Our mypyc TypedDict tests are failing on master due to the latest typing_extensions release. You can see in this run that the one job that used typing_extensions 4.7.0 failed, but all the others passed: https://github.com/python/mypy/actions/runs/5405782682

And on this PR, which is using 4.7.0 on all jobs, the mypyc TypedDict tests are failing on all jobs: #15541

Cc. @JelleZijlstra