Pass type argument to Field construction, thus freezing that field, denoting it cannot be changed l…

runtime/vm/class_finalizer.cc

Index: runtime/vm/class_finalizer.cc
diff --git a/runtime/vm/class_finalizer.cc b/runtime/vm/class_finalizer.cc
index abc802ae2db9b3655a52158540f7842ac4b1d89d..d8434d9fd4d81fddde2495c494a87137a7a1c43d 100644
--- a/runtime/vm/class_finalizer.cc
+++ b/runtime/vm/class_finalizer.cc
@@ -1314,7 +1314,7 @@ void ClassFinalizer::ResolveAndFinalizeMemberTypes(const Class& cls) {
     field ^= array.At(i);
     type = field.type();
     type = FinalizeType(cls, type, kCanonicalize);
-    field.set_type(type);
+    field.SetFieldType(type);
     name = field.name();
     if (field.is_static()) {
       getter_name = Field::GetterSymbol(name);