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[backport] TreeUnpickler: fix cycle involving param accessor #12873

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Merged
merged 1 commit into from
Jun 21, 2021
Merged

[backport] TreeUnpickler: fix cycle involving param accessor #12873

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7 changes: 6 additions & 1 deletion compiler/src/dotty/tools/dotc/core/tasty/TreeUnpickler.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -881,7 +881,12 @@ class TreeUnpickler(reader: TastyReader,
}
goto(end)
setSpan(start, tree)
if (!sym.isType) // Only terms might have leaky aliases, see the documentation of `checkNoPrivateLeaks`

// Dealias any non-accessible type alias in the type of `sym`. This can be
// skipped for types (see `checkNoPrivateLeaks` for why) as well as for
// param accessors since they can't refer to an inaccesible type member of
// the class.
if !sym.isType && !sym.is(ParamAccessor) then
sym.info = ta.avoidPrivateLeaks(sym)

if (ctx.settings.YreadComments.value) {
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2 changes: 2 additions & 0 deletions tests/pos/i12834.scala
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@@ -0,0 +1,2 @@
class A(val ref: Option[B])
class B extends A(None)