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VersionConstraint.intersection can throw TypeError in some cases #2608
Description
the VersionConstraint.intersection factory casts all the intersections a.intersect(b) to a VersionRange:
but the intersect method will sometimes return an empty range (_EmptyVersion), which is not a subtype of VersionRange, so you get a TypeError
Activity
agam1092005 commentedon Sep 30, 2026
I investigated this and confirmed the TypeError occurs because VersionConstraint.intersection() casts every result of intersect() to VersionRange, while intersections can return _EmptyVersion, Version, or VersionUnion.
I’m thinking of changing the local variable to VersionConstraint, returning early when the result is empty, and adding tests for disjoint ranges and single-version intersections.
Would this approach be acceptable?
@ardera @lrhn