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ChuckBuildsandClaude Opus 5
c615d5a3bb
Second bug found while validating the previous commit on hardware. install_plugin's new set-aside/restore had no lock. The web UI runs Flask threaded, so a double-clicked Install button gives two threads the same plugin_id; interleaved, one thread's restore deletes the other's freshly installed copy. _reinstall_with_rollback already guards exactly this with a per-plugin lock, and install_plugin needs the same one. Taking that lock naively deadlocks. _reinstall_with_rollback holds it across its call to install_plugin, and threading.Lock is not reentrant -- so the request thread hangs forever on the standard monorepo update path (update_plugin -> _reinstall_with_rollback -> install_plugin), which is to say on every plugin update. Verified by reverting to a plain Lock: the regression test times out after 10s instead of passing. The per-plugin locks are now RLocks, and install_plugin holds one for its whole set-aside/install/restore sequence. Verified on devpi (Pi, Python 3.13.5, real registry and network): - update_plugin on an up-to-date plugin: True in 5.4s - update_plugin forced through the full reinstall-with-rollback path: True in 13.1s, correct version restored, old copy replaced, no backup directories left behind - install -> reinstall-over-existing -> failed-reinstall-restores: all pass against real downloads - 22 plugins load, no tracebacks, web API and UI 200, steady-state journal 50 lines/min 791 core unit tests pass, including 2 new concurrency tests. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01Udr6MfaFLUPhX5Fgo67Jf5