**Setup**
* MediaWiki 1.29.0-rc.0 (c749bf6) 14:52, 25 May 2017
* PHP 5.6.30-0+deb8u1 (apache2handler)
* MariaDB 10.0.31-MariaDB-1~jessie
Upgrading from 1.28.1
Steps done:
1. Pull latest code and checkout code for MediaWiki and installed extensions
2. Run composer update
3. Run update.php
Step 3 fails because of
```
PHP Fatal error: Class 'Wikimedia\\Timestamp\\ConvertibleTimestamp' not found in /.../w/includes/MWTimestamp.php on line 32
```
Steps to continue:
4. Removed "composer.local.json"
5. Run composer update
6. run update.php
Wiki is on MW 1.29.0-rc.0 and works.
Steps to continue:
7. Added "composer.local.json"
8. Run composer update
Wiki does still continue to run, now with the extra extensions, however when trying to run update.php (for fun) I get
```
PHP Fatal error: Class 'MWTimestamp' not found in /.../w/includes/GlobalFunctions.php on line 1996
Fatal error: Class 'MWTimestamp' not found in /.../w/includes/GlobalFunctions.php on line 1996
```
The log says
```
PHP Warning: require(/.../w/vendor/composer/../../includes/compat/Timestamp.php): failed to open stream: No such file or directory in /.../vendor/composer/autoload_real.php on line 66
PHP Fatal error: require(): Failed opening required '/.../w/vendor/composer/../../includes/compat/Timestamp.php' (include_path='.:/usr/share/php:/usr/share/pear') in /.../w/vendor/composer/autoload_real.php on line 66 ```
So something seems to munch the timestamps stuff.