# Tenzir Node v4.19.6 ## 馃殌 Features ### Implement the `assert` operator Aug 14, 2024 路 [@dominiklohmann](https://github.com/dominiklohmann) 路 [#4506](https://github.com/tenzir/tenzir/pull/4506) The `tenzir` command-line utility gained a new option `--strict`, causing it to exit with a non-zero exit code for pipelines that emit at least one warning. ## 馃悶 Bug Fixes ### Fix a potentially uncaught exception in `shell` Aug 15, 2024 路 [@dominiklohmann](https://github.com/dominiklohmann) 路 [#4508](https://github.com/tenzir/tenzir/pull/4508) We fixed a bug in the `shell` operator that could cause the process to crash when breaking its pipe. Now, the operator shuts down with an error diagnostic instead. Pipelines with the `python` operator now deploy more quickly, as their deployment no longer waits for the virtual environment to be set up successfully. ### Fix `slice 1:-1` for exactly one event Aug 14, 2024 路 [@dominiklohmann](https://github.com/dominiklohmann) 路 [#4505](https://github.com/tenzir/tenzir/pull/4505) The `slice` operator no longer crashes when used with a positive begin and negative end value when operating on less events than `-end`, e.g., when working on a single event and using `slice 0:-1`. [ Download on GitHub ](https://github.com/tenzir/tenzir/releases/tag/v4.19.6) [Get the release artifacts and source code.](https://github.com/tenzir/tenzir/releases/tag/v4.19.6)