From a113208a0643263fdd7198238bf9213f9148bc1a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= <adrian@chaves.io>
Date: Fri, 24 Nov 2023 11:35:15 +0100
Subject: [PATCH] Fix BytesIO non-emptiness check

---
 scrapy/utils/gz.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scrapy/utils/gz.py b/scrapy/utils/gz.py
index cf7316e82..2e487d88b 100644
--- a/scrapy/utils/gz.py
+++ b/scrapy/utils/gz.py
@@ -23,7 +23,7 @@ def gunzip(data: bytes, *, max_size: int = 0) -> bytes:
             # complete only if there is some data, otherwise re-raise
             # see issue 87 about catching struct.error
             # some pages are quite small so output_stream is empty
-            if output_stream:
+            if output_stream.getbuffer().nbytes > 0:
                 break
             raise
         decompressed_size += len(chunk)