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)

--- 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()