deno

acdc89d5 - fix: tear down Windows async read machinery in stop_tty before closing handle

fix: tear down Windows async read machinery in stop_tty before closing handle stop_tty() was closing the console handle without first unregistering the RegisterWaitForSingleObject callback or detaching the line-mode reader thread. This opened two races: 1. The wait callback holds a raw pointer to internal_wait_waker; if the handle is closed and the uv_tty_t freed before UnregisterWaitEx, the callback can wake through freed memory. 2. The detached line-read thread could still be using the HANDLE while close was happening. Add close_tty_read() that tears down the wait registration (blocking until any in-flight callback completes via INVALID_HANDLE_VALUE), drops the waker, and detaches from any in-flight line-mode read. Call it from stop_tty() before CloseHandle/_close. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>