added test for bug #648

2 files changed, 18 insertions, 0 deletions

diff --git a/test/files/neg/bug648.check b/test/files/neg/bug648.check
new file mode 100644
index 0000000000..80a4e11213
--- /dev/null
+++ b/test/files/neg/bug648.check
@@ -0,0 +1,4 @@
+bug648.scala:7 error: value newAcc escapes its defining scope as part of type newAcc.type
+      List[Symbol]() map { sym =>
+                               ^
+one error found
diff --git a/test/files/neg/bug648.scala b/test/files/neg/bug648.scala
new file mode 100644
index 0000000000..6d10800795
--- /dev/null
+++ b/test/files/neg/bug648.scala
@@ -0,0 +1,14 @@
+import scala.tools.nsc.transform.Transform
+
+abstract class Detach extends Transform {
+  import global._
+  class DetachTransformer extends Transformer {
+    def foo: Scope = new Scope(
+      List[Symbol]() map { sym =>
+        val newAcc = sym.cloneSymbol
+        // def setFlag(mask: long): this.type
+        newAcc.setFlag(0)
+      }
+    )
+  }
+}