# 0.1.9 (July 8, 2020)

### Added

- Support for arbitrary expressions as fields in `#[instrument]` (#672)

### Changed

- `#[instrument]` now emits a compiler warning when ignoring 
  unrecognized input (#672, #786)

Fixes #785 

Signed-off-by: Eliza Weisman <eliza@buoyant.io>