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fixes #20572 (#20585)

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* fixes #20572

* added a test case
This commit is contained in:
Andreas Rumpf 2022-10-17 23:48:51 +02:00 • committed by GitHub
commit 81087c949f
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25 changed files with 116 additions and 70 deletions
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compiler/lambdalifting.nim
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@ -782,7 +782,7 @@ proc liftCapturedVars(n: PNode; owner: PSym; d: var DetectionPass;
n[1] = liftCapturedVars(n[1], owner, d, c)
if n[1].kind == nkClosure: result = n[1]
of nkReturnStmt:
if n[0].kind in {nkAsgn, nkFastAsgn}:
if n[0].kind in {nkAsgn, nkFastAsgn, nkSinkAsgn}:
# we have a `result = result` expression produced by the closure
# transform, let's not touch the LHS in order to make the lifting pass
# correct when `result` is lifted