Merge pull request #4617 from retronym/ticket/9387

SI-9387 Fix VerifyError introduced by indylambda

4 files changed, 39 insertions, 1 deletions

diff --git a/src/compiler/scala/tools/nsc/backend/jvm/BCodeBodyBuilder.scala b/src/compiler/scala/tools/nsc/backend/jvm/BCodeBodyBuilder.scala
index 063fb81d46..22ac8f84d4 100644
--- a/src/compiler/scala/tools/nsc/backend/jvm/BCodeBodyBuilder.scala
+++ b/src/compiler/scala/tools/nsc/backend/jvm/BCodeBodyBuilder.scala
@@ -632,10 +632,11 @@ abstract class BCodeBodyBuilder extends BCodeSkelBuilder {
             case _ =>
               abort(s"Cannot instantiate $tpt of kind: $generatedType")
           }
-        case Apply(_, args) if app.hasAttachment[delambdafy.LambdaMetaFactoryCapable] =>
+        case Apply(fun, args) if app.hasAttachment[delambdafy.LambdaMetaFactoryCapable] =>
           val attachment = app.attachments.get[delambdafy.LambdaMetaFactoryCapable].get
           genLoadArguments(args, paramTKs(app))
           genInvokeDynamicLambda(attachment.target, attachment.arity, attachment.functionalInterface)
+          generatedType = asmMethodType(fun.symbol).returnType
 
         case Apply(fun @ _, List(expr)) if currentRun.runDefinitions.isBox(fun.symbol) =>
           val nativeKind = tpeTK(expr)
diff --git a/test/files/run/t9387.scala b/test/files/run/t9387.scala
new file mode 100644
index 0000000000..3e33d19fd2
--- /dev/null
+++ b/test/files/run/t9387.scala
@@ -0,0 +1,20 @@
+class G[T]
+object G {
+  def v[T](x: T): G[T] = null
+}
+
+class A[T]
+object A {
+  def apply[T](x: => G[T]): A[T] = null
+}
+
+object T {
+  A[Unit](G.v(() => ())) // Was VerifyError
+}
+
+object Test {
+  def main(args: Array[String]): Unit = {
+    T
+  }
+
+}
\ No newline at end of file
diff --git a/test/files/run/t9387b.check b/test/files/run/t9387b.check
new file mode 100644
index 0000000000..6a452c185a
--- /dev/null
+++ b/test/files/run/t9387b.check
@@ -0,0 +1 @@
+()
diff --git a/test/files/run/t9387b.scala b/test/files/run/t9387b.scala
new file mode 100644
index 0000000000..6339f4caba
--- /dev/null
+++ b/test/files/run/t9387b.scala
@@ -0,0 +1,16 @@
+object T {
+  val f: Unit = () => ()
+  println(f)
+}
+
+object U {
+  def f[T](t: T): T = t
+  f[Unit](() => ())
+}
+
+object Test {
+  def main(args: Array[String]): Unit = {
+    T
+    U
+  }
+}