---
title: Arez 0.69 released
author: Arez Project
authorURL: https://github.com/arez
---

[Full Changelog](https://github.com/arez/arez/compare/v0.68...v0.69)

Changes in this release:

#### Added
* **\[core\]** Add the build time configuration setting `arez.enable_observer_error_handlers` and default
  it to `true`. Expose the setting as `Arez.areObserverErrorHandlersEnabled()` and update the testing
  infrastructure in the class `ArezTestUtil` to add support for configuring the setting during tests.
  Added assertions to `ArezBuildAsserts` to verify that the `ObserverErrorHandler` classes are stripped
  out of the GWT compiled output when setting is set to `false`. This resulted in a marginally smaller
  output size if the setting is set to `false`.

#### Changed
* The `BuildOutputTest` test has been significantly enhanced to ensure that the result of GWT compilation
  does not include unexpected outputs.

Update site to add news about the 0.69 release
Update site to add news about the 0.69 release
