From 83ad0147c02606ad1d32f62e84b65402bca9efec Mon Sep 17 00:00:00 2001 From: Bram Moolenaar Date: Tue, 25 May 2010 22:09:21 +0200 Subject: [PATCH] Fix for using ":wundo foo" when foo is an empty file. --- src/undo.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/src/undo.c b/src/undo.c index 35fa31064..787f62590 100644 --- a/src/undo.c +++ b/src/undo.c @@ -1286,11 +1286,12 @@ u_write_undo(name, forceit, buf, hash) } else { - char_u buf[2]; + char_u buf[2]; + int len; - vim_read(fd, buf, 2); + len = vim_read(fd, buf, 2); close(fd); - if ((buf[0] << 8) + buf[1] != UF_START_MAGIC) + if (len < 2 || (buf[0] << 8) + buf[1] != UF_START_MAGIC) { if (name != NULL || p_verbose > 0) smsg((char_u *)_("Will not overwrite, this is not an undo file: %s"), -- 2.50.1