[PATCH v3 4/8] t0021/rot13-filter: improve error message

[Christian Couder <christian.couder@gmail.com>]

If there is no new line at the end of something it receives,
the packet_txt_read() function die()s, but it's difficult to
debug without much context.

Let's give a bit more information when that happens.

Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
---
 t/t0021/rot13-filter.pl | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/t/t0021/rot13-filter.pl b/t/t0021/rot13-filter.pl
index 8bba97af1a..55b6e17034 100644
--- a/t/t0021/rot13-filter.pl
+++ b/t/t0021/rot13-filter.pl
@@ -98,7 +98,8 @@ sub packet_txt_read {
 	if ( $res == -1 or $buf eq '' or $buf =~ s/\n$// ) {
 		return ( $res, $buf );
 	}
-	die "A non-binary line MUST be terminated by an LF.";
+	die "A non-binary line MUST be terminated by an LF.\n"
+	    . "Received: '$buf'";
 }
 
 # Read a text line and check that it is in the form "key=value"
-- 
2.15.0.132.g7ad97d78be