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improve error message when using toTask with a call with a return value (#20622)

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ringabout 2022-10-23 14:27:34 +08:00 • committed by GitHub
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lib/std/tasks.nim
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@ -110,7 +110,8 @@ macro toTask*(e: typed{nkCall | nkInfix | nkPrefix | nkPostfix | nkCommand | nkC
let b = toTask hello(13)
assert b is Task
doAssert getTypeInst(e).typeKind == ntyVoid
if getTypeInst(e).typeKind != ntyVoid:
error("'toTask' cannot accept a call with a return value", e)
when compileOption("threads"):
if not isGcSafe(e[0]):