Shared libraries

Shared libraries

It's slightly worse, because years of habit mean that C programmers are used to thinking about whether a change will break distro ABIs; Rust programmers aren't, and because Rust makes it easier to express things that are hard to express in C (sum types, for example), they're more likely to make changes to fix a bug that make the situation worse.

Remember that the state we're in with C is in part because the language requires programmers to get it right, or risk UB, and as a result, C programmers doing security fixes tend to be thinking about all the ways they can accidentally break someone; Rust programmers tend not to be doing that, because the result of breaking someone is a compiler error, not UB.

That cultural difference matters, and is part of why the aim on the Rust side is to have a state where swapping in an incompatible dynamic library is a dynamic linker failure, not UB as it is in C.