patch 8.0.0399: crash when using balloon_show() when not supported commit https://github.com/vim/vim/commit/caf6434ac937cf26050276d7b474be2d2d6a06b3 Author: Bram Moolenaar <Bram@vim.org> Date: Thu Mar 2 22:11:33 2017 +0100 patch 8.0.0399: crash when using balloon_show() when not supported Problem: Crash when using balloon_show() when not supported. (Hirohito Higashi) Solution: Check for balloonEval not to be NULL. (Ken Takata)

--- a/src/testdir/test_functions.vim
+++ b/src/testdir/test_functions.vim
@@ -466,3 +466,8 @@ func Test_getbufvar()
 
   set fileformats&
 endfunc
+
+func Test_balloon_show()
+  " This won't do anything but must not crash either.
+  call balloon_show('hi!')
+endfunc