SerializationProxy pattern in SBT: j.u.TreeMap vs s.c.i.List

```
> test:run
[info] Compiling 1 Scala source to /Users/jason/code/minimized-list-serialization/target/scala-2.11.7-342e71e-SNAPSHOT/test-classes...
[info] Running issue.Test
--------------------------------------------------------------------------------
URLClassLoader with NativeCopyLoader with RawResources(
  urls = List(/Users/jason/code/minimized-list-serialization/target/scala-2.11.7-342e71e-SNAPSHOT/test-classes, /Users/jason/code/minimized-list-serialization/target/scala-2.11.7-342e71e-SNAPSHOT/classes, /Users/jason/.ivy2/cache/org.scala-lang/scala-library/jars/scala-library-2.11.7-342e71e-SNAPSHOT.jar),
  parent = java.net.URLClassLoader@483b0e70,
  resourceMap = Set(app.class.path, boot.class.path),
  nativeTemp = /var/folders/s2/g6fgtpk52hl8njjvx8vyzr9r0000gn/T/sbt_750f428b
) (class sbt.classpath.ClasspathUtilities$$anon$1)
file:/Users/jason/code/minimized-list-serialization/target/scala-2.11.7-342e71e-SNAPSHOT/test-classes/
file:/Users/jason/code/minimized-list-serialization/target/scala-2.11.7-342e71e-SNAPSHOT/classes/
file:/Users/jason/.ivy2/cache/org.scala-lang/scala-library/jars/scala-library-2.11.7-342e71e-SNAPSHOT.jar

java.net.URLClassLoader@483b0e70 (class java.net.URLClassLoader)
file:/Users/jason/.ivy2/cache/org.scala-lang/scala-library/jars/scala-library-2.11.7-342e71e-SNAPSHOT.jar
file:/Users/jason/.ivy2/cache/org.scala-lang/scala-compiler/jars/scala-compiler-2.11.7-342e71e-SNAPSHOT.jar
file:/Users/jason/.ivy2/cache/org.scala-lang/scala-reflect/jars/scala-reflect-2.11.7-342e71e-SNAPSHOT.jar
file:/Users/jason/.ivy2/cache/org.scala-lang.modules/scala-xml_2.11/bundles/scala-xml_2.11-1.0.3.jar
file:/Users/jason/.ivy2/cache/org.scala-lang.modules/scala-parser-combinators_2.11/bundles/scala-parser-combinators_2.11-1.0.3.jar
file:/Users/jason/.ivy2/cache/jline/jline/jars/jline-2.12.1.jar

xsbt.boot.BootFilteredLoader@2b1cd346 (class xsbt.boot.BootFilteredLoader)

sun.misc.Launcher$AppClassLoader@2503dbd3 (class sun.misc.Launcher$AppClassLoader)
file:/usr/local/Cellar/sbt/0.13.7/libexec/sbt-launch.jar

sun.misc.Launcher$ExtClassLoader@5cea6cde (class sun.misc.Launcher$ExtClassLoader)
file:/Library/Java/JavaVirtualMachines/jdk1.8.0_25.jdk/Contents/Home/jre/lib/ext/cldrdata.jar
file:/Library/Java/JavaVirtualMachines/jdk1.8.0_25.jdk/Contents/Home/jre/lib/ext/dnsns.jar
file:/Library/Java/JavaVirtualMachines/jdk1.8.0_25.jdk/Contents/Home/jre/lib/ext/jfxrt.jar
file:/Library/Java/JavaVirtualMachines/jdk1.8.0_25.jdk/Contents/Home/jre/lib/ext/localedata.jar
file:/Library/Java/JavaVirtualMachines/jdk1.8.0_25.jdk/Contents/Home/jre/lib/ext/nashorn.jar
file:/Library/Java/JavaVirtualMachines/jdk1.8.0_25.jdk/Contents/Home/jre/lib/ext/sunec.jar
file:/Library/Java/JavaVirtualMachines/jdk1.8.0_25.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar
file:/Library/Java/JavaVirtualMachines/jdk1.8.0_25.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar
file:/Library/Java/JavaVirtualMachines/jdk1.8.0_25.jdk/Contents/Home/jre/lib/ext/zipfs.jar
file:/System/Library/Java/Extensions/AppleScriptEngine.jar
file:/System/Library/Java/Extensions/dns_sd.jar
file:/System/Library/Java/Extensions/j3daudio.jar
file:/System/Library/Java/Extensions/j3dcore.jar
file:/System/Library/Java/Extensions/j3dutils.jar
file:/System/Library/Java/Extensions/jai_codec.jar
file:/System/Library/Java/Extensions/jai_core.jar
file:/System/Library/Java/Extensions/libAppleScriptEngine.jnilib
file:/System/Library/Java/Extensions/libJ3D.jnilib
file:/System/Library/Java/Extensions/libJ3DAudio.jnilib
file:/System/Library/Java/Extensions/libJ3DUtils.jnilib
file:/System/Library/Java/Extensions/libmlib_jai.jnilib
file:/System/Library/Java/Extensions/mlibwrapper_jai.jar
file:/System/Library/Java/Extensions/MRJToolkit.jar
file:/System/Library/Java/Extensions/vecmath.jar
file:/usr/lib/java/libjdns_sd.jnilib
--------------------------------------------------------------------------------
{a=Meh(ay), b=Meh(bee)} : Success(true)
List(Meh(2345)) : Failure(java.lang.ClassNotFoundException: issue.Meh)
[success] Total time: 1 s, completed 09/04/2015 2:57:33 PM
```

Author: retronym

.gitignore

@@ -0,0 +1,2 @@
+/target
+/project/target

build.sbt

@@ -1,7 +1,7 @@
 name := "minimized-list-serialization"
 
-scalaVersion := "2.10.5"
+scalaVersion := "2.11.7-342e71e-SNAPSHOT"
 
-libraryDependencies += "org.scalatest" %% "scalatest" % "2.2.4"
+// libraryDependencies += "org.scalatest" %% "scalatest" % "2.2.4"
 
 //fork in Test := true

project/build.properties

@@ -1 +1 @@
-sbt.version=0.13.8-RC1
+sbt.version=0.13.7

src/main/scala/issue/Issue.scala

@@ -2,4 +2,4 @@ package issue
 
 case class Meh(s: String)
 
-case class Issue(n: String, list: List[Meh])
+case class Issue(n: String, list: Any)

src/test/scala/issue/IssueTest.scala

@@ -1,27 +1,54 @@
 package issue
 
-import org.scalatest._
 import java.io.{ObjectOutputStream, ObjectInputStream, ByteArrayOutputStream, ByteArrayInputStream}
+import java.net.URLClassLoader
+import java.util
+import java.util.Comparator
 
-class IssueTest extends FunSuite with Matchers {
-  test("serialization issue") {
-    val obj = Issue("meh", List(Meh("2345")))
-    val arr = serialize(obj)
-    val obj2 = deserialize(arr)
-    assert(obj === obj2)
-  }
+object Test {
+  def main(args: Array[String]): Unit = {
+    classloaderDiagnostic()
+
+    val treeMap = new util.TreeMap[String, Meh]()
+    treeMap.put("a", new Meh("ay"))
+    treeMap.put("b", new Meh("bee"))
+    test(treeMap)
 
+    val list = List(Meh("2345"))
+    test(List(Meh("2345")))
+  }
+  def test(obj: Any) = {
+    val result = scala.util.Try {
+      val arr = serialize(obj)
+      val obj2 = deserialize[Any](arr)
+      obj == obj2
+    }
+    println(s"$obj : $result")
+  }
 
-  def serialize[A <: Serializable](obj: A): Array[Byte] = {
+  def serialize[A](obj: A): Array[Byte] = {
     val o = new ByteArrayOutputStream()
     val os = new ObjectOutputStream(o)
     os.writeObject(obj)
     o.toByteArray()
   }
 
-  def deserialize[A <: Serializable](bytes: Array[Byte]): A = {
+  def deserialize[A](bytes: Array[Byte]): A = {
     val s = new ByteArrayInputStream(bytes)
     val is = new ObjectInputStream(s)
     is.readObject().asInstanceOf[A]
   }
+
+  def classloaderDiagnostic(): Unit = {
+    def classLoaderChain(loader: ClassLoader) = collection.Iterator.iterate(loader)(_.getParent).takeWhile(_ != null)
+    def showLoader(cl: ClassLoader) = {
+      cl.toString + " (" + cl.getClass + ")\n" + {
+        cl match {
+          case url: URLClassLoader => url.getURLs.mkString("\n")
+          case _ => ""
+        }
+      }
+    }
+    println(classLoaderChain(classOf[Meh].getClassLoader).toList.map(showLoader).mkString("-" * 80 + "\n", "\n\n", "\n" + ("-" * 80)))
+  }
 }