fix(tvix): Make working flag thread_local r/1782

Since the daemon is running in threads now rather than forking a process
per connection (thanks to grpc) this static flag to prevent accidentally
initializing a new worker during a build is getting stepped on by
multiple threads. This converts it to thread-local, and also adds an
actual message to the check so that if it hits in the future we know
what's going on.

Fixes: b/58
Change-Id: I07a2f1582e56709c104f79935e5405fa24888f59
Reviewed-on: https://cl.tvl.fyi/c/depot/+/1940
Tested-by: BuildkiteCI
Reviewed-by: kanepyork <rikingcoding@gmail.com>
Reviewed-by: V <v@anomalous.eu>

0 files changed, 0 insertions, 0 deletions