From: Patrick McHardy <kaber@trash.net>
Date: Fri, 10 Jan 2014 09:28:37 +0000 (+0000)
Subject: erec: fix error markup for errors starting at column 0
X-Git-Tag: v0.099~33
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=806f8bba0a611fc0ce5b3104b929ce441f2b6f77;p=thirdparty%2Fnftables.git

erec: fix error markup for errors starting at column 0

For errors starting at column 0, we must not subtract 1 to avoid underflow.

Signed-off-by: Patrick McHardy <kaber@trash.net>
---

diff --git a/src/erec.c b/src/erec.c
index 7451d94ca..a157d2fa7 100644
--- a/src/erec.c
+++ b/src/erec.c
@@ -138,7 +138,8 @@ void erec_print(FILE *f, const struct error_record *erec)
 		end = 0;
 		for (l = erec->num_locations - 1; l >= 0; l--) {
 			loc = &erec->locations[l];
-			for (i = loc->first_column - 1; i < loc->last_column; i++)
+			for (i = loc->first_column ? loc->first_column - 1 : 0;
+			     i < loc->last_column; i++)
 				buf[i] = l ? '~' : '^';
 			end = max(end, loc->last_column);
 		}