From 0f8f332557cf678d4f895e3ec7b60fbf0adaeee7 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sat, 23 Nov 2019 17:46:39 +0000
Subject: [PATCH] pubkeys: Better debug logging for syntax errors

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 pubkeys.fl.pl | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/pubkeys.fl.pl b/pubkeys.fl.pl
index 69cc3c9..43df2e1 100755
--- a/pubkeys.fl.pl
+++ b/pubkeys.fl.pl
@@ -134,6 +134,7 @@ L	[ \t]*
 S	[ \t]+
 BASE91S	[]-~!#-&(-[]+
 %x SKIPNL
+%x SYNTAXERR
 
 %option yylineno
 %option noyywrap
@@ -267,7 +268,14 @@ static struct pubkeyset_context c[1];
 
 <INITIAL><<EOF>>	{ return 0; }
 
-<*>. { FAIL("syntax error"); }
+<*>. {
+    yymore();
+    BEGIN(SYNTAXERR);
+}
+<SYNTAXERR>.* {
+    slilog(LI,M_DEBUG,"pubkeys syntax error at `%s'", yytext);
+    FAIL("syntax error");
+}
 <*>\n { FAIL("syntax error - unexpected newline"); }
 <<EOF>> { FAIL("syntax error - unexpected eof"); }
 
-- 
2.30.2