Re: [PATCH 6/6] coredump: Limit coredumps to a single thread group

[Kyle Huey]

> Solve this by making a userspace visible change to only kill a single
> process/thread group. [...] With LinuxThreads long gone I don't
> expect anyone to have a notice this behavior change in practice.

FWIW rr's test suite does have an explicit test that we correctly record and 
replay the old behavior. We don't actually care what that behavior is though,
so we will update our tests.

- Kyle