signature=f326654ec2c650c08589c4b3d37549aa,Squashed commit of the following:
commit 06145230c833c3db5dab8858e11bcd550a37c57fAuthor: Nick Coghlan Date: Thu Aug 29 23:26:53 2019 +1000bpo-37947: Avoid double-decrement in symtable recursion counting (GH-15593)With `symtable_visi...
