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fixes #14498 [backport:1.2] (#14503)

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Andreas Rumpf 2020-05-30 15:32:31 +02:00 • committed by GitHub
commit 7ccc7d7e93
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4 changed files with 26 additions and 6 deletions
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compiler/semexprs.nim
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@ -1712,7 +1712,7 @@ proc semAsgn(c: PContext, n: PNode; mode=asgnNormal): PNode =
if le == nil:
localError(c.config, a.info, "expression has no type")
elif (skipTypes(le, {tyGenericInst, tyAlias, tySink}).kind != tyVar and
isAssignable(c, a) == arNone) or
isAssignable(c, a) in {arNone, arLentValue}) or
skipTypes(le, abstractVar).kind in {tyOpenArray, tyVarargs}:
# Direct assignment to a discriminant is allowed!
localError(c.config, a.info, errXCannotBeAssignedTo %