[kernel] Fix getter, run service tests in debug mode

runtime/vm/kernel_to_il.cc

Index: runtime/vm/kernel_to_il.cc
diff --git a/runtime/vm/kernel_to_il.cc b/runtime/vm/kernel_to_il.cc
index e4204fd6539343ecb732169d47736cbaf6724221..4377618e4d588792f8019d4f0729e642f685a6cd 100644
--- a/runtime/vm/kernel_to_il.cc
+++ b/runtime/vm/kernel_to_il.cc
@@ -3551,7 +3551,6 @@ FlowGraph* FlowGraphBuilder::BuildGraphOfFieldAccessor(
   } else {
     // The field always has an initializer because static fields without
     // initializers are initialized eagerly and do not have implicit getters.
-    ASSERT(field.has_initializer());

[Kevin Millikin (Google), 2017/03/22 13:09:38]

I think the ASSERT is indicating that something is not behaving the way we
expect.

The fix is probably to add this at the beginning of
KernelReader::GenerateFieldAccessors:

  if (kernel_field->IsStatic() && kernel_field->initializer() == NULL) {
    field.SetStaticValue(Instance::Handle(Z), true);
    return;
  }

     body += Constant(field);
     body += InitStaticField(field);
     body += Constant(field);