SI-6412 alleviates leaks in toolboxes

Turns importer caches into fully weak hash maps, and also applies
manual cleanup to toolboxes every time they are used.

It's not enough, because reflection-mem-typecheck test is still leaking
at a rate of ~100kb per typecheck, but it's much better than it was before.
We'll fix the rest later, after 2.10.0-final.

For more information, see https://issues.scala-lang.org/browse/SI-6412 and
http://groups.google.com/group/scala-internals/browse_thread/thread/eabcf3d406dab8b2

1 files changed, 26 insertions, 0 deletions

diff --git a/test/pending/run/reflection-mem-eval.scala b/test/pending/run/reflection-mem-eval.scala
new file mode 100644
index 0000000000..9045c44cd6
--- /dev/null
+++ b/test/pending/run/reflection-mem-eval.scala
@@ -0,0 +1,26 @@
+import scala.tools.partest.MemoryTest
+
+trait A { type T <: A }
+trait B { type T <: B }
+
+object Test extends MemoryTest {
+  lazy val tb = {
+    import scala.reflect.runtime.universe._
+    import scala.reflect.runtime.{currentMirror => cm}
+    import scala.tools.reflect.ToolBox
+    cm.mkToolBox()
+  }
+
+  override def maxDelta = 10
+  override def calcsPerIter = 3
+  override def calc() {
+    var snippet = """
+      trait A { type T <: A }
+      trait B { type T <: B }
+      def foo[T](x: List[T]) = x
+      foo(List(new A {}, new B {}))
+    """.trim
+    snippet = snippet + "\n" + (List.fill(50)(snippet.split("\n").last) mkString "\n")
+    tb.eval(tb.parse(snippet))
+  }
+}
\ No newline at end of file