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fix range to unsigned conversion (#17754)

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Tanguy Cizain 2021-04-17 15:34:00 +02:00 • committed by GitHub
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2 changed files with 13 additions and 1 deletions
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compiler/sigmatch.nim
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@ -409,7 +409,7 @@ proc handleRange(f, a: PType, min, max: TTypeKind): TTypeRelation =
elif a.kind == tyRange and
# Make sure the conversion happens between types w/ same signedness
(f.kind in {tyInt..tyInt64} and a[0].kind in {tyInt..tyInt64} or
f.kind in {tyUInt8..tyUInt32} and a[0].kind in {tyUInt8..tyInt32}) and
f.kind in {tyUInt8..tyUInt32} and a[0].kind in {tyUInt8..tyUInt32}) and
a.n[0].intVal >= firstOrd(nil, f) and a.n[1].intVal <= lastOrd(nil, f):
# passing 'nil' to firstOrd/lastOrd here as type checking rules should
# not depend on the target integer size configurations!