commit 2c90d51123fba44a90e09aa4a4f2b7d972dadb94
author Bram Moolenaar <Bram@vim.org> Sat Mar 18 22:35:30 2017 +0100
committer Bram Moolenaar <Bram@vim.org> Sat Mar 18 22:35:30 2017 +0100
tree 8eb792f2c67077f20581d81eb41f6344a57e2dca
parent aab93b12cb54fbe5efe9e8f6fde1c46802a3031e

patch 8.0.0482: the setbufvar() function may mess up the window layout

Problem:    The setbufvar() function may mess up the window layout. (Kay Z.)
Solution:   Do not check the window to be valid if it is NULL.

src/window.c

diff --git a/src/window.c b/src/window.c
index 43c9ed2..06f97de 100644
--- a/src/window.c
+++ b/src/window.c
@@ -6563,7 +6563,7 @@
 		&& check_snapshot_rec(sn->fr_next, fr->fr_next) == FAIL)
 	    || (sn->fr_child != NULL
 		&& check_snapshot_rec(sn->fr_child, fr->fr_child) == FAIL)
-	    || !win_valid(sn->fr_win))
+	    || (sn->fr_win != NULL && !win_valid(sn->fr_win)))
 	return FAIL;
     return OK;
 }