Get rid of 'close' on process. It is very easy to use incorrectly and cut off data from your stream…

tests/standalone/io/process_segfault_test.dart

Index: tests/standalone/io/process_segfault_test.dart
diff --git a/tests/standalone/io/process_segfault_test.dart b/tests/standalone/io/process_segfault_test.dart
index 541a4f6f0d2995fd92fc92f096dd1d3f5208f779..e535a69d45a0d12de0ac98cb623d5edbfb997125 100644
--- a/tests/standalone/io/process_segfault_test.dart
+++ b/tests/standalone/io/process_segfault_test.dart
@@ -14,8 +14,9 @@ testExit() {
   future.then((process) {
     process.onExit = (int exitCode) {
       Expect.isTrue(exitCode != 0);
-      process.close();
     };
+    process.stdout.onData = process.stdout.read;
+    process.stderr.onData = process.stderr.read;
   });
 }