Fix false unreachable due to opaqueness #19368
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sjrd
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Jan 23, 2024
WojciechMazur
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Jun 28, 2024
Backports #19368 to the LTS branch. PR submitted by the release tooling. [skip ci]
zielinsky
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Oct 7, 2025
fixes: #22513 Currently, if the upper bounds of opaque types are sealed, they pass exhaustivityCheckable, but exhaustivity checks are not handled correctly because the compiler preventing from decomposing them. The guard was introduced in [#19368](#19368), but the tests still pass even without this guard.
tgodzik
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Nov 5, 2025
fixes: scala#22513 Currently, if the upper bounds of opaque types are sealed, they pass exhaustivityCheckable, but exhaustivity checks are not handled correctly because the compiler preventing from decomposing them. The guard was introduced in [scala#19368](scala#19368), but the tests still pass even without this guard. [Cherry-picked f4e6239]
HarrisL2
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Nov 18, 2025
fixes: scala#22513 Currently, if the upper bounds of opaque types are sealed, they pass exhaustivityCheckable, but exhaustivity checks are not handled correctly because the compiler preventing from decomposing them. The guard was introduced in [scala#19368](scala#19368), but the tests still pass even without this guard.
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Fix #19275