extension.php script cannot disable/remove broken extensions

I created an extension called index-page-title. I suspected
this might cause problems as I used dashes instead of underscores
in the extension name, but I did it anyway.

Then I proceeded to install the extension:

athena% ~/opt/php54/bin/php extensions.php list
Enabled:

• phpbb3-ext-overall-header-addition
• phpbb3-ext-prosilver-overall-header-addition
• phpbb3-ext-subsilver-overall-header-addition

Disabled:

Available:

• index-page-title
  athena% ~/opt/php54/bin/php extensions.php enable index-page-title
  athena% ~/opt/php54/bin/php extensions.php list

Fatal error: Class 'phpbb_ext_index-page-title_event_index_page_title_subscriber' not found in /var/www/qi/boards/x3/includes/event/extension_subscriber_loader.php on line 39
athena% ~/opt/php54/bin/php extensions.php disable index-page-title

Fatal error: Class 'phpbb_ext_index-page-title_event_index_page_title_subscriber' not found in /var/www/qi/boards/x3/includes/event/extension_subscriber_loader.php on line 39
athena%

Now I am stuck as I cannot remove the problematic extension.

After rm -rf'ing the extension directory I was able to disable it.

The issue here is all code from extensions is loaded when I am trying
to manage extensions. Therefore if there is a fatal error in any of that code
I lose the ability to manage extensions.

common.php should be split to have a extension-load-less version for
extension management perhaps?