[issue45126] [sqlite3] cleanup and harden Connection and Cursor __init__

[Dong-hee Na]

Dong-hee Na <donghee.na at python.org> added the comment:


New changeset aa6dd54d43dffbdf883c083e361f6ccf8642d66e by Erlend Egeberg Aasland in branch '3.10':
[3.10] bpo-45126: Fix ref. leak in `sqlite3.Connection.__init__` (GH-28231). (GH-28298)
https://github.com/python/cpython/commit/aa6dd54d43dffbdf883c083e361f6ccf8642d66e


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<https://bugs.python.org/issue45126>
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