Right, but as far as I know those preserve language semantics and are stricter in debug mode than in release mode. The way I interpreted ncmncm's comment was th

Right, but as far as I know those preserve language semantics and are stricter in debug mode than in release mode. The way I interpreted ncmncm's comment was that the suggested build-even-with-borrowck-errors was the opposite - different language semantics, and something that compiles in debug mode won't compile in release mode.