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Description
Despite CL 41374, I'm seeing a bunch of trybot failures like https://storage.googleapis.com/go-build-log/6c83b9bd/linux-amd64_cce08b9e.log:
--- FAIL: TestSetGCPercent (0.17s)
garbage_test.go:151: NextGC = 172 MB, want 150±20 MB
cc @aclements