNC;
 	    rettv->vval.v_string = name;
 	    func_ref(name);
diff --git a/src/testdir/test_partial.vim b/src/testdir/test_partial.vim
index 21ad737..71d1837 100644
--- a/src/testdir/test_partial.vim
+++ b/src/testdir/test_partial.vim
@@ -20,9 +20,17 @@
   call Cb("zzz")
   call assert_equal("foo/bar/xxx", Cb("xxx"))
   call assert_equal("foo/bar/yyy", call(Cb, ["yyy"]))
+  let Cb2 = function(Cb)
+  call assert_equal("foo/bar/zzz", Cb2("zzz"))
+  let Cb3 = function(Cb, ["www"])
+  call assert_equal("foo/bar/www", Cb3())
 
   let Cb = function('MyFunc', [])
   call assert_equal("a/b/c", Cb("a", "b", "c"))
+  let Cb2 = function(Cb, [])
+  call assert_equal("a/b/d", Cb2("a", "b", "d"))
+  let Cb3 = function(Cb, ["a", "b"])
+  call assert_equal("a/b/e", Cb3("e"))
 
   let Sort = function('MySort', [1])
   call assert_equal([1, 2, 3], sort([3, 1, 2], Sort))
diff --git a/src/version.c b/src/version.c
index 7277cc0..ec4f909 100644
--- a/src/version.c
+++ b/src/version.c
@@ -749,6 +749,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1586,
+/**/
     1585,
 /**/
     1584,