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Fix terminal renderer crash during window reparenting - #16789
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Included review availability: This review used your included allowance. Your plan provides up to 10 included reviews per hour; 1 remain after this review. 📝 WalkthroughWalkthroughThe notification handlers now schedule renderer-visibility updates in main-actor tasks, and the update method checks the view’s window attachment. Codex fork argument construction moves to a shared helper. Cloud port handlers stop binding associated URL values, and port tooltip and accessibility expectations are updated. ChangesRenderer Visibility
Codex Fork Routing
Cloud Port Patterns
Priority: ⬆️ High Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Bug fix Suggested reviewers: Merge Risk: ⚪ Minimal · up to The fork monitor continues to receive its owner PID, and no concrete renderer or cloud-port regression is established. The available evidence leaves no actionable merge risk. Security Architecture ReviewSecurity architecture risk: 🔵 Low · up to The change does not expand reachable commands or privileges. A deferred visibility update can, however, outlive its original window attachment and pause rendering in the terminal’s new window. Retained concerns
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Full details: Cmux Swift Package BoundariesExplanation The diff adds pure, independently testable Codex fork argument logic to Resolution Move the Codex fork argument builder out of the app-root ✨ Finishing Touches 💡 1📝 Generate docstrings 💡
🧪 Generate unit tests (beta)
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Dogfood build of cmux DEV pr-16789-eef2e1b2.app The link opens this exact commit in the cmux dev menu bar app; the page waits until the build is ready. Builds run only while this PR has the Covers Dogfood tours of
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Actionable comments posted: 2
- 🪄 Fix CodeRabbit comments on this PR
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Inline comments:
Review comments at @Sources/GhosttyTerminalView.swift:
- Around line 5367-5374: Update applyRendererWindowVisibility to return unless
the view’s current window is identical to the supplied window, preventing queued
visibility updates for a previous window from affecting the current renderer.
Review comments at @Sources/Surfaces/CmuxTuiRemoteRouting.swift:
- Around line 8-9: Use the shared
`CmuxTuiRemoteRouting.codexForkMonitorArguments` helper for Codex fork monitor
arguments in the CLI, replacing the local call and removing the duplicate
`Self.codexForkMonitorArguments` implementation. Keep the shared helper as the
single source of truth.
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Merge receipt for |
4809435 Fix terminal renderer crash during window reparenting (manaflow-ai#16789) e0418b8 Fix confusing port discovery loading copy (manaflow-ai#16770) 1917ea1 fix(cli): validate notification-family arguments (manaflow-ai#16060) a03f6b9 Add a Middle-Click Paste toggle to Settings > Terminal (manaflow-ai#16954)
1 participant
Problem
Stable 0.64.25 can terminate with
EXC_BAD_ACCESSwhile a terminal view is being moved between windows. Sentry issue CMUXTERM-MACOS-276Q shows the crashing stack inGhosttyNSView.viewDidMoveToWindow, inside aMainActor.assumeIsolatedobserver callback.Change
Window occlusion and key/main notification callbacks now enqueue their work on
@MainActorinstead of assuming that NotificationCenter's.mainoperation queue is already the Swift concurrency main executor. This removes the unsafe executor assertion during AppKit teardown and reparenting.Verification
python3 scripts/verify-local.py --affected HEAD~1xcodebuild test; hosted macOS checks should compile and exercise the app.Changelog
Fixed terminal renderer crashes during window reparenting.
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@codesmith-botwith what you need. Autofix is disabled.Summary by cubic
Fixes a terminal renderer crash (
EXC_BAD_ACCESS) that could occur when a terminal view was moved between windows or during window teardown. Window occlusion and key/main notification callbacks now hop to the main actor explicitly (Task { @MainActor }) instead of assuming it viaMainActor.assumeIsolated, which was unsafe because NotificationCenter's.mainqueue does not guarantee the Swift concurrency main actor executor. Renderer visibility updates also ignore windows other than the view's current window.Removes the unused
urlbinding in Cloud port row patterns and updates port row tests to match the current presentation, where the "Open in cmux" VPN affordance text no longer appears in tooltips. Restores the shared--fork-*monitor argument builder inCmuxTuiRemoteRoutingso the app test target's CLI helper alias gets the same Codex fork flags as the executable.Written for commit eef2e1b. Summary will update on new commits.
Summary by CodeRabbit
New Features
Bug Fixes