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fix(minimald): report a wedged mint attach as busy, not exited - #2121
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mint_session_host collapsed both HostAttachError arms into one SpawnFailed, so a wedged-but-alive host was reported as having "exited before its channel could attach". Split the mapping: Closed keeps the spawn failure, Timeout maps to SessionBusy, matching the re-attach path's refusal of the same wedged case. Prove both arms through a test seam that puts a freshly launched host into each state before the mint's own attach runs. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
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Included review availability: This review used your included allowance. 0 included reviews remain after this review. Your included PR review attempts over the past 7 days set your current allowance at 5 reviews per hour. 📝 WalkthroughWalkthroughSession host minting now distinguishes a host that exits before channel attachment from a live host whose attachment times out. A test-only seam simulates both conditions. Regression tests verify the client errors and confirm that a retry uses the retained wedged host. ChangesHost Attachment
Priority: ➖ Normal Estimated code review effort: 2 (Simple) | ~10 minutes Change: Bug fix Suggested reviewers: Merge Risk: ⚪ Minimal · up to A wedged session host is now reported as busy, and a retry reuses that host instead of starting another one. No remaining merge-blocking risk was found. Pre-merge checks |
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The title is concise, uses the required Conventional Commit format, and clearly describes the main behavior change: reporting a wedged mint attach as busy instead of exited. |
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The description provides the change summary and verification results, including test and lint commands. It uses "Verification" instead of the template's "Testing" heading and omits the required Checkl… |
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A rabbit checks the host’s reply,
One exits; one still waits nearby.
A timeout marks the busy door,
The next try finds the host once more.
Two tests record what each will do.
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Actionable comments posted: 1
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @crates/minimald/src/session.rs:
- Around line 4670-4671: Update the Timeout arm in the attach flow to store the
launched host in the host slot and set its origin to Interactive before
returning SessionBusy. Ensure retries and teardown reuse that host rather than
creating another one.
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A first attach that timed out returned SessionBusy before the launched host reached the slot, so its JoinHandle was dropped (detaching a live loop) and a retry minted a second host over it. Store the host before refusing; the retry now takes the re-attach path.
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Approved: no findings at Nothing to do. Clobber: none: |
The HostWedged seam now ends the real host's loop before swapping in the wedged stand-in, so the stored (handle, task) pair describes one host and nothing of the real loop outlives the swap. Also drop the stale "stored only once it is bound" clause from the mint's attach comment.
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/review |
Routing-Key: inbox-route/I_kwDOSUhdos8AAAABWKn4Tg
The daemon's attach path collapsed both ways a mint can fail into one
message: whether the host's loop ended or wedged in the window between
launch and attach, the client was told it "exited before its channel
could attach". A wedged host is alive — reading it as dead invites
minting a second host over a healthy, busy one. Split the mapping in
mint_session_host: a closed mailbox keeps the spawn failure, while a
timed-out attach probe maps to the SessionBusy refusal the re-attach
path already uses for the same wedged case (informed by #383).
Verification
cargo fmt --all --check— cleancargo clippy --workspace --all-targets --locked -- -D warnings— cleancargo test -p minimald— session::tests 119/119 pass, includingthe two new proofs: a mint whose host dies before attach reports a
spawn failure, and a mint whose host wedges reports busy instead of
death (the wedged refusal also asserts the exited message is absent);
the full-suite run shows 11 pre-existing log-capture races in
net::switch/rpc/connection that fail identically on the unpatched
tree and pass in isolation
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