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/gui.c

diff --git a/src/gui.c b/src/gui.c
index 87ea5ce..f51b81f 100644
--- a/src/gui.c
+++ b/src/gui.c
@@ -745,7 +745,12 @@
 	/* Always create the Balloon Evaluation area, but disable it when
 	 * 'ballooneval' is off. */
 	if (balloonEval != NULL)
+	{
+# ifdef FEAT_VARTABS
+	    vim_free(balloonEval->vts);
+# endif
 	    vim_free(balloonEval);
+	}
 	balloonEvalForTerm = FALSE;
 # ifdef FEAT_GUI_GTK
 	balloonEval = gui_mch_create_beval_area(gui.drawarea, NULL,