...multi-dispatch we need compiler support to invalidate
ambiguous cases and force the programmer to...

...rule change is that indexed assignment can invalidate any slices and copies, which isn't...

...issue that affects languge design does not invalidate the language design principle at stake.  It...

...clauses (and 'out' contracts?  or do exceptions invalidate those?), all of which have to be...

...through a pointer and every function call must be assumed to invalidate all referenced data.

...perform optimizations around scope boundaries that can invalidate the reference counting invariant.  If that ever...

...generics will change the language enough to invalidate all code written to the D 1...