Some objects have their canonical bit set but don't have the deeply immutable bit set. It's simpler if they have this bit clear so there is only cluster need, and these objects are instances of VM-internal classes that don't really do canonicalization.
Also give the oddballs their header hash while doing the rest of their initialization. This makes it easier to use the as snapshot base objects when there is no finalize VM isolate step.
TEST=ci
Change-Id: I7bdf7dc59b04ae30f49c5c67c0dc4f69c2d2524f
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/497121
Reviewed-by: Alexander Aprelev <aam@google.com>
Commit-Queue: Ryan Macnak <rmacnak@google.com>
Ryan Macnak
f4d7f070a4