Techatrix ec358d6db5 sema: fix safe integer arithmetic operations on undefined values
Previously `@as(i64, undefined) +% 1` would produce `@as(@TypeOf(undefined), undefined)` which now gives `@as(i64, undefined)`.
Previously `@as(i64, undefined) +| 1` would hit an assertion which now gives `@as(i64, undefined)`.
2024-01-16 16:27:31 -08:00
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