Deal with unhandled exceptions the same way in all Dart api functions.

runtime/vm/snapshot_test.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/snapshot.h"
 
 #include "vm/assert.h"
 #include "vm/bigint_operations.h"
 #include "vm/class_finalizer.h"
 #include "vm/unit_test.h"
@@ skipping 350 matching lines @@
     timer2.Stop();
     OS::PrintErr("From Snapshot: %dus\n", timer2.TotalElapsedTime());
 
     // Invoke a function which returns an object.
     result = Dart_InvokeStatic(TestCase::lib(),
                                Dart_NewString("FieldsTest"),
                                Dart_NewString("testMain"),
                                0,
                                NULL);
     EXPECT_VALID(result);
-    EXPECT(!Dart_ExceptionOccurred(result));
 
     Dart_ExitScope();  // Exit the Dart API scope.
   }
   Dart_ShutdownIsolate();
 
   free(buffer);
 }
 
 
 UNIT_TEST_CASE(FullSnapshot1) {
@@ skipping 26 matching lines @@
     SnapshotWriter writer(true, &buffer, &allocator);
     writer.WriteFullSnapshot();
 
     // Invoke a function which returns an object.
     Dart_Handle result = Dart_InvokeStatic(lib,
                                Dart_NewString("FieldsTest"),
                                Dart_NewString("testMain"),
                                0,
                                NULL);
     EXPECT_VALID(result);
-    EXPECT(!Dart_ExceptionOccurred(result));
 
     Dart_ExitScope();  // Exit the Dart API scope.
   }
   Dart_ShutdownIsolate();
 
   // Now Create another isolate using the snapshot and execute a method
   // from the script.
   Timer timer2(true, "Snapshot_test");
   timer2.Start();
   Dart_CreateIsolate(buffer, NULL);
   {
     Dart_EnterScope();  // Start a Dart API scope for invoking API functions.
     timer2.Stop();
     OS::PrintErr("From Snapshot: %dus\n", timer2.TotalElapsedTime());
 
     // Invoke a function which returns an object.
     Dart_Handle result = Dart_InvokeStatic(TestCase::lib(),
                                Dart_NewString("FieldsTest"),
                                Dart_NewString("testMain"),
                                0,
                                NULL);
+    if (Dart_IsError(result)) {
+      // Print the error.  It is probably an unhandled exception.
+      fprintf(stderr, "%s\n", Dart_GetError(result));
+    }
     EXPECT_VALID(result);
-    if (Dart_ExceptionOccurred(result)) {
-      // Print the exception object.
-      fprintf(stderr, "An unhandled exception has been thrown\n");
-      Dart_Handle exception_result = Dart_GetException(result);
-      assert(Dart_IsValid(exception_result));
-      const char* obj_cstring = NULL;
-      Dart_Handle retstr = Dart_StringToCString(exception_result, &obj_cstring);
-      if (!Dart_IsValid(retstr)) {
-        obj_cstring = Dart_GetError(retstr);
-      }
-      fprintf(stderr, "%s", obj_cstring);
-    }
-    EXPECT(!Dart_ExceptionOccurred(result));
 
     Dart_ExitScope();  // Exit the Dart API scope.
   }
   Dart_ShutdownIsolate();
 
   free(buffer);
 }
 #endif  // TARGET_ARCH_IA32.
 
 }  // namespace dart