c4a7c3488e
This gets rid of a slow AssertAssignable (function type test)
in _asyncThenWrapperHelper/_awaitHelper, which currently falls back to the slow table
search:
AssertAssignable
^--> TypeTestingStub
^--> SlowTypeTestStub
^--> Subtype6TestCacheStub
Issue https://github.com/dart-lang/sdk/issues/37668
Change-Id: I3b6517b7e348e39619e8096d6ac2a4b179bb3242
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/142022
Commit-Queue: Martin Kustermann <kustermann@google.com>
Reviewed-by: Alexander Markov <alexmarkov@google.com>
Reviewed-by: Clement Skau <cskau@google.com>