patch 7.4.2139
Problem:    :delfunction causes illegal memory access.
Solution:   Correct logic when deciding to free a function.
diff --git a/src/testdir/test_lambda.vim b/src/testdir/test_lambda.vim
index 721c47d..1df1f1c 100644
--- a/src/testdir/test_lambda.vim
+++ b/src/testdir/test_lambda.vim
@@ -267,7 +267,6 @@
   call assert_equal(2, g:Count())
   call assert_equal(3, g:Count2())
 
-  " This causes memory access errors.
-  " delfunc LambdaFoo
-  " delfunc LambdaBar
+  delfunc LambdaFoo
+  delfunc LambdaBar
 endfunc