* m4/regex.m4 (gl_REGEX): Catch a bug with [[:alnum:]_-] reported by

Vin Shelton.

diff --git a/ChangeLog b/ChangeLog
index 6287f40a698c5a7c7d83d3e7c8aedc564463e313..5c9f9228666022ab8d367956c96a68378c24aa01 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2007-06-12  Paul Eggert  <eggert@cs.ucla.edu>
+
+       * m4/regex.m4 (gl_REGEX): Catch a bug with [[:alnum:]_-] reported by
+       Vin Shelton.
+
 2007-06-11  Bruno Haible  <bruno@clisp.org>
 
        * lib/printf-args.c (PRINTF_FETCHARGS) [ENABLE_UNISTDIO]: Fix NULL

diff --git a/m4/regex.m4 b/m4/regex.m4
index c064298dc253e05d1a2bc5d20cfadee0ce6e7e1b..bde74ea5e70499137ea8c650f5d11ae27ba7034b 100644 (file)
--- a/m4/regex.m4
+++ b/m4/regex.m4
@@ -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 (&regex, "WXY", 3, 0, 3, &regs) < 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 (&regex, 0, sizeof regex);
+           s = re_compile_pattern ("[[:alnum:]_-]\\\\+$", 16, &regex);
+           if (s)
+             return 1;
+
            /* REG_STARTEND was added to glibc on 2004-01-15.
               Reject older versions.  */
            if (! REG_STARTEND)