If at first you don't succeed...

runtime/vm/debugger_api_impl_test.cc

 // Copyright (c) 2012, 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 "include/dart_debugger_api.h"
 #include "platform/assert.h"
 #include "vm/dart_api_impl.h"
 #include "vm/unit_test.h"
 
 namespace dart {
@@ skipping 180 matching lines @@
   func = test_lib.LookupFunctionInSource(script_url, 6);
   EXPECT(func.IsNull());
   func = test_lib.LookupFunctionInSource(script_url, 10);
   EXPECT(func.IsNull());
 
   Dart_Handle libs = Dart_GetLibraryURLs();
   EXPECT(Dart_IsList(libs));
   intptr_t num_libs;
   Dart_ListLength(libs, &num_libs);
   EXPECT(num_libs > 0);
-  for (intptr_t i = 0; i < num_libs; i++) {
+  for (int i = 0; i < num_libs; i++) {
     Dart_Handle lib_url = Dart_ListGetAt(libs, i);
     EXPECT(Dart_IsString(lib_url));
     char const* chars;
     Dart_StringToCString(lib_url, &chars);
-    printf("Lib %ld: %s\n", i, chars);
+    printf("Lib %d: %s\n", i, chars);
 
     Dart_Handle scripts = Dart_GetScriptURLs(lib_url);
     EXPECT(Dart_IsList(scripts));
     intptr_t num_scripts;
     Dart_ListLength(scripts, &num_scripts);
     EXPECT(num_scripts >= 0);
     for (intptr_t i = 0; i < num_scripts; i++) {
       Dart_Handle script_url = Dart_ListGetAt(scripts, i);
       char const* chars;
       Dart_StringToCString(script_url, &chars);
-      printf("  script %ld: '%s'\n", i + 1, chars);
+      printf("  script %d: '%s'\n", i + 1, chars);
     }
   }
 
   Dart_Handle lib_url = Dart_NewString(TestCase::url());
   Dart_Handle source = Dart_GetScriptSource(lib_url, lib_url);
   EXPECT(Dart_IsString(source));
   char const* source_chars;
   Dart_StringToCString(source, &source_chars);
   printf("\n=== source: ===\n%s", source_chars);
   EXPECT_STREQ(kScriptChars, source_chars);
 }
 
 #endif  // defined(TARGET_ARCH_IA32) || defined(TARGET_ARCH_X64).
 
 }  // namespace dart