# HG changeset patch
# User Bram Moolenaar <Bram@vim.org>
# Date 1559592905 -7200
# Node ID 66a94fd8e37d8b2c776f6c30cccb68ffbf3c5aa5
# Parent  1d61668fb2481beedd0499aaa453316cec33c603
patch 8.1.1458: crash when using gtags

commit https://github.com/vim/vim/commit/0b4c9eddb5752d46b65d16e42230b1228f230f40
Author: Bram Moolenaar <Bram@vim.org>
Date:   Mon Jun 3 22:04:23 2019 +0200

    patch 8.1.1458: crash when using gtags

    Problem:    Crash when using gtags. (issue https://github.com/vim/vim/issues/4102)
    Solution:   Check for negative row or col in screen_puts_len(). (Christian
                Brabandt)

diff --git a/src/screen.c b/src/screen.c
--- a/src/screen.c
+++ b/src/screen.c
@@ -7707,7 +7707,11 @@ screen_puts_len(
     int		force_redraw_next = FALSE;
     int		need_redraw;
 
-    if (ScreenLines == NULL || row >= screen_Rows)	/* safety check */
+    // Safety check. The check for negative row and column is to fix issue
+    // #4102. TODO: find out why row/col could be negative.
+    if (ScreenLines == NULL
+	    || row >= screen_Rows || row < 0
+	    || col >= screen_Columns || col < 0)
 	return;
     off = LineOffset[row] + col;
 
diff --git a/src/version.c b/src/version.c
--- a/src/version.c
+++ b/src/version.c
@@ -768,6 +768,8 @@ static char *(features[]) =
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1458,
+/**/
     1457,
 /**/
     1456,