Pike v7.7 release 13 running Hilfe v3.5 (Incremental Pike Frontend)
ADT.Relation.Binary();
(1) Result: ADT.Relation.Binary(0 0)
object x=_;
Compiler Error: 1:Error comparing constants. Compiler Exception: C stack overflow. ...
Binary.pike:
int(0..1) `==(mixed rel) { if (predef::`==(rel, this)) return 1; // This is never reached.