* string.c (tr_trans): when the hash for multibyte repl is empty,

  tr is inverse mode, and a character doesn't much the table, the
  character should be replaced by last replacement. Bug #4449

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@30977 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/string.c b/string.c
index 23784ab7fe..db8f761a0b 100644
--- a/string.c
+++ b/string.c
@@ -5060,7 +5060,7 @@ tr_trans(VALUE str, VALUE src, VALUE repl, int sflag)
 		else c = NUM2INT(tmp);
 	    }
 	    else {
-		c = errc;
+		c = cflag ? last : errc;
 	    }
 	    if (c != errc) {
 		tlen = rb_enc_codelen(c, enc);