'can not find symbol' for local class + interface method returning the local class

[CeylonMigrationBot]

[@jpragey] Compiling:

shared void run() {
    interface I {
        shared formal A a();
    }
    class A() satisfies I {
        shared actual A a() => nothing;
    }
}

causes:

$ ceylon compile
source/bug/run.ceylon:8: warning: expression has type 'Nothing'
        shared actual A a() => nothing;
                               ^
source/bug/run.ceylon:5: error: cannot find symbol
        shared formal A a();
               ^
  symbol:   class A
  location: interface run$I_
Note: Created module bug/1.0.0
ceylon compile: There was 1 error

Compilation is OK if A and I are member or external class/interface.

[Migrated from ceylon/ceylon-compiler#2275]

[CeylonMigrationBot]

[@sgalles] could this be a dup of #2185 ?

[CeylonMigrationBot]

[@tombentley] Well it's a better match for #2212 I think, which we've marked for 1.3, so I'm going to defer this one to 1.3 also.