Ethan Furman <[email protected]> added the comment:
That is an intentional change. The cause is that the masks include bits that
are not named in the Flag.
The user-side fix is to add a `boundary=KEEP` option to the flag:
class GeodIntermediateFlag(IntFlag, boundary=KEEP)
The enum library fix could be one of two things:
- automatically use the KEEP boundary when these conditions arise, and issue a
DeprecationWarning; or
- lose that particular check.
I'm inclined to go with option 2, since `boundary` is designed to answer the
question of what to do when Flag.A | Flag.B does not exist in Flag.
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<https://bugs.python.org/issue44242>
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