# libtmux::CommandRuntimeShutdown::failure

- **Module:** libtmux::CommandRuntimeShutdown
- **Package:** libtmux-cxx
- **Language:** C++
- **Kind:** attribute
- **Source:** https://github.com/libtmux/libtmux-cxx/blob/85e8bd603a322dc32bb8b9aeb1a72bcf36945f1d/include/libtmux/async.hpp#L60
- **Page:** https://libtmux.org/reference/cxx/libtmux-commandruntimeshutdown-failure/

The first runtime lifecycle failure; an operation may also carry it.