From: Bram Moolenaar <Bram@vim.org>
Date: Wed, 17 Feb 2021 17:49:11 +0000 (+0100)
Subject: patch 8.2.2528: Vim9: crash when compiling lambda fails
X-Git-Tag: v8.2.2528
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c7dac8534ee7f7a49e9d7a37330397c64455cdd7;p=thirdparty%2Fvim.git

patch 8.2.2528: Vim9: crash when compiling lambda fails

Problem:    Vim9: crash when compiling lambda fails.
Solution:   Bail out after compilation fails. (closes #7862)
---

diff --git a/src/eval.c b/src/eval.c
index 785d8417a4..444c0faf38 100644
--- a/src/eval.c
+++ b/src/eval.c
@@ -3428,8 +3428,12 @@ eval7(
 			ufunc_T *ufunc = rettv->vval.v_partial->pt_func;
 
 			// compile it here to get the return type
-			compile_def_function(ufunc,
-						 TRUE, PROFILING(ufunc), NULL);
+			if (compile_def_function(ufunc,
+					 TRUE, PROFILING(ufunc), NULL) == FAIL)
+			{
+			    clear_tv(rettv);
+			    ret = FAIL;
+			}
 		    }
 		}
 		if (ret == NOTDONE)
diff --git a/src/testdir/test_vim9_assign.vim b/src/testdir/test_vim9_assign.vim
index 4c63217f26..392a091a1a 100644
--- a/src/testdir/test_vim9_assign.vim
+++ b/src/testdir/test_vim9_assign.vim
@@ -1118,6 +1118,11 @@ def Test_assign_lambda()
       Ref = (j) => !j
   END
   CheckDefAndScriptFailure(lines, 'E1012: Type mismatch; expected func(number) but got func(any): bool')
+
+  lines =<< trim END
+      echo filter([1, 2, 3], (_, v: string) => v + 1) 
+  END
+  CheckDefAndScriptFailure(lines, 'E1051:')
 enddef
 
 def Test_heredoc()
diff --git a/src/version.c b/src/version.c
index 0fb889621d..4c0fb5c1e5 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 */
+/**/
+    2528,
 /**/
     2527,
 /**/