[3.6] bpo-31588: Validate return value of __prepare__() methods (GH-3764)#3790
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…onGH-3764) Class execution requires that __prepare__() methods return a proper execution namespace. Check for that immediately after calling __prepare__(), rather than passing it through to the code execution machinery and potentially triggering SystemError (in debug builds) or a cryptic TypeError (in release builds). Patch by Oren Milman. (cherry picked from commit 5837d04)
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Thanks, @ncoghlan! |
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Class execution requires that prepare() methods return
a proper execution namespace. Check for that immediately
after calling prepare(), rather than passing it through
to the code execution machinery and potentially triggering
SystemError (in debug builds) or a cryptic TypeError
(in release builds).
Patch by Oren Milman.
(cherry picked from commit 5837d04)
https://bugs.python.org/issue31588