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Re: coreutils-6.8 - error in expr
From: |
Paul Eggert |
Subject: |
Re: coreutils-6.8 - error in expr |
Date: |
Tue, 12 Jun 2007 10:45:49 -0700 |
User-agent: |
Gnus/5.110006 (No Gnus v0.6) Emacs/21.4 (gnu/linux) |
Jim Meyering <address@hidden> writes:
> That will ensure that you use the regex code bundled with coreutils,
> which may be less buggy than what's in your systems C library.
In the meantime it shouldn't hurt to test for the buggy regexp he
mentioned. I installed this into gnulib:
2007-06-12 Paul Eggert <address@hidden>
* m4/regex.m4 (gl_REGEX): Catch a bug with [[:alnum:]_-] reported by
Vin Shelton.
--- m4/regex.m4 6 Jun 2007 18:35:18 -0000 1.65
+++ m4/regex.m4 12 Jun 2007 17:44:33 -0000
@@ -1,4 +1,4 @@
-#serial 46
+#serial 47
# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005,
# 2006, 2007 Free Software Foundation, Inc.
@@ -137,6 +137,17 @@ AC_DEFUN([gl_REGEX],
if (re_search (®ex, "WXY", 3, 0, 3, ®s) < 0)
return 1;
+ /* Catch a bug reported by Vin Shelton in
+
http://lists.gnu.org/archive/html/bug-coreutils/2007-06/msg00089.html
+ */
+ re_set_syntax (RE_SYNTAX_POSIX_BASIC
+ & ~RE_CONTEXT_INVALID_DUP
+ & ~RE_NO_EMPTY_RANGES);
+ memset (®ex, 0, sizeof regex);
+ s = re_compile_pattern ("[[:alnum:]_-]\\\\+$", 16, ®ex);
+ if (s)
+ return 1;
+
/* REG_STARTEND was added to glibc on 2004-01-15.
Reject older versions. */
if (! REG_STARTEND)
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