From: Bram Moolenaar <Bram@vim.org>
Date: Sun, 7 Feb 2021 14:59:49 +0000 (+0100)
Subject: patch 8.2.2481: Vim9: confusing error when variable arguments have default
X-Git-Tag: v8.2.2481
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=4f53b79bf5f8b0de7c6933fd157894ba7a53f35e;p=vim

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
index 73ff693fa..cdaba5af7 100644
--- 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
index e220781b1..82df0bb96 100644
--- 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
index 871e04892..c6f44a401 100644
--- a/src/version.c
+++ b/src/version.c
@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2481,
 /**/
     2480,
 /**/