Compiler bug? (alias sth this; and std.signals)

[Maxim Fomin]

The third version using dmd 2.060 linux crashes. Valgrind shows 
lots of errors (other two are clean) relating to corrupted heap 
caused likely here 
(https://github.com/D-Programming-Language/phobos/blob/master/std/signals.d#L248) 
which is not surprising judging by semi-manual memory management 
in __dtor. I guess either you are abusing library feature or 
found a bug. Consider posting this to Bugzilla.