# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1613584804 -3600
# Node ID a620df0ebbe55f357f374d1b2b940b384be1d7b7
# Parent  275505319b8005a14fce93a0055cff651f1c3c74
patch 8.2.2528: Vim9: crash when compiling lambda fails

Commit: https://github.com/vim/vim/commit/c7dac8534ee7f7a49e9d7a37330397c64455cdd7
Author: Bram Moolenaar <Bram@vim.org>
Date:   Wed Feb 17 18:49:11 2021 +0100

    patch 8.2.2528: Vim9: crash when compiling lambda fails

    Problem:    Vim9: crash when compiling lambda fails.
    Solution:   Bail out after compilation fails. (closes https://github.com/vim/vim/issues/7862)

diff --git a/src/eval.c b/src/eval.c
--- 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
--- 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
--- 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 */
 /**/
+    2528,
+/**/
     2527,
 /**/
     2526,