diff options
Diffstat (limited to 'ext')
| -rw-r--r-- | ext/stringio/stringio.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/ext/stringio/stringio.c b/ext/stringio/stringio.c index 96e82ff5c1..99a19ead0d 100644 --- a/ext/stringio/stringio.c +++ b/ext/stringio/stringio.c @@ -698,15 +698,19 @@ strio_eof(VALUE self) static VALUE strio_copy(VALUE copy, VALUE orig) { - struct StringIO *ptr; + struct StringIO *ptr, *old_ptr; + VALUE old_string = Qundef; orig = rb_convert_type(orig, T_DATA, "StringIO", "to_strio"); if (copy == orig) return copy; ptr = StringIO(orig); - if (check_strio(copy)) { - strio_free(DATA_PTR(copy)); + old_ptr = check_strio(copy); + if (old_ptr) { + old_string = old_ptr->string; + strio_free(old_ptr); } DATA_PTR(copy) = ptr; + RB_OBJ_WRITTEN(copy, old_string, ptr->string); RBASIC(copy)->flags &= ~STRIO_READWRITE; RBASIC(copy)->flags |= RBASIC(orig)->flags & STRIO_READWRITE; ++ptr->count; |