message: Fix the test annotation.
diff: // ignore-windows: Concurrency on Windows is not supported yet.
  +// error-pattern: unsupported operation: the main thread terminated without waiting for other threads
  // Check that we terminate the program when the main thread terminates.
  -//~^^^^ ERROR: unsupported operation: the main thread terminated without waiting for other threads
  -
  #![feature(rustc_private)]
  extern crate libc;
  