[fail] Only warn on unacted effects for strict / non sync modes#16041

Merged

threepointone merged 2 commits intofacebook:masterfrom threepointone:unacted-effects-warning-strict-mode-only

Jul 3, 2019

+89-27

Commits on Jul 2, 2019

only warn on unacted effects for strict / non sync modes
threepointone
committed

Commits on Jul 3, 2019

explicitly check for modes before warning, explicit tests for all modes
threepointone
committed