Agreed. We had a segfault in Servo due to upgrading the compiler (and some internal representations changing). I wasn't able to track it myself (unfamiliarity w

Agreed. We had a segfault in Servo due to upgrading the compiler (and some internal representations changing). I wasn't able to track it myself (unfamiliarity with the code), but someone else was able to find its origin and fix it without much trouble because of `unsafe`. (That aside, we very rarely have segfaults in Servo, and Servo's huge)