# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1544036407 -3600
# Node ID b91cd042c2fc35c2d3e8a4070fe6b468e34ec444
# Parent  5b52bc3a02797449b8f9d397af4ad7f9b72ce974
patch 8.1.0565: asan complains about reading before allocated block

commit https://github.com/vim/vim/commit/10600db772a6b50093b8027509d7089c209d1e26
Author: Bram Moolenaar <Bram@vim.org>
Date:   Wed Dec 5 19:46:07 2018 +0100

    patch 8.1.0565: asan complains about reading before allocated block

    Problem:    Asan complains about reading before allocated block.
    Solution:   Workaround: Avoid offset from becoming negative.

diff --git a/src/gui.c b/src/gui.c
--- a/src/gui.c
+++ b/src/gui.c
@@ -2753,7 +2753,8 @@ gui_redraw_block(
 	}
 	else if (enc_utf8)
 	{
-	    if (ScreenLines[off + col1] == 0)
+	    // FIXME: how can the first character ever be zero?
+	    if (col1 > 0 && ScreenLines[off + col1] == 0)
 		--col1;
 # ifdef FEAT_GUI_GTK
 	    if (col2 + 1 < Columns && ScreenLines[off + col2 + 1] == 0)
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -793,6 +793,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    565,
+/**/
     564,
 /**/
     563,