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-rw-r--r--qutebrowser/browser/webengine/tabhistory.py4
1 files changed, 3 insertions, 1 deletions
diff --git a/qutebrowser/browser/webengine/tabhistory.py b/qutebrowser/browser/webengine/tabhistory.py
index 30f3facdb..2848142ef 100644
--- a/qutebrowser/browser/webengine/tabhistory.py
+++ b/qutebrowser/browser/webengine/tabhistory.py
@@ -153,6 +153,8 @@ def serialize(items):
for item in items:
_serialize_item(item, stream)
- stream.device().reset()
+ dev = stream.device()
+ assert dev is not None
+ dev.reset()
qtutils.check_qdatastream(stream)
return stream, data, cur_user_data