This is one of the most painfully ignorant things I have ever read. There is absolutely no such thing as "all states are defined". This has nothing to do with

This is one of the most painfully ignorant things I have ever read. There is absolutely no such thing as "all states are defined". This has nothing to do with the language. There is nothing magical about a "higher level language" to safeguard from failures. At best you could be referring to managed languages, where memory access and exceptions are controlled and the extent of a aborted execution is predetermined - but still not immune to just closing a process when they misbehave. That is precisely what a process should do. Nonetheless, nothing in this bug report indicates that the system is acting in an undefined manner. The library that failed may have, by design, been programmed to close when font rendering reached these conditions. We don't know if this was a signal abort or an intentional if (bad_outcome) close() Any level from the most managed sandboxed level to the most host level process may fail, regardless of the language used.