durska:clippy alex$ RUST_BACKTRACE=1 TESTNAME=explicit_write cargo +nightly test
   Compiling clippy v0.0.165 (file:///Users/alex/Programming/rust/clippy)
   Compiling rustc-serialize v0.3.24
   Compiling getopts v0.2.15
   Compiling lazy_static v0.2.9
thread '<unnamed>' panicked at 'timeout in poll?', /Users/travis/.cargo/registry/src/github.com-1ecc6299db9ec823/jobserver-0.1.7/src/lib.rs:505:29
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.
stack backtrace:
   0: std::sys::imp::backtrace::tracing::imp::unwind_backtrace
   1: std::sys_common::backtrace::_print
   2: std::panicking::default_hook::{{closure}}
   3: std::panicking::default_hook
   4: std::panicking::rust_panic_with_hook
   5: std::panicking::begin_panic
   6: jobserver::Client::acquire
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: "SendError(..)"', src/libcore/result.rs:906:4
stack backtrace:
   0: std::sys::imp::backtrace::tracing::imp::unwind_backtrace
   1: std::sys_common::backtrace::_print
   2: std::panicking::default_hook::{{closure}}
   3: std::panicking::default_hook
   4: std::panicking::rust_panic_with_hook
   5: std::panicking::begin_panic
   6: std::panicking::begin_panic_fmt
   7: rust_begin_unwind
   8: core::panicking::panic_fmt
   9: core::result::unwrap_failed
  10: jobserver::HelperThread::request_token
  11: cargo::ops::cargo_rustc::job_queue::JobQueue::drain_the_queue
  12: cargo::ops::cargo_rustc::compile_targets
  13: cargo::ops::cargo_compile::compile_ws
  14: cargo::ops::cargo_compile::compile_with_exec
  15: cargo::ops::cargo_test::compile_tests
  16: cargo::ops::cargo_test::run_tests
  17: cargo::call_main_without_stdin
  18: cargo::try_execute_builtin_command
  19: cargo::execute
  20: cargo::call_main_without_stdin
  21: cargo::main
  22: __rust_maybe_catch_panic
  23: std::rt::lang_start