alt Hacker NewsThe existence of a soundness bug in the typechecker doesn’t refute the value of soundness as a language design contract.
If anything it’s the opposite: issues demonstrated by cve-rs are _language bugs_ and are _fixable_ in principle. “Safe Rust should be memory-safe” is a well-defined, falsifiable contract that the compiler can be measured against. Meanwhile memory unsafety is a feature of the semantics of C++ and so it would be absurd to file a bug against gcc complaining that it compiled your faulty code.
The language design contract is unsafe by default. In memory, types and concurrency. What are you talking about? There are unsafe blocks all over the stdlib. And concurrency safety would need to get rid of their blocking IO, which they haven't even acknowledged.