Use libtest ERROR_EXIT_CODE constant

Author: GuillaumeGomez

src/librustdoc/doctest.rs

@@ -836,8 +836,7 @@ fn run_test(
  match result {
  Err(e) => return (duration, Err(TestFailure::ExecutionError(e))),
  Ok(out) => {
- // FIXME: use test::ERROR_EXIT_CODE once public
- if langstr.should_panic && out.status.code() != Some(101) {
+ if langstr.should_panic && out.status.code() != Some(test::ERROR_EXIT_CODE) {
  return (duration, Err(TestFailure::UnexpectedRunPass));
  } else if !langstr.should_panic && !out.status.success() {
  return (duration, Err(TestFailure::ExecutionFailure(out)));

src/librustdoc/doctest/runner.rs

@@ -143,8 +143,7 @@ mod __doctest_mod {{
  .output()
  .expect(\"failed to run command\");
  if should_panic {{
- // FIXME: use test::ERROR_EXIT_CODE once public
- if out.status.code() != Some(101) {{
+ if out.status.code() != Some(test::ERROR_EXIT_CODE) {{
  eprintln!(\"Test didn't panic, but it's marked `should_panic`.\");
  ExitCode::FAILURE
  }} else {{