commit ca4b613c692b927c9345dc9e3d6be5de35266be2
author Bram Moolenaar <Bram@vim.org> Thu Jun 28 12:05:11 2018 +0200
committer Bram Moolenaar <Bram@vim.org> Thu Jun 28 12:05:11 2018 +0200
tree fda5e9dfd74a771d6231b7dc5d35c9ade0b9b7bc
parent dc9e955fb07f410d5d3e981ce18d895dd2847c85

patch 8.1.0121: crash when using ballooneval related to 'vartabstop'

Problem:    Crash when using ballooneval related to 'vartabstop'.
Solution:   Initialize balloonEval->vts to NULL. (Markus Braun)

src/ex_cmds2.c

diff --git a/src/ex_cmds2.c b/src/ex_cmds2.c
index 01bc357..5f58fed 100644
--- a/src/ex_cmds2.c
+++ b/src/ex_cmds2.c
@@ -1419,7 +1419,7 @@
 	    bevalexpr_due_set = FALSE;
 	    if (balloonEval == NULL)
 	    {
-		balloonEval = (BalloonEval *)alloc(sizeof(BalloonEval));
+		balloonEval = (BalloonEval *)alloc_clear(sizeof(BalloonEval));
 		balloonEvalForTerm = TRUE;
 	    }
 	    if (balloonEval != NULL)