SI-4625 Warn when discarding script object

It's pretty confusing when your script object becomes a local
and then nothing happens. Such as when you're writing a test and
it takes forever to figure out what's going on.

1 files changed, 7 insertions, 0 deletions

diff --git a/test/files/run/t4625c.scala b/test/files/run/t4625c.scala
new file mode 100644
index 0000000000..44f6225220
--- /dev/null
+++ b/test/files/run/t4625c.scala
@@ -0,0 +1,7 @@
+
+import scala.tools.partest.ScriptTest
+
+object Test extends ScriptTest {
+  // must be called Main to get probing treatment in parser
+  override def testmain = "Main"
+}