tui crashes in v1.19.4

[jivanic-demystdata]

Checks

• I have searched github.com/aws/amazon-q-developer-cli/issues and there are no duplicates of my issue
• I have run q doctor in the affected terminal session
• I have run q restart and replicated the issue again

Operating system

macOS 26.4.0 (25E246)

Expected behaviour

tui launches

Actual behaviour

nothing happens

Screen.Recording.2026-04-07.at.10.22.36.am.mov

Steps to reproduce

No response

Environment

<This will be visible to anyone. Do not include personal or sensitive information>

[q-details]
version = "1.29.4"
hash = "b5dcf43e402cddd5a6507bf16fc9daba86f48c4e"
date = "2026-04-06T21:44:29.987555Z (6h ago)"
variant = "full"

[system-info]
os = "macOS 26.4.0 (25E246)"
chip = "Apple M3 Pro"
total-cores = 12
memory = "36.00 GB"

[environment]
cwd = "/Users/USER"
cli-path = "/Users/USER"
os = "Mac"
shell-path = "/bin/zsh"
shell-version = "5.9"
terminal = "iTerm 2"
install-method = "unknown"

[env-vars]
PATH = <redacted>
QTERM_SESSION_ID = "6126cefbf01b4970b9dd5e2928f979c9"
Q_SET_PARENT_CHECK = "1"
Q_TERM = "1.29.4"
SHELL = "/bin/zsh"
TERM = "xterm-256color"
__CFBundleIdentifier = "com.googlecode.iterm2"

[bluedoors]

Looks like the bundled bun runtime (v1.3.10) that powers the TUI is hitting a SIGTRAP / EXC_BREAKPOINT in pthread_jit_write_protect_np,
which is the macOS JIT write protection mechanism.

[akhileshb]

We released a fix for this. Please run kiro-cli update to get 1.29.5 Let us know if you are still facing this issue

[bluedoors]

Tested 1.29.5 and issue resolved