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author | Lukas Rytz <lukas.rytz@typesafe.com> | 2015-02-03 12:46:58 +0100 |
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committer | Lukas Rytz <lukas.rytz@typesafe.com> | 2015-02-03 12:46:58 +0100 |
commit | b6058387007f0326009737fa29747ffbc322447c (patch) | |
tree | edc642cb51f30f0acded58892ee0f0a1c75ef688 /src | |
parent | fdb3d96409033ea0b15a37118c423618ac00acb5 (diff) | |
parent | 286dafbd45caa2b85f8113845105aaaec98be71a (diff) | |
download | scala-b6058387007f0326009737fa29747ffbc322447c.tar.gz scala-b6058387007f0326009737fa29747ffbc322447c.tar.bz2 scala-b6058387007f0326009737fa29747ffbc322447c.zip |
Merge pull request #4252 from retronym/ticket/9050
SI-9050 Fix crasher with value classes, recursion
Diffstat (limited to 'src')
-rw-r--r-- | src/reflect/scala/reflect/internal/Trees.scala | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/src/reflect/scala/reflect/internal/Trees.scala b/src/reflect/scala/reflect/internal/Trees.scala index 35de3adff6..ccf907e05d 100644 --- a/src/reflect/scala/reflect/internal/Trees.scala +++ b/src/reflect/scala/reflect/internal/Trees.scala @@ -1576,6 +1576,7 @@ trait Trees extends api.Trees { */ class TreeSymSubstituter(from: List[Symbol], to: List[Symbol]) extends Transformer { val symSubst = new SubstSymMap(from, to) + private var mutatedSymbols: List[Symbol] = Nil override def transform(tree: Tree): Tree = { def subst(from: List[Symbol], to: List[Symbol]) { if (!from.isEmpty) @@ -1594,6 +1595,7 @@ trait Trees extends api.Trees { |TreeSymSubstituter: updated info of symbol ${tree.symbol} | Old: ${showRaw(tree.symbol.info, printTypes = true, printIds = true)} | New: ${showRaw(newInfo, printTypes = true, printIds = true)}""") + mutatedSymbols ::= tree.symbol tree.symbol updateInfo newInfo } case _ => @@ -1613,7 +1615,23 @@ trait Trees extends api.Trees { } else super.transform(tree) } - def apply[T <: Tree](tree: T): T = transform(tree).asInstanceOf[T] + def apply[T <: Tree](tree: T): T = { + val tree1 = transform(tree) + invalidateSingleTypeCaches(tree1) + tree1.asInstanceOf[T] + } + private def invalidateSingleTypeCaches(tree: Tree): Unit = { + if (mutatedSymbols.nonEmpty) + for (t <- tree) + for (tp <- t.tpe) { + tp match { + case s: SingleType if mutatedSymbols contains s.sym => + s.underlyingPeriod = NoPeriod + s.underlyingCache = NoType + case _ => + } + } + } override def toString() = "TreeSymSubstituter/" + substituterString("Symbol", "Symbol", from, to) } |