(docolon): Set re_syntax_options to RE_SYNTAX_POSIX_BASIC

so expr's pattern matching uses BASIC (not GNU-extended) REs.
Reported by Jim Kingdon.

diff --git a/src/expr.c b/src/expr.c
index 0be997e082ae2520ff624ec2c08b5e46349b3f30..c984279bc515b10baac1afac37d3cd4cde4d17d4 100644 (file)
--- a/src/expr.c
+++ b/src/expr.c
@@ -423,6 +423,7 @@ docolon (VALUE *sv, VALUE *pv)
   re_buffer.allocated = 2 * len;
   re_buffer.buffer = (unsigned char *) xmalloc (re_buffer.allocated);
   re_buffer.translate = 0;
+  re_syntax_options = RE_SYNTAX_POSIX_BASIC;
   errmsg = re_compile_pattern (pv->u.s, len, &re_buffer);
   if (errmsg)
     error (2, 0, "%s", errmsg);