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test_changing_value is giving inconsistent results when the _winreg.c patch is not applied. It mostly fails on QueryValue, sometimes on EnumValue, and about 1/10 times the test does not fail at all. Ideally the tests should not use threads -- can the same thing be tested without a thread? It seems like the issue isn't related to concurrency, but maybe I missed something.
With _winreg.c patched, the tests seem to pass, but I haven't run that as much as I have the unpatched version.
winreg_test.pach
- test_changing_value (assuming we need do this as a thread)
-- I'd just use HKEY_CURRENT_USER directly instead of storing it locally
-- done doesn't need to be a list, it could just be the True/False
-- the if/else could be shortened to `s = "x" if short else "x"*2000`
- test_long_key
-- After SetValue I'd just call EnumKey(key, 0) since you can only ever have that value to use. The loop isn't really used.