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fixes #6895

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This commit is contained in:
Andreas Rumpf 2018-04-11 23:26:11 +02:00
commit 4c5351a1eb
2 changed files with 7 additions and 3 deletions
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6
compiler/semtypes.nim
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@ -184,6 +184,10 @@ proc semRangeAux(c: PContext, n: PNode, prev: PType): PType =
checkSonsLen(n, 3)
result = newOrPrevType(tyRange, prev, c)
result.n = newNodeI(nkRange, n.info)
# always create a 'valid' range type, but overwrite it later
# because 'semExprWithType' can raise an exception. See bug #6895.
addSonSkipIntLit(result, errorType(c))
if (n[1].kind == nkEmpty) or (n[2].kind == nkEmpty):
localError(n.info, errRangeIsEmpty)
@ -216,7 +220,7 @@ proc semRangeAux(c: PContext, n: PNode, prev: PType): PType =
if weakLeValue(result.n[0], result.n[1]) == impNo:
localError(n.info, errRangeIsEmpty)
addSonSkipIntLit(result, rangeT[0])
result[0] = rangeT[0]
proc semRange(c: PContext, n: PNode, prev: PType): PType =
result = nil