* io.c (read_all): use the given buffer to read when needs readconv.

  based on the patch by wanabe <s.wanabe AT gmail.com> at
  [ruby-dev:36931].


git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@19943 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/io.c b/io.c
index bfeefef43..125180b92 100644
--- a/io.c
+++ b/io.c
@@ -1556,7 +1556,7 @@ read_all(rb_io_t *fptr, long siz, VALUE str)
     int cr;
 
     if (NEED_READCONV(fptr)) {
-        VALUE str = rb_str_new(NULL, 0);
+        if (!NIL_P(str)) rb_str_set_len(str, 0);
         make_readconv(fptr);
         while (1) {
             if (fptr->cbuf_len) {