RUST_BACKTRACE=1 rustup show | grep -q ^nightly
thread 'main' panicked at 'failed printing to stdout: Broken pipe (os error 32)', libstd/io/stdio.rs:700:9
stack backtrace:
   0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace
             at libstd/sys/unix/backtrace/tracing/gcc_s.rs:49
   1: std::panicking::default_hook::{{closure}}
             at libstd/sys_common/backtrace.rs:71
   2: std::panicking::rust_panic_with_hook
             at libstd/panicking.rs:227
             at libstd/panicking.rs:476
   3: std::panicking::continue_panic_fmt
             at libstd/panicking.rs:390
   4: std::panicking::begin_panic_fmt
             at libstd/panicking.rs:345
   5: std::io::stdio::_print
             at libstd/io/stdio.rs:700
             at libstd/io/stdio.rs:709
   6: rustup_init::rustup_mode::main
   7: rustup_init::run_rustup
   8: rustup_init::main
   9: std::rt::lang_start::{{closure}}
  10: main
  11: __libc_start_main
  12: <unknown>