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Fix jsgen bug with uninitialized seq (#12500) [backport]

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Oscar Nihlgård 2019-10-24 11:17:01 +02:00 • committed by Andreas Rumpf
commit 4ac100c912
2 changed files with 21 additions and 1 deletions
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compiler/jsgen.nim
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@ -1169,7 +1169,7 @@ proc genArrayAddr(p: PProc, n: PNode, r: var TCompRes) =
first = firstOrd(p.config, typ.sons[0])
if optBoundsCheck in p.options:
useMagic(p, "chckIndx")
r.res = "chckIndx($1, $2, $3.length+$2-1)-$2" % [b.res, rope(first), tmp]
r.res = "chckIndx($1, $2, ($3 != null ? $3.length : 0)+$2-1)-$2" % [b.res, rope(first), tmp]
elif first != 0:
r.res = "($1)-$2" % [b.res, rope(first)]
else: