From 8fabcef9bcdf8e83231c91234101fbddb549733e Mon Sep 17 00:00:00 2001
From: Tobe O <thosakwe@gmail.com>
Date: Mon, 9 Jul 2018 10:40:06 -0400
Subject: [PATCH] Tracked down the rogue "null" print

---
 .idea/workspace.xml         | 225 +++++++++++++++++++-----------------
 lib/src/core/injection.dart |   2 +-
 pubspec.yaml                |   1 +
 test/hm.dart                |  14 +++
 4 files changed, 133 insertions(+), 109 deletions(-)
 create mode 100644 test/hm.dart

diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 09a9f58c..6d98851c 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -2,13 +2,10 @@
 <project version="4">
   <component name="ChangeListManager">
     <list default="true" id="7b89ff1e-1260-4dcf-9c3d-345de0471ea1" name="Default" comment="">
-      <change beforePath="$PROJECT_DIR$/.idea/libraries/Dart_Packages.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/libraries/Dart_Packages.xml" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/test/hm.dart" afterDir="false" />
       <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/test/common.dart" beforeDir="false" afterPath="$PROJECT_DIR$/test/common.dart" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/test/controller_test.dart" beforeDir="false" afterPath="$PROJECT_DIR$/test/controller_test.dart" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/test/hooked_test.dart" beforeDir="false" afterPath="$PROJECT_DIR$/test/hooked_test.dart" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/test/routing_test.dart" beforeDir="false" afterPath="$PROJECT_DIR$/test/routing_test.dart" afterDir="false" />
-      <change beforePath="$PROJECT_DIR$/test/typed_service_test.dart" beforeDir="false" afterPath="$PROJECT_DIR$/test/typed_service_test.dart" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/lib/src/core/injection.dart" beforeDir="false" afterPath="$PROJECT_DIR$/lib/src/core/injection.dart" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/pubspec.yaml" beforeDir="false" afterPath="$PROJECT_DIR$/pubspec.yaml" afterDir="false" />
     </list>
     <ignored path="$PROJECT_DIR$/.tmp/" />
     <ignored path="$PROJECT_DIR$/temp/" />
@@ -31,18 +28,6 @@
   </component>
   <component name="FileEditorManager">
     <leaf SIDE_TABS_SIZE_LIMIT_KEY="300">
-      <file leaf-file-name="parameter_meta_test.dart" pinned="false" current-in-tab="false">
-        <entry file="file://$PROJECT_DIR$/test/parameter_meta_test.dart">
-          <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="48">
-              <caret line="7" column="42" selection-start-line="7" selection-start-column="42" selection-end-line="7" selection-end-column="42" />
-              <folding>
-                <element signature="e#0#20#0" expanded="true" />
-              </folding>
-            </state>
-          </provider>
-        </entry>
-      </file>
       <file leaf-file-name="CHANGELOG.md" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/CHANGELOG.md">
           <provider selected="true" editor-type-id="split-provider[text-editor;markdown-preview-editor]">
@@ -67,8 +52,17 @@
       <file leaf-file-name="angel_http.dart" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/lib/src/http/angel_http.dart">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="400">
-              <caret line="319" column="20" selection-start-line="319" selection-start-column="20" selection-end-line="319" selection-end-column="20" />
+            <state relative-caret-position="133">
+              <caret line="172" column="47" lean-forward="true" selection-start-line="172" selection-start-column="47" selection-end-line="172" selection-end-column="47" />
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file leaf-file-name="injection.dart" pinned="false" current-in-tab="true">
+        <entry file="file://$PROJECT_DIR$/lib/src/core/injection.dart">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="43">
+              <caret line="141" lean-forward="true" selection-start-line="141" selection-end-line="141" />
             </state>
           </provider>
         </entry>
@@ -76,8 +70,8 @@
       <file leaf-file-name="common.dart" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/test/common.dart">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="205">
-              <caret line="39" column="11" lean-forward="true" selection-start-line="39" selection-start-column="11" selection-end-line="39" selection-end-column="11" />
+            <state relative-caret-position="436">
+              <caret line="39" column="11" selection-start-line="39" selection-start-column="11" selection-end-line="39" selection-end-column="11" />
               <folding>
                 <element signature="e#38#92#0" expanded="true" />
               </folding>
@@ -85,6 +79,18 @@
           </provider>
         </entry>
       </file>
+      <file leaf-file-name="hm.dart" pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/test/hm.dart">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="96">
+              <caret line="6" column="76" selection-start-line="6" selection-start-column="76" selection-end-line="6" selection-end-column="76" />
+              <folding>
+                <element signature="e#0#20#0" expanded="true" />
+              </folding>
+            </state>
+          </provider>
+        </entry>
+      </file>
       <file leaf-file-name="routing_test.dart" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/test/routing_test.dart">
           <provider selected="true" editor-type-id="text-editor">
@@ -94,11 +100,11 @@
           </provider>
         </entry>
       </file>
-      <file leaf-file-name="typed_service_test.dart" pinned="false" current-in-tab="true">
+      <file leaf-file-name="typed_service_test.dart" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/test/typed_service_test.dart">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="160">
-              <caret line="10" column="5" lean-forward="true" selection-start-line="10" selection-start-column="5" selection-end-line="10" selection-end-column="5" />
+            <state relative-caret-position="448">
+              <caret line="28" column="17" selection-start-line="28" selection-start-column="17" selection-end-line="28" selection-end-column="17" />
               <folding>
                 <element signature="e#0#54#0" expanded="true" />
               </folding>
@@ -109,8 +115,8 @@
       <file leaf-file-name="hooked_test.dart" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/test/hooked_test.dart">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="120">
-              <caret line="99" column="74" lean-forward="true" selection-start-line="99" selection-start-column="74" selection-end-line="99" selection-end-column="74" />
+            <state relative-caret-position="1504">
+              <caret line="99" column="74" selection-start-line="99" selection-start-column="74" selection-end-line="99" selection-end-column="74" />
             </state>
           </provider>
         </entry>
@@ -127,7 +133,6 @@
   </component>
   <component name="FindInProjectRecents">
     <findStrings>
-      <find>logger.</find>
       <find>Stopwa</find>
       <find>handleAnge</find>
       <find>errorHandl</find>
@@ -157,6 +162,7 @@
       <find>Typ</find>
       <find>TypeMatcher</find>
       <find>cast(</find>
+      <find>print</find>
     </findStrings>
     <replaceStrings>
       <replace>if (_isClosed &amp;&amp; !_useStream)</replace>
@@ -197,8 +203,8 @@
       <dir>$PROJECT_DIR$/lib/src</dir>
       <dir>$PROJECT_DIR$/test</dir>
       <dir>$PROJECT_DIR$/lib/src/core</dir>
-      <dir>$PROJECT_DIR$/lib</dir>
       <dir>$PROJECT_DIR$</dir>
+      <dir>$PROJECT_DIR$/lib</dir>
     </dirStrings>
   </component>
   <component name="Git.Settings">
@@ -212,8 +218,6 @@
   <component name="IdeDocumentHistory">
     <option name="CHANGED_PATHS">
       <list>
-        <option value="$PROJECT_DIR$/test/precontained_test.dart" />
-        <option value="$PROJECT_DIR$/test/repeat_request_test.dart" />
         <option value="$PROJECT_DIR$/example/json.dart" />
         <option value="$PROJECT_DIR$/test/general_test.dart" />
         <option value="$PROJECT_DIR$/lib/src/http/http.dart" />
@@ -253,16 +257,18 @@
         <option value="$PROJECT_DIR$/test/serialize_test.dart" />
         <option value="$PROJECT_DIR$/test/server_test.dart" />
         <option value="$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/angel_http_exception-1.0.0/lib/angel_http_exception.dart" />
-        <option value="$PROJECT_DIR$/lib/src/core/injection.dart" />
         <option value="$PROJECT_DIR$/lib/src/core/map_service.dart" />
         <option value="$PROJECT_DIR$/CHANGELOG.md" />
         <option value="$PROJECT_DIR$/lib/src/core/response_context.dart" />
         <option value="$PROJECT_DIR$/lib/src/core/request_context.dart" />
         <option value="$PROJECT_DIR$/test/hooked_test.dart" />
-        <option value="$PROJECT_DIR$/pubspec.yaml" />
         <option value="$PROJECT_DIR$/test/common.dart" />
         <option value="$PROJECT_DIR$/test/routing_test.dart" />
         <option value="$PROJECT_DIR$/test/typed_service_test.dart" />
+        <option value="$PROJECT_DIR$/example/hm.dart" />
+        <option value="$PROJECT_DIR$/pubspec.yaml" />
+        <option value="$PROJECT_DIR$/test/hm.dart" />
+        <option value="$PROJECT_DIR$/lib/src/core/injection.dart" />
       </list>
     </option>
   </component>
@@ -289,6 +295,9 @@
       <foldersAlwaysOnTop value="true" />
     </navigator>
     <panes>
+      <pane id="AndroidView" />
+      <pane id="ProjectPane" />
+      <pane id="PackagesPane" />
       <pane id="Scope">
         <subPane subId="Project Files">
           <expand>
@@ -296,6 +305,11 @@
               <item name="Root" type="cbb8eebc:String" user="Root" />
               <item name="framework" type="cbb8eebc:String" user="framework" />
             </path>
+            <path>
+              <item name="Root" type="cbb8eebc:String" user="Root" />
+              <item name="framework" type="cbb8eebc:String" user="framework" />
+              <item name="example" type="cbb8eebc:String" user="example" />
+            </path>
             <path>
               <item name="Root" type="cbb8eebc:String" user="Root" />
               <item name="framework" type="cbb8eebc:String" user="framework" />
@@ -307,13 +321,6 @@
               <item name="lib" type="cbb8eebc:String" user="lib" />
               <item name="src" type="cbb8eebc:String" user="src" />
             </path>
-            <path>
-              <item name="Root" type="cbb8eebc:String" user="Root" />
-              <item name="framework" type="cbb8eebc:String" user="framework" />
-              <item name="lib" type="cbb8eebc:String" user="lib" />
-              <item name="src" type="cbb8eebc:String" user="src" />
-              <item name="core" type="cbb8eebc:String" user="core" />
-            </path>
             <path>
               <item name="Root" type="cbb8eebc:String" user="Root" />
               <item name="framework" type="cbb8eebc:String" user="framework" />
@@ -335,9 +342,6 @@
           <select />
         </subPane>
       </pane>
-      <pane id="ProjectPane" />
-      <pane id="AndroidView" />
-      <pane id="PackagesPane" />
     </panes>
   </component>
   <component name="PropertiesComponent">
@@ -362,6 +366,7 @@
   </component>
   <component name="RecentsManager">
     <key name="MoveFile.RECENT_KEYS">
+      <recent name="$PROJECT_DIR$/test" />
       <recent name="$PROJECT_DIR$/lib/src/core" />
       <recent name="$PROJECT_DIR$/lib/src/http" />
       <recent name="$PROJECT_DIR$/lib/src/util" />
@@ -664,14 +669,8 @@
       <workItem from="1530115464302" duration="135000" />
       <workItem from="1530124258733" duration="601000" />
       <workItem from="1530230623749" duration="89000" />
-      <workItem from="1531145856019" duration="547000" />
-    </task>
-    <task id="LOCAL-00043" summary="1.0.11">
-      <created>1511893540118</created>
-      <option name="number" value="00043" />
-      <option name="presentableId" value="LOCAL-00043" />
-      <option name="project" value="LOCAL" />
-      <updated>1511893540118</updated>
+      <workItem from="1531145856019" duration="691000" />
+      <workItem from="1531146644160" duration="433000" />
     </task>
     <task id="LOCAL-00044" summary="Close #178, bump to 1.1.0">
       <created>1512571595293</created>
@@ -1009,7 +1008,14 @@
       <option name="project" value="LOCAL" />
       <updated>1530124843111</updated>
     </task>
-    <option name="localTasksCounter" value="92" />
+    <task id="LOCAL-00092" summary="Provide custom IsInstanceOf for testing">
+      <created>1531146512450</created>
+      <option name="number" value="00092" />
+      <option name="presentableId" value="LOCAL-00092" />
+      <option name="project" value="LOCAL" />
+      <updated>1531146512451</updated>
+    </task>
+    <option name="localTasksCounter" value="93" />
     <servers />
   </component>
   <component name="TestHistory">
@@ -1045,7 +1051,7 @@
     </history-entry>
   </component>
   <component name="TimeTrackingManager">
-    <option name="totallyTimeSpent" value="154975000" />
+    <option name="totallyTimeSpent" value="155552000" />
   </component>
   <component name="TodoView">
     <todo-panel id="selected-file">
@@ -1080,10 +1086,10 @@
       <window_info anchor="right" id="Palette&#9;" order="3" />
       <window_info id="Image Layers" order="2" />
       <window_info anchor="right" id="Capture Analysis" order="3" />
-      <window_info anchor="bottom" id="Version Control" order="7" weight="0.32905984" />
       <window_info anchor="bottom" id="Run" order="2" sideWeight="0.4964476" weight="0.3973799" />
-      <window_info anchor="bottom" id="Terminal" order="7" weight="0.45560408" />
-      <window_info content_ui="combo" id="Project" order="0" visible="true" weight="0.2534901" />
+      <window_info anchor="bottom" id="Version Control" order="7" weight="0.32905984" />
+      <window_info anchor="bottom" id="Terminal" order="7" visible="true" weight="0.44978166" />
+      <window_info active="true" content_ui="combo" id="Project" order="0" visible="true" weight="0.25716385" />
       <window_info anchor="bottom" id="Find" order="1" weight="0.32905984" />
       <window_info anchor="right" id="SciView" order="4" />
       <window_info anchor="right" id="Theme Preview" order="3" />
@@ -1108,7 +1114,6 @@
   </component>
   <component name="VcsManagerConfiguration">
     <option name="CHECK_CODE_SMELLS_BEFORE_PROJECT_COMMIT" value="false" />
-    <MESSAGE value="Deprecated AngelMetrics" />
     <MESSAGE value="Export HTTP Req+Res context" />
     <MESSAGE value="HTTP ResponseContext works" />
     <MESSAGE value="Created pkg:framework/http.dart" />
@@ -1133,7 +1138,8 @@
     <MESSAGE value="+5" />
     <MESSAGE value="+6" />
     <MESSAGE value="+7" />
-    <option name="LAST_COMMIT_MESSAGE" value="+7" />
+    <MESSAGE value="Provide custom IsInstanceOf for testing" />
+    <option name="LAST_COMMIT_MESSAGE" value="Provide custom IsInstanceOf for testing" />
   </component>
   <component name="XDebuggerManager">
     <breakpoint-manager>
@@ -1141,20 +1147,6 @@
     </breakpoint-manager>
   </component>
   <component name="editorHistoryManager">
-    <entry file="file://$PROJECT_DIR$/example/view.dart">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="112">
-          <caret line="7" lean-forward="true" selection-start-line="7" selection-end-line="7" />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file:///usr/local/Cellar/dart/2.0.0-dev.59.0/libexec/lib/core/stacktrace.dart">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="197">
-          <caret line="28" column="15" lean-forward="true" selection-start-line="28" selection-start-column="15" selection-end-line="28" selection-end-column="15" />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/pubspec.lock">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="132">
@@ -1373,13 +1365,6 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/lib/src/core/injection.dart">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="235">
-          <caret line="143" lean-forward="true" selection-start-line="143" selection-end-line="143" />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/lib/src/http/http_request_context.dart">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="58">
@@ -1396,7 +1381,7 @@
     </entry>
     <entry file="file://$PROJECT_DIR$/test/parameter_meta_test.dart">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="48">
+        <state relative-caret-position="112">
           <caret line="7" column="42" selection-start-line="7" selection-start-column="42" selection-end-line="7" selection-end-column="42" />
           <folding>
             <element signature="e#0#20#0" expanded="true" />
@@ -1430,15 +1415,8 @@
     </entry>
     <entry file="file://$PROJECT_DIR$/test/hooked_test.dart">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="120">
-          <caret line="99" column="74" lean-forward="true" selection-start-line="99" selection-start-column="74" selection-end-line="99" selection-end-column="74" />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/pubspec.yaml">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="271">
-          <caret line="32" column="9" selection-start-line="32" selection-start-column="9" selection-end-line="32" selection-end-column="9" />
+        <state relative-caret-position="1504">
+          <caret line="99" column="74" selection-start-line="99" selection-start-column="74" selection-end-line="99" selection-end-column="74" />
         </state>
       </provider>
     </entry>
@@ -1449,13 +1427,6 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/lib/src/http/angel_http.dart">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="400">
-          <caret line="319" column="20" selection-start-line="319" selection-start-column="20" selection-end-line="319" selection-end-column="20" />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$USER_HOME$/.pub-cache/hosted/pub.dartlang.org/matcher-0.12.3/lib/src/core_matchers.dart">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="133">
@@ -1463,16 +1434,6 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/test/common.dart">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="205">
-          <caret line="39" column="11" lean-forward="true" selection-start-line="39" selection-start-column="11" selection-end-line="39" selection-end-column="11" />
-          <folding>
-            <element signature="e#38#92#0" expanded="true" />
-          </folding>
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/test/routing_test.dart">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="64">
@@ -1482,14 +1443,62 @@
     </entry>
     <entry file="file://$PROJECT_DIR$/test/typed_service_test.dart">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="160">
-          <caret line="10" column="5" lean-forward="true" selection-start-line="10" selection-start-column="5" selection-end-line="10" selection-end-column="5" />
+        <state relative-caret-position="448">
+          <caret line="28" column="17" selection-start-line="28" selection-start-column="17" selection-end-line="28" selection-end-column="17" />
           <folding>
             <element signature="e#0#54#0" expanded="true" />
           </folding>
         </state>
       </provider>
     </entry>
+    <entry file="file:///usr/local/Cellar/dart/2.0.0-dev.59.0/libexec/lib/async/zone.dart">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="77">
+          <caret line="192" column="44" selection-start-line="192" selection-start-column="44" selection-end-line="192" selection-end-column="44" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/pubspec.yaml">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="79">
+          <caret line="21" column="14" lean-forward="true" selection-start-line="21" selection-start-column="14" selection-end-line="21" selection-end-column="14" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/test/common.dart">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="436">
+          <caret line="39" column="11" selection-start-line="39" selection-start-column="11" selection-end-line="39" selection-end-column="11" />
+          <folding>
+            <element signature="e#38#92#0" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/test/hm.dart">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="96">
+          <caret line="6" column="76" selection-start-line="6" selection-start-column="76" selection-end-line="6" selection-end-column="76" />
+          <folding>
+            <element signature="e#0#20#0" expanded="true" />
+          </folding>
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/lib/src/http/angel_http.dart">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="133">
+          <caret line="172" column="47" lean-forward="true" selection-start-line="172" selection-start-column="47" selection-end-line="172" selection-end-column="47" />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/lib/src/core/injection.dart">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="43">
+          <caret line="141" lean-forward="true" selection-start-line="141" selection-end-line="141" />
+        </state>
+      </provider>
+    </entry>
   </component>
   <component name="masterDetails">
     <states>
diff --git a/lib/src/core/injection.dart b/lib/src/core/injection.dart
index cd03b412..9c3ebbe2 100644
--- a/lib/src/core/injection.dart
+++ b/lib/src/core/injection.dart
@@ -151,7 +151,7 @@ InjectionRequest preInject(Function handler) {
         .firstWhere((m) => m.type.isAssignableTo(_Parameter),
             orElse: () => null)
         ?.reflectee as Parameter;
-    print(p);
+    //print(p);
     if (p != null) {
       injection.parameters[name] = new Parameter(
         cookie: p.cookie,
diff --git a/pubspec.yaml b/pubspec.yaml
index 1d923fa1..d05c1ddc 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -30,4 +30,5 @@ dev_dependencies:
   angel_jael: ^1.0.0
   mock_request: ^1.0.0
   http: ^0.11.3
+  io: ^0.3.0
   test: ^0.12.13
diff --git a/test/hm.dart b/test/hm.dart
new file mode 100644
index 00000000..4231a923
--- /dev/null
+++ b/test/hm.dart
@@ -0,0 +1,14 @@
+import 'dart:async';
+import 'package:io/ansi.dart';
+import 'all.dart' as hm;
+
+main() async {
+  var zone = Zone.current.fork(
+    specification: new ZoneSpecification(print: (self, parent, zone, line) {
+      if (line == 'null') {
+        parent.print(zone, cyan.wrap(StackTrace.current.toString()));
+      }
+    }),
+  );
+  return await zone.run(hm.main);
+}