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-rw-r--r--compiler/src/dotty/tools/dotc/transform/Erasure.scala4
1 files changed, 3 insertions, 1 deletions
diff --git a/compiler/src/dotty/tools/dotc/transform/Erasure.scala b/compiler/src/dotty/tools/dotc/transform/Erasure.scala
index 71ecb5c65..00abddd91 100644
--- a/compiler/src/dotty/tools/dotc/transform/Erasure.scala
+++ b/compiler/src/dotty/tools/dotc/transform/Erasure.scala
@@ -542,7 +542,9 @@ object Erasure extends TypeTestsCasts{
* to deal with boxing and unboxing of value classes ourselves.
*/
override def typedClosure(tree: untpd.Closure, pt: Type)(implicit ctx: Context) = {
- val implClosure @ Closure(_, meth, _) = super.typedClosure(tree, pt)
+ val xxl = defn.isUnimplementedFunctionClass(tree.typeOpt.typeSymbol)
+ var implClosure @ Closure(_, meth, _) = super.typedClosure(tree, pt)
+ if (xxl) implClosure = cpy.Closure(implClosure)(tpt = TypeTree(defn.FunctionXXLType))
implClosure.tpe match {
case SAMType(sam) =>
val implType = meth.tpe.widen