Error Running Composer Commands

[TheoBearman]

When trying to run composer install -o command following the recent dependency update 02fe8d1, the following error is thrown in the console:

[ErrorException]
Undefined index: hash

[GrahamCampbell]

Please run composer self-update.

[TheoBearman]

Please run composer self-update.

[InvalidArgumentException]
Command "self-update" is not defined.

[GrahamCampbell]

Seems like there's something wrong with your composer. Try running the command in a directory where there is no composer.json file.

It should behave like this:

(or indeed, show the stable channel)