Precompilation:

runtime/vm/dart_api_impl.cc

 // Copyright (c) 2013, 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_api.h"
 #include "include/dart_mirrors_api.h"
 #include "include/dart_native_api.h"
 
 #include "platform/assert.h"
 #include "vm/class_finalizer.h"
@@ skipping 3595 matching lines @@
     RETURN_TYPE_ERROR(Z, type, Type);
   }
   Type& type_obj = Type::Handle();
   type_obj ^= unchecked_type.raw();
   if (!type_obj.IsFinalized()) {
     return Api::NewError(
         "%s expects argument 'type' to be a fully resolved type.",
         CURRENT_FUNC);
   }
   Class& cls = Class::Handle(Z, type_obj.type_class());
-#if defined(DEBUG)
-  if (!cls.is_allocated() && Dart::IsRunningPrecompiledCode()) {
-    return Api::NewError("Precompilation dropped '%s'", cls.ToCString());
-  }
-#endif
   TypeArguments& type_arguments =
       TypeArguments::Handle(Z, type_obj.arguments());
 
   const String& base_constructor_name = String::Handle(Z, cls.Name());
 
   // And get the name of the constructor to invoke.
   String& dot_name = String::Handle(Z);
   result = Api::UnwrapHandle(constructor_name);
   if (result.IsNull()) {
     dot_name = Symbols::Dot().raw();
@@ skipping 39 matching lines @@
       }
       redirect_type ^= redirect_type.Canonicalize();
     }
 
     type_obj = redirect_type.raw();
     type_arguments = redirect_type.arguments();
 
     cls = type_obj.type_class();
   }
   if (constructor.IsGenerativeConstructor()) {
+#if defined(DEBUG)
+    if (!cls.is_allocated() && Dart::IsRunningPrecompiledCode()) {
+      return Api::NewError("Precompilation dropped '%s'", cls.ToCString());
+    }
+#endif
     // Create the new object.
     new_object = Instance::New(cls);
   }
 
   // Create the argument list.
   intptr_t arg_index = 0;
   int extra_args = (constructor.IsGenerativeConstructor() ? 2 : 1);
   const Array& args =
       Array::Handle(Z, Array::New(number_of_arguments + extra_args));
   if (constructor.IsGenerativeConstructor()) {
@@ skipping 2228 matching lines @@
                                    ApiReallocate);
   writer.WriteFullSnapshot();
   *vm_isolate_snapshot_size = writer.VmIsolateSnapshotSize();
   *isolate_snapshot_size = writer.IsolateSnapshotSize();
   *instructions_snapshot_size = writer.InstructionsSnapshotSize();
 
   return Api::Success();
 }
 
 }  // namespace dart