commit caf6434ac937cf26050276d7b474be2d2d6a06b3
author Bram Moolenaar <Bram@vim.org> Thu Mar 02 22:11:33 2017 +0100
committer Bram Moolenaar <Bram@vim.org> Thu Mar 02 22:11:33 2017 +0100
tree 8728fa627626f54449193af1359da6ec7f1c6e9e
parent 66727e16079fbac6db3897b5c3736ec9fba995bb

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)

src/evalfunc.c

diff --git a/src/evalfunc.c b/src/evalfunc.c
index 70b90ad..20c5f89 100644
--- a/src/evalfunc.c
+++ b/src/evalfunc.c
@@ -1375,7 +1375,8 @@
     static void
 f_balloon_show(typval_T *argvars, typval_T *rettv UNUSED)
 {
-    gui_mch_post_balloon(balloonEval, get_tv_string_chk(&argvars[0]));
+    if (balloonEval != NULL)
+	gui_mch_post_balloon(balloonEval, get_tv_string_chk(&argvars[0]));
 }
 #endif