# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1624728603 -7200
# Node ID efdb9608cc1157175f8691cf3f26c25203cd257e
# Parent  811921061790676f51cb2df9a9933c5d2f0433a8
patch 8.2.3056: Vim9: using default value in lambda gives confusing error

Commit: https://github.com/vim/vim/commit/14ded11fcad77ebf41032ec80a95d516ca9acb1c
Author: Bram Moolenaar <Bram@vim.org>
Date:   Sat Jun 26 19:25:49 2021 +0200

    patch 8.2.3056: Vim9: using default value in lambda gives confusing error

    Problem:    Vim9: using default value in lambda gives confusing error.
    Solution:   Pass "default_args" on the first pass to get the arguments.
                (closes #8455)

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
@@ -918,6 +918,12 @@ def Test_call_lambda_args()
   CheckScriptFailure(['vim9script'] + lines, 'E1168:')
 
   lines =<< trim END
+    var Ref: func(any, ?any): bool
+    Ref = (_, y = 1) => false
+  END
+  CheckDefAndScriptFailure(lines, 'E1172:')
+
+  lines =<< trim END
       def ShadowLocal()
         var one = 1
         var l = [1, 2, 3]
diff --git a/src/userfunc.c b/src/userfunc.c
--- a/src/userfunc.c
+++ b/src/userfunc.c
@@ -1222,7 +1222,7 @@ get_lambda_tv(
     s = *arg + 1;
     ret = get_function_args(&s, equal_arrow ? ')' : '-', NULL,
 	    types_optional ? &argtypes : NULL, types_optional, evalarg,
-						 NULL, NULL, TRUE, NULL, NULL);
+					NULL, &default_args, TRUE, NULL, NULL);
     if (ret == FAIL || skip_arrow(s, equal_arrow, &ret_type, NULL) == NULL)
     {
 	if (types_optional)
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -756,6 +756,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    3056,
+/**/
     3055,
 /**/
     3054,