SI-7992 Fix super-accessor generation after a local class

The transformer in the superaccessors phase uses the var
`validCurrentOwner` to track whether we're in a part of the
code that won't end up in the host method, and as such, will
need to access super-method via a super-accessor.

But, this bit of bookkeeping was not correctly reset after traversing
out of a local class. A `VerifyError` ensued.

This commit changes `atOwner` to save and restore that flag, rather
than leaving it set to `true`.

I've also added a test variation using a by-name argument.

1 files changed, 18 insertions, 0 deletions

diff --git a/test/files/run/t7992b.scala b/test/files/run/t7992b.scala
new file mode 100644
index 0000000000..6fe1f990d5
--- /dev/null
+++ b/test/files/run/t7992b.scala
@@ -0,0 +1,18 @@
+class C {
+  def foo: Int = 0
+}
+
+class E extends C {
+  override def foo: Int = {
+    (None: Option[Int]).getOrElse {
+      class C
+      E.super.foo 
+    }
+  }
+}
+
+object Test {
+  def main(args: Array[String]) {
+    new E().foo
+  }
+}