[3.9] bpo-1596321: Fix threading._shutdown() for the main thread (GH-28549)#28589

Merged

vstinner merged 1 commit intopython:3.9from vstinner:thread39

Sep 27, 2021

+53-8

Commits on Sep 27, 2021

bpo-1596321 : Fix threading._shutdown() for the main thread (GH-28549 )
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