* re.c (rb_reg_to_s): suppress duplicated charclass warning.

  Regexp#to_s suppress extra its whole regexp options by calling
  onig_new with its source, but it doesn't call rb_reg_preprocess.
  Therefore its Unicode escapes (\u{XXXX}) are given as is,
  and it may cause duplicated charclass warning for example
  "[\u{33}]" (3 is duplicated) or "[\u{a}\u{b}]" (u is duplicated).
  [ruby-core:53649] [Bug #8151]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@40063 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 0 deletions

diff --git a/re.c b/re.c
index 91d34eb0cd..16d7e3450c 100644
--- a/re.c
+++ b/re.c
@@ -571,12 +571,15 @@ rb_reg_to_s(VALUE re)
 	}
 	if (*ptr == ':' && ptr[len-1] == ')') {
 	    Regexp *rp;
+	    VALUE verbose = ruby_verbose;
+	    ruby_verbose = Qfalse;
 
 	    ++ptr;
 	    len -= 2;
             err = onig_new(&rp, ptr, ptr + len, ONIG_OPTION_DEFAULT,
 			   enc, OnigDefaultSyntax, NULL);
 	    onig_free(rp);
+	    ruby_verbose = verbose;
 	}
 	if (err) {
 	    options = RREGEXP(re)->ptr->options;