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fixes #20958; fixes the return type of slice function [backport] (#20959)

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* fixes #20958; fixes the return type of slice function

* add a testcase
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ringabout 2022-11-29 14:21:44 +08:00 • committed by GitHub
commit 3d5edb41be
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compiler/semparallel.nim
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@ -402,6 +402,9 @@ proc transformSlices(g: ModuleGraph; idgen: IdGenerator; n: PNode): PNode =
let op = n[0].sym
if op.name.s == "[]" and op.fromSystem:
result = copyNode(n)
var typ = newType(tyOpenArray, nextTypeId(g.idgen), result.typ.owner)
typ.add result.typ[0]
result.typ = typ
let opSlice = newSymNode(createMagic(g, idgen, "slice", mSlice))
opSlice.typ = getSysType(g, n.info, tyInt)
result.add opSlice