I installed this:
2006-04-13 Paul Eggert <[EMAIL PROTECTED]>
* lib/regex.h (RE_DUP_MAX): Update comment to match current
implementation.
--- lib/regex.h 10 Apr 2006 06:43:33 -0000 1.36
+++ lib/regex.h 13 Apr 2006 22:14:12 -0000 1.37
@@ -322,7 +322,14 @@ extern reg_syntax_t re_syntax_options;
# ifdef RE_DUP_MAX
# undef RE_DUP_MAX
# endif
-/* If sizeof(int) == 2, then ((1 << 15) - 1) overflows. */
+
+/* RE_DUP_MAX is 2**15 - 1 because an earlier implementation stored
+ the counter as a 2-byte signed integer. This is no longer true, so
+ RE_DUP_MAX could be increased to (INT_MAX / 10 - 1), or to
+ ((SIZE_MAX - 2) / 10 - 1) if _REGEX_LARGE_OFFSETS is defined.
+ However, there would be a huge performance problem if someone
+ actually used a pattern like a\{214748363\}, so RE_DUP_MAX retains
+ its historical value. */
# define RE_DUP_MAX (0x7fff)
#endif /* defined __USE_GNU_REGEX */
