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Disable promotions when restricting types in isinstance checks - #6142
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Argh the test failure is the windows IPC flake, merging |
Michael0x2a
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This pull request reverts python#6114 and python#6142: see python#6180 for rationale. In short, the original fix ended up being more disruptive then anticipated: it's modifying str and unicode semantics, and we should put a little more thought into reasoning about that particular case before moving ahead with any fix here. This should also help unblock the upcoming 0.660 release.
Michael0x2a
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Jan 11, 2019
This pull request reverts #6114 and #6142: see #6180 for rationale. In short, the original fix ended up being more disruptive then anticipated: it's modifying str and unicode semantics, and we should put a little more thought into reasoning about that particular case before moving ahead with any fix here. This should also help unblock the upcoming 0.660 release.
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This fixes a bug left behind by #6114, where too much would get
subtracted out of a union type after an isinstance.
Fixes #6141.