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claude-code - 💡(How to fix) Fix [Bug] Approval prompt fails to render intermittently, causing session to hang

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Root Cause

Bug Description Title: Permission/approval prompt intermittently fails to render.

Severity: High. Session hangs, forcing an interrupt and reissuing of work.

Summary: Relatively often, a tool call that requires approval (Edit/Write, Bash) gates internally but does not render the approval prompt. The session freezes because it's waiting for an approval which I have no opportunity to provide.

Details:

  • Intermittent; no obvious correlation to anything else going on.

  • Process is sleeping (S+), caffeinate child present (harness believes it's mid-tool-call), no command shell running, no zombie child.

  • Transcript shows the tool_use with no matching tool_result (dangling) for the entire hang.

  • Redraw nudges do not help: Ctrl+L, keypresses, terminal resize, and SIGWINCH all fail.

  • Shift+Tab (switching permission mode to accept-edits) does release the queued operation.

Expected: the approval prompt always renders when a tool gates on it. If a render fails, the harness re-emits/recovers it rather than waiting forever.

Environment: macOS 13.7.6 (ARM64), iTerm2; Claude Code 2.1.162.

Code Example

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Bug Description Title: Permission/approval prompt intermittently fails to render.

Severity: High. Session hangs, forcing an interrupt and reissuing of work.

Summary: Relatively often, a tool call that requires approval (Edit/Write, Bash) gates internally but does not render the approval prompt. The session freezes because it's waiting for an approval which I have no opportunity to provide.

Details:

  • Intermittent; no obvious correlation to anything else going on.

  • Process is sleeping (S+), caffeinate child present (harness believes it's mid-tool-call), no command shell running, no zombie child.

  • Transcript shows the tool_use with no matching tool_result (dangling) for the entire hang.

  • Redraw nudges do not help: Ctrl+L, keypresses, terminal resize, and SIGWINCH all fail.

  • Shift+Tab (switching permission mode to accept-edits) does release the queued operation.

Expected: the approval prompt always renders when a tool gates on it. If a render fails, the harness re-emits/recovers it rather than waiting forever.

Environment: macOS 13.7.6 (ARM64), iTerm2; Claude Code 2.1.162.

Environment Info

  • Platform: darwin
  • Terminal: iTerm.app
  • Version: 2.1.165
  • Feedback ID: 2f3b3d85-8cdc-4e11-889d-74a63a349b55

Errors

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