Matt Bierner e7b3724e0c
Enable no-case-declarations in codebase (#139243)
Fixes #139236

This can catch tricky programming mistakes that cause a runtime error. See 7e266b2c427222011a66486b2d7ac3e4a9953f11 as an example of the type of bug this can prevent
2021-12-15 17:15:35 -08:00
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