From 62a00812669aa0906aa0d4e9a4c2e87be3b74975 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Adri=C3=A1n=20Chaves?= Date: Mon, 7 Mar 2022 12:00:44 +0100 Subject: [PATCH] engine: prevent slot method call after unsetting the slot --- scrapy/core/engine.py | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/scrapy/core/engine.py b/scrapy/core/engine.py index f9de7ee23..6602f661d 100644 --- a/scrapy/core/engine.py +++ b/scrapy/core/engine.py @@ -136,7 +136,9 @@ class ExecutionEngine: self.paused = False def _next_request(self) -> None: - assert self.slot is not None # typing + if self.slot is None: + return + assert self.spider is not None # typing if self.paused: @@ -184,7 +186,8 @@ class ExecutionEngine: d.addErrback(lambda f: logger.info('Error while removing request from slot', exc_info=failure_to_exc_info(f), extra={'spider': self.spider})) - d.addBoth(lambda _: self.slot.nextcall.schedule()) + slot = self.slot + d.addBoth(lambda _: slot.nextcall.schedule()) d.addErrback(lambda f: logger.info('Error while scheduling new request', exc_info=failure_to_exc_info(f), extra={'spider': self.spider}))