https://git.ruby-lang.org/ruby.git/commit/?id=929a4aa722

From 929a4aa722524f4567eed0d8b27d644f912c22f7 Mon Sep 17 00:00:00 2001
From: Nobuyoshi Nakada <nobu@r...>
Date: Tue, 5 Nov 2019 02:02:14 +0900
Subject: Adjust a fucntion signature


diff --git a/ext/zlib/zlib.c b/ext/zlib/zlib.c
index 2d93819..23466d1 100644
--- a/ext/zlib/zlib.c
+++ b/ext/zlib/zlib.c
@@ -4277,13 +4277,19 @@ rb_gzreader_external_encoding(VALUE self) https://github.com/ruby/ruby/blob/trunk/ext/zlib/zlib.c#L4277
 }
 
 static VALUE
-zlib_gzip_ensure(VALUE arg)
+zlib_gzip_end_rescue(VALUE arg)
 {
     struct gzfile *gz = (struct gzfile *)arg;
-    rb_rescue((VALUE(*)())gz->end, arg, NULL, Qnil);
+    gz->end(gz);
     return Qnil;
 }
 
+static VALUE
+zlib_gzip_ensure(VALUE arg)
+{
+    return rb_rescue(zlib_gzip_end_rescue, arg, NULL, Qnil);
+}
+
 static void
 zlib_gzip_end(struct gzfile *gz)
 {
-- 
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