build

Fixing context disposal vs. statistics thread #7025

Job	Run time
format-check	4m 2s
docker-tests	21m 22s
compiler-warnings	2m 10s
build-mdbook	4s
integration-tests (ubuntu-latest, oopsla19)	18m 45s
scaladoc-check	3m 1s
integration-tests (ubuntu-latest, arrays)	10m 40s
unit-tests (ubuntu-latest)	4m 56s
integration-tests (macos-latest, oopsla19)	17m 5s
unit-tests (macos-latest)	3m 21s
	1h 25m 26s

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