## 1 SASL Release Notes

This document describes the changes made to the SASL application.

### 1.1 SASL 2.1.2

#### 1.1.1 Fixed Bugs and Malfunctions

- Fixed some minor bugs in `release_handler` found by Dialyzer.
  Own Id: OTP-6039

### 1.2 SASL 2.1.1

#### 1.2.1 Improvements and New Features

- Added a number of functions to `release_handler` which makes it possible to test upgrade and downgrade of applications according to an `.appup` file "on the fly":
  - `upgrade_app/2`
  - `upgrade_script/2`
  - `downgrade_app/2,3`
  - `downgrade_script/3`
  - `eval_appup_script/4`
  Own Id: OTP-5858

### 1.3 SASL 2.1

#### 1.3.1 Improvements and New Features

- A new option `{update_paths,Bool}` has been added for `release_handler:install_release/2`. It indicates if all application code paths should be updated (`Bool==true`), or if only code paths for modified applications should be updated (`Bool==false`, default).
  `release_handler:set_unpacked/2` now returns an error tuple if a specified application directory does not exist.
  *** POTENTIAL INCOMPATIBILITY ***
  Own Id: OTP-5761

### 1.4 SASL 2.0.1

#### 1.4.1 Improvements and New Features

- A bug that made it impossible to call `rb:show(N)` (`N` being an integer) twice without getting an error has been fixed.
  Own Id: OTP-5287

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