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-rw-r--r--ext/zlib/zlib.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/ext/zlib/zlib.c b/ext/zlib/zlib.c
index f52248cf47..98141b2f3f 100644
--- a/ext/zlib/zlib.c
+++ b/ext/zlib/zlib.c
@@ -610,7 +610,8 @@ zstream_append_input(z, src, len)
}
#define zstream_append_input2(z,v)\
- zstream_append_input((z), RSTRING(v)->ptr, RSTRING(v)->len)
+ RB_GC_GUARD(v),\
+ zstream_append_input((z), (Bytef*)RSTRING_PTR(v), RSTRING_LEN(v))
static void
zstream_discard_input(z, len)