(jm_INCLUDED_REGEX): Add a test for the latest bug.

diff --git a/m4/regex.m4 b/m4/regex.m4
index 35759aa..08438f4 100644 (file)
--- a/m4/regex.m4
+++ b/m4/regex.m4
@@ -1,4 +1,4 @@
-#serial 8
+#serial 9
 
 dnl Initially derived from code in GNU grep.
 dnl Mostly written by Jim Meyering.
@@ -28,6 +28,7 @@ AC_DEFUN(jm_INCLUDED_REGEX,
          {
            static struct re_pattern_buffer regex;
            const char *s;
+           struct re_registers regs;
            re_set_syntax (RE_SYNTAX_POSIX_EGREP);
            /* Add this third left square bracket, [, to balance the
               three right ones below.  Otherwise autoconf-2.14 chokes.  */
@@ -39,7 +40,20 @@ AC_DEFUN(jm_INCLUDED_REGEX,
            /* This should succeed, but doesn't for e.g. glibc-2.1.3.  */
            s = re_compile_pattern ("{1", 2, &regex);
 
-           exit (s ? 1 : 0);
+           if (s)
+             exit (1);
+
+           /* The following example is derived from a problem report
+               against gawk from Jorge Stolfi <stolfi@ic.unicamp.br>.  */
+           s = re_compile_pattern ("[anù]*n", 7, &regex);
+           if (s)
+             exit (1);
+
+           /* This should match, but doesn't for e.g. glibc-2.2.1.  */
+           if (re_match (&regex, "an", 2, 0, &regs) != 2)
+             exit (1);
+
+           exit (0);
          }
        ],
               jm_cv_func_working_re_compile_pattern=yes,