merge revision(s) 55181: [Backport #12431]

	* transcode.c (str_transcode0): scrub in the given encoding when
	  the source encoding is given, not in the encoding of the
	  receiver.  [ruby-core:75732] [Bug #12431]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@55905 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 6 insertions, 2 deletions

diff --git a/string.c b/string.c
index 318acf38ff..d959b0b067 100644
--- a/string.c
+++ b/string.c
@@ -8675,8 +8675,13 @@ str_compat_and_valid(VALUE str, rb_encoding *enc)
 VALUE
 rb_str_scrub(VALUE str, VALUE repl)
 {
+    return rb_enc_str_scrub(STR_ENC_GET(str), str, repl);
+}
+
+VALUE
+rb_enc_str_scrub(rb_encoding *enc, VALUE str, VALUE repl)
+{
     int cr = ENC_CODERANGE(str);
-    rb_encoding *enc;
     int encidx;
     VALUE buf = Qnil;
     const char *rep;
@@ -8686,7 +8691,6 @@ rb_str_scrub(VALUE str, VALUE repl)
     if (ENC_CODERANGE_CLEAN_P(cr))
 	return Qnil;
 
-    enc = STR_ENC_GET(str);
     if (!NIL_P(repl)) {
 	repl = str_compat_and_valid(repl, enc);
 	tainted = OBJ_TAINTED_RAW(repl);