b48d944165
When external tools like `rustfmt` calls to `reset_err_count` for handler reusing, it will set the error count on the handler to 0, but since https://github.com/rust-lang/rust/pull/47146 the handler will contain status that will prevent the error count to be bumped if this handler is reused. This caused `rustfmt` idempotency tests to fail: https://github.com/rust-lang-nursery/rustfmt/issues/2338 Fixes: https://github.com/rust-lang-nursery/rustfmt/issues/2338