PPrint derivation fails with nested class definitions

[alexarchambault]

REPL session with Ammonite 0.2.7:

@ object ODef { case class Foo(i: Int, s: String) }
defined object ODef
@ ODef.Foo(2, "ba") // Nested in object, succeeds
res1: cmd0.ODef.Foo = Foo(2, "ba")

@ class CDef { case class Foo(i: Int, s: String) }
defined class CDef
@ object CDef extends CDef
defined object CDef
@ CDef.Foo(2, "ba") // Nested in class implemented by object, fails
Compilation Failed
Main.scala:26: could not find implicit value for evidence parameter of type ammonite.pprint.PPrint[cmd3.CDef.Foo]
          def $main() = {Iterator(ReplBridge.shell.shellPPrint(res4, "res4")) ++ Iterator(" = ") ++ ammonite.pprint.PPrint(res4)}
                                                                                                                          ^

This can be reproduced out of the Ammonite REPL, see https://gist.github.com/alexarchambault/90f79a160eca9a9e6932.

Note that contrary to Ammonite macros, shapeless Generic succeeds in these two cases (in the gist too).

[lihaoyi]

Fixed by c57eedd

[alexarchambault]

Great, thanks!