Prevent Windows filesystem races in bootstrap tests

rust-lang · Jun 16, 2018 · b436dca · b436dca
1 parent 18bb86e
commit b436dca
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/src/bootstrap/test.rs b/src/bootstrap/test.rs
@@ -1921,6 +1921,9 @@ impl Step for Bootstrap {
             cmd.arg("--no-fail-fast");
         }
         cmd.arg("--").args(&builder.config.cmd.test_args());
+        // rustbuild tests are racy on directory creation so just run them one at a time.
+        // Since there's not many this shouldn't be a problem.
+        cmd.arg("--test-threads=1");
         try_run(builder, &mut cmd);
     }