Bugs found with Rewind VM

Bugs in open source projects that Rewind VM found, each linked to its upstream report.

Nix

• A new store's database is busy when several processes open it at once
• The gc-closure test can fail with SIGPIPE

Flox

• Activations that start and exit together corrupt each other's state
• Two concurrent flox activate -s restart each other's services
• A finished activation's on-deactivate hook runs alongside the next on-activate
• The on-deactivate hook runs after on-activate failed
• flox install and flox edit fail in containers

nixd

• Formatting hangs on large files, can kill nixd with SIGPIPE, and leaks fds

Jujutsu

• Three test_converge tests fail when operations end in the same millisecond