negate_unsigned feature gate (librustc_lint/builtin.rs) currently emits a warning instead of actual feature_gate due to backwards compatibility concerns. After some time passes this warning should be converted to feature gate.
Basically, reverting the “Convert negate_unsigned feature gate to a warning” commit (0ca8e49) from #27026 and fixing up conflicts (if any) should do.
Note to any people who are planning to do this: ask somebody from language team whether enough time has passed since we started to emit the warning before submitting a PR.
negate_unsigned feature gate (librustc_lint/builtin.rs) currently emits a warning instead of actual feature_gate due to backwards compatibility concerns. After some time passes this warning should be converted to feature gate.
Basically, reverting the “Convert negate_unsigned feature gate to a warning” commit (0ca8e49) from #27026 and fixing up conflicts (if any) should do.
Note to any people who are planning to do this: ask somebody from language team whether enough time has passed since we started to emit the warning before submitting a PR.