1 files changed, 2 insertions, 6 deletions
diff --git a/string.c b/string.c
index 6e998ee17..4079a8cf4 100644
--- a/string.c
+++ b/string.c
@@ -4538,12 +4538,8 @@ rb_str_chomp_bang(int argc, VALUE *argv, VALUE str)
     if (p[len-1] == newline &&
 	(rslen <= 1 ||
 	 memcmp(RSTRING_PTR(rs), pp, rslen) == 0)) {
-	if (rb_enc_mbmaxlen(enc) > 1) {
-	    while (p < pp) {
-		p += rb_enc_mbclen(p, e, enc);
-	    }
-	    if (p != pp) return Qnil;
-	}
+	if (ONIGENC_LEFT_ADJUST_CHAR_HEAD(enc,p,pp) != (const UChar*)pp)
+	    return Qnil;
 	rb_str_modify(str);
 	STR_SET_LEN(str, RSTRING_LEN(str) - rslen);
 	RSTRING_PTR(str)[RSTRING_LEN(str)] = '\0';