# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1612710004 -3600
# Node ID 9ddf1a537fc2b6a2f3ed45bec5dd1c6cc9c79ec6
# Parent  27d60e2c71b872e1642c13d0a2c67d7a6254f623
patch 8.2.2481: Vim9: confusing error when variable arguments have default

Commit: https://github.com/vim/vim/commit/4f53b79bf5f8b0de7c6933fd157894ba7a53f35e
Author: Bram Moolenaar <Bram@vim.org>
Date:   Sun Feb 7 15:59:49 2021 +0100

    patch 8.2.2481: Vim9: confusing error when variable arguments have default

    Problem:    Vim9: confusing error when variable arguments have a default
                value.
    Solution:   Give a specific error message. (closes #7793)

diff --git a/src/testdir/test_vim9_func.vim b/src/testdir/test_vim9_func.vim
--- a/src/testdir/test_vim9_func.vim
+++ b/src/testdir/test_vim9_func.vim
@@ -781,6 +781,16 @@ def Test_call_def_varargs()
       Func(1, 'a')
   END
   CheckScriptFailure(lines, 'E1013: Argument 1: type mismatch')
+
+  lines =<< trim END
+      vim9script
+      def Func(  # some comment
+                ...l = []
+                )
+        echo l
+      enddef
+  END
+  CheckScriptFailure(lines, 'E1160:')
 enddef
 
 let s:value = ''
diff --git a/src/userfunc.c b/src/userfunc.c
--- a/src/userfunc.c
+++ b/src/userfunc.c
@@ -241,6 +241,11 @@ get_function_args(
 									 skip);
 		if (p == arg)
 		    break;
+		if (*skipwhite(p) == '=')
+		{
+		    emsg(_(e_cannot_use_default_for_variable_arguments));
+		    break;
+		}
 	    }
 	}
 	else
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -751,6 +751,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    2481,
+/**/
     2480,
 /**/
     2479,