Crash on operation after undo of copy/paste involving tuplet

Ubuntu 14.04, GIT commit: 7a7c59c

1) open attached score, or enter a tuplet into any measure in any score
2) select measure containing tuplet
3) copy
4) select another measure
5) paste
6) undo
7) click any note anywhere in score
8) up

Result: crash

*Any* edit operation results in a crash at that point - it seems from where the crash occurs (a few levels deep in destructors under UndoCommand::cleanup()) that the undo stack itself is messed up, maybe.