diff options
Diffstat (limited to 'ext/zlib/zlib.c')
-rw-r--r-- | ext/zlib/zlib.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/zlib/zlib.c b/ext/zlib/zlib.c index c0f52c23cc..824dd1324a 100644 --- a/ext/zlib/zlib.c +++ b/ext/zlib/zlib.c @@ -1563,6 +1563,7 @@ rb_deflate_init_copy(VALUE self, VALUE orig) Data_Get_Struct(self, struct zstream, z1); z2 = get_zstream(orig); + if (z1 == z2) return self; err = deflateCopy(&z1->stream, &z2->stream); if (err != Z_OK) { raise_zlib_error(err, 0); |