* string.c (rb_enc_cr_str_buf_cat): fix self appending.

git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@14966 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 3 deletions

diff --git a/string.c b/string.c
index f2371dcf0..c00fa3cd5 100644
--- a/string.c
+++ b/string.c
@@ -1132,9 +1132,6 @@ rb_enc_cr_str_buf_cat(VALUE str, const char *ptr, long len,
         off = ptr - RSTRING_PTR(str);
     }
     rb_str_modify(str);
-    if (off != -1) {
-        ptr = RSTRING_PTR(str) + off;
-    }
     if (len == 0) {
         ENCODING_CODERANGE_SET(str, res_encindex, res_cr);
         return str;
@@ -1156,6 +1153,9 @@ rb_enc_cr_str_buf_cat(VALUE str, const char *ptr, long len,
 	}
 	RESIZE_CAPA(str, capa);
     }
+    if (off != -1) {
+        ptr = RSTRING_PTR(str) + off;
+    }
     memcpy(RSTRING_PTR(str) + RSTRING_LEN(str), ptr, len);
     STR_SET_LEN(str, total);
     RSTRING_PTR(str)[total] = '\0'; // sentinel