Fix the interface flag when re-writing a closure call to the body method

When re-writing a closure invocation to the body method, the `itf` flag
of the invocation instruction was incorrect: it needs to be true if
the method is defined in an interface (including static methdos), not
if the method is invoked through `INVOKEINTERFACE`.

JDK 8 doesn't flag this inconsistency and executes the bytecode, but the
verifier in JDK 9 throws an `IncompatibleClassChangeError`.

Similar fixes went into e619b03.

1 files changed, 13 insertions, 0 deletions

diff --git a/test/files/run/sd242.scala b/test/files/run/sd242.scala
new file mode 100644
index 0000000000..acd51ec893
--- /dev/null
+++ b/test/files/run/sd242.scala
@@ -0,0 +1,13 @@
+trait T {
+  def test: Unit = {
+    byName("".toString)
+    ()
+  }
+
+  @inline
+  final def byName(action: => Unit) = action
+}
+
+object Test extends App {
+  (new T {}).test
+}