Running any blt command gives php notices

[arknoll]

My system information:

• Operating system type: OSX
• Operating system version: Sierra
• BLT version: 8.9.x

Output of blt doctor:

PHP Notice:  Undefined offset: 3 in /Users/alex.knoll/sites/canary/vendor/acquia/blt/src/Robo/Inspector/Inspector.php on line 534

Notice: Undefined offset: 3 in /Users/alex.knoll/sites/canary/vendor/acquia/blt/src/Robo/Inspector/Inspector.php on line 534
PHP Notice:  Undefined offset: 2 in /Users/alex.knoll/sites/canary/vendor/acquia/blt/src/Robo/Inspector/Inspector.php on line 534

Notice: Undefined offset: 2 in /Users/alex.knoll/sites/canary/vendor/acquia/blt/src/Robo/Inspector/Inspector.php on line 534
PHP Notice:  Undefined offset: 1 in /Users/alex.knoll/sites/canary/vendor/acquia/blt/src/Robo/Inspector/Inspector.php on line 534

Notice: Undefined offset: 1 in /Users/alex.knoll/sites/canary/vendor/acquia/blt/src/Robo/Inspector/Inspector.php on line 534
Attempting to run doctor on host machine...
[Acquia\Blt\Robo\Tasks\DrushTask]  The drush command 'blt-doctor' could not be found.  Run `drush           [error]
cache-clear drush` to clear the commandfile cache if you have
installed new extensions.
[Acquia\Blt\Robo\Tasks\DrushTask]  Exit code 1
[warning] Unable to run the doctor using alias '@canary.local'. Trying with '@self'...
[warning] Unable to run the doctor using alias '@self'. Trying without alias...

When I run this command:

blt doctor

I get the following output:

PHP Notice:  Undefined offset: 3 in /Users/alex.knoll/sites/canary/vendor/acquia/blt/src/Robo/Inspector/Inspector.php on line 534

Notice: Undefined offset: 3 in /Users/alex.knoll/sites/canary/vendor/acquia/blt/src/Robo/Inspector/Inspector.php on line 534
PHP Notice:  Undefined offset: 2 in /Users/alex.knoll/sites/canary/vendor/acquia/blt/src/Robo/Inspector/Inspector.php on line 534

Notice: Undefined offset: 2 in /Users/alex.knoll/sites/canary/vendor/acquia/blt/src/Robo/Inspector/Inspector.php on line 534
PHP Notice:  Undefined offset: 1 in /Users/alex.knoll/sites/canary/vendor/acquia/blt/src/Robo/Inspector/Inspector.php on line 534

Notice: Undefined offset: 1 in /Users/alex.knoll/sites/canary/vendor/acquia/blt/src/Robo/Inspector/Inspector.php on line 534
Attempting to run doctor on host machine...
[Acquia\Blt\Robo\Tasks\DrushTask]  The drush command 'blt-doctor' could not be found.  Run `drush           [error]
cache-clear drush` to clear the commandfile cache if you have
installed new extensions.
[Acquia\Blt\Robo\Tasks\DrushTask]  Exit code 1
[warning] Unable to run the doctor using alias '@canary.local'. Trying with '@self'...
[warning] Unable to run the doctor using alias '@self'. Trying without alias...

Note: I have confirmed that my VM is up and running. Manually running this works correctly:

➜  canary git:(blt-8.9.0) ✗ vagrant status --machine-readable
1496686859,canary,metadata,provider,virtualbox
1496686859,canary,provider-name,virtualbox
1496686859,canary,state,running
1496686859,canary,state-human-short,running
1496686859,canary,state-human-long,The VM is running. To stop this VM%!(VAGRANT_COMMA) you can run `vagrant halt` to\nshut it down forcefully%!(VAGRANT_COMMA) or you can run `vagrant suspend` to simply\nsuspend the virtual machine. In either case%!(VAGRANT_COMMA) to restart it again%!(VAGRANT_COMMA)\nsimply run `vagrant up`.
1496686859,,ui,info,Current machine states:\n\ncanary                    running (virtualbox)\n\nThe VM is running. To stop this VM%!(VAGRANT_COMMA) you can run `vagrant halt` to\nshut it down forcefully%!(VAGRANT_COMMA) or you can run `vagrant suspend` to simply\nsuspend the virtual machine. In either case%!(VAGRANT_COMMA) to restart it again%!(VAGRANT_COMMA)\nsimply run `vagrant up`.

[grasmash]

The responsible commit was reverted.