Add a bunch of ugly debugging prints to figure out why the bots are failing.

pkg/scheduled_test/test/scheduled_process_test.dart

Index: pkg/scheduled_test/test/scheduled_process_test.dart
diff --git a/pkg/scheduled_test/test/scheduled_process_test.dart b/pkg/scheduled_test/test/scheduled_process_test.dart
index 02a113c2cd5cd3067d2cf99c24e961f5a6498ecc..de94c96c668e8605c9c7e7b05dd7da59ed7bd3e2 100644
--- a/pkg/scheduled_test/test/scheduled_process_test.dart
+++ b/pkg/scheduled_test/test/scheduled_process_test.dart
@@ -118,31 +118,31 @@ void main() {
     });
   });
 
-  // TODO(nweiz): re-enable this (issue 9022).
-  // expectTestsPass("a process that ends while waiting for stdout shouldn't "
-  //     "block the test", () {
-  //   var errors;
-  //   test('test 1', () {
-  //     currentSchedule.onException.schedule(() {
-  //       errors = currentSchedule.errors;
-  //     });
-  //
-  //     var process = startDartProcess('');
-  //     expect(process.nextLine(), completion(equals('hello')));
-  //     expect(process.nextLine(), completion(equals('world')));
-  //     process.shouldExit(0);
-  //   });
-  //
-  //   test('test 2', () {
-  //     expect(errors, everyElement(new isInstanceOf<ScheduleError>()));
-  //     expect(errors.length, equals(2));
-  //     expect(errors[0].error, isStateError);
-  //     expect(errors[0].error.message, equals("No elements"));
-  //     expect(errors[1].error, matches(r"^Process "
-  //         r"'[^']+[\\/]dart(\.exe)? [^']+' ended earlier than scheduled with "
-  //         r"exit code 0\."));
-  //   });
-  // }, passing: ['test 2']);
+  expectTestsPass("a process that ends while waiting for stdout shouldn't "
+      "block the test", () {
+    print("beginning test: a process that ends while waiting for stdout shouldn't block the test");
+    var errors;
+    test('test 1', () {
+      currentSchedule.onException.schedule(() {
+        errors = currentSchedule.errors;
+      });
+  
+      var process = startDartProcess('');
+      expect(process.nextLine(), completion(equals('hello')));
+      expect(process.nextLine(), completion(equals('world')));
+      process.shouldExit(0);
+    });
+  
+    test('test 2', () {
+      expect(errors, everyElement(new isInstanceOf<ScheduleError>()));
+      expect(errors.length, equals(2));
+      expect(errors[0].error, isStateError);
+      expect(errors[0].error.message, equals("No elements"));
+      expect(errors[1].error, matches(r"^Process "
+          r"'[^']+[\\/]dart(\.exe)? [^']+' ended earlier than scheduled with "
+          r"exit code 0\."));
+    });
+  }, passing: ['test 2']);
 
   expectTestsPass("a process that ends during the task immediately before it's "
       "scheduled to end shouldn't cause an error", () {
@@ -169,6 +169,7 @@ void main() {
   });
 
   expectTestsPass("nextLine throws an error if there's no more stdout", () {
+    print("beginning test: nextLine throws an error if there's no more stdout");
     var errors;
     test('test 1', () {
       currentSchedule.onException.schedule(() {
@@ -208,6 +209,7 @@ void main() {
   });
 
   expectTestsPass("nextErrLine throws an error if there's no more stderr", () {
+    print("beginning test: nextErrLine throws an error if there's no more stdout");
     var errors;
     test('test 1', () {
       currentSchedule.onException.schedule(() {