Something that should be clarified in the docs: what if two threads push multiple error scopes at the same time? Are scopes local to the current thread, or will errors be sent to the thread which opened a scope last, or something else?

On the web, this is less of an issue since everything is single-threaded, but what happens on native?

This actually wasn't really previously defined - webgpu.h we decided they're going to be thread local. We need to redefine the api in wgpu to use a thread local.