# types.ProgramResult.lostEnd

- **Module:** types
- **Package:** libtmux
- **Language:** TypeScript
- **Kind:** property
- **Source:** https://github.com/libtmux/libtmux-ts/blob/ad09eaef7ffff40f510989ee0695852c44a31576/packages/libtmux/src/types.ts#L683
- **Page:** https://libtmux.org/en/ts/latest/reference/types-programresult-lostend/

Whether [`output`](/en/ts/latest/reference/types-programresult-output/) may lack its end: tmux removed the pane before reading it, or a SIGKILL to the process group left the end unproven. A run that timed out is read before it ends, so this is false and [`timedOut`](/en/ts/latest/reference/types-programresult-timedout/) says why.