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fix #12521(type alias for openArray) (#17593)

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* fix nim js cmp fails at CT

* fix #12521

* address comments
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flywind 2021-04-19 17:21:35 +08:00 • committed by GitHub
commit 83fa0fc843
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2 changed files with 27 additions and 1 deletions
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compiler/ccgtypes.nim
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@ -453,7 +453,7 @@ proc genProcParams(m: BModule, t: PType, rettype, params: var Rope,
params.add(~"NIM_NOALIAS ")
params.add(param.loc.r)
# declare the len field for open arrays:
var arr = param.typ
var arr = param.typ.skipTypes({tyGenericInst})
if arr.kind in {tyVar, tyLent, tySink}: arr = arr.lastSon
var j = 0
while arr.kind in {tyOpenArray, tyVarargs}: