I'm hitting this error when linting rPHU:
```
> arc lint --everything
[2014-06-09 18:15:43] ERROR 8: Array to string conversion at [/home/joshua/dotfiles/modules/phabricator/arcanist/src/lint/linter/ArcanistXHPASTLinter.php:465]
#0 ArcanistXHPASTLinter::lintPHP53Functions(Object XHPASTNode) called at [/home/joshua/dotfiles/modules/phabricator/arcanist/src/lint/linter/ArcanistXHPASTLinter.php:445]
#1 ArcanistXHPASTLinter::lintPHP53Features(Object XHPASTNode)
#2 call_user_func(Array of size 2 starting with: { 0 => Object ArcanistXHPASTLinter }, Object XHPASTNode) called at [/home/joshua/dotfiles/modules/phabricator/arcanist/src/lint/linter/ArcanistXHPASTLinter.php:266]
#3 ArcanistXHPASTLinter::resolveFuture(scripts/__init_script__.php, Object ExecFuture) called at [/home/joshua/dotfiles/modules/phabricator/arcanist/src/lint/linter/ArcanistFutureLinter.php:28]
#4 ArcanistFutureLinter::didRunLinters() called at [/home/joshua/dotfiles/modules/phabricator/arcanist/src/lint/engine/ArcanistLintEngine.php:436]
#5 ArcanistLintEngine::didRunLinters(Array of size 10 starting with: { 2 => Object ArcanistGeneratedLinter }) called at [/home/joshua/dotfiles/modules/phabricator/arcanist/src/lint/engine/ArcanistLintEngine.php:317]
#6 ArcanistLintEngine::run() called at [/home/joshua/dotfiles/modules/phabricator/arcanist/src/workflow/ArcanistLintWorkflow.php:336]
#7 ArcanistLintWorkflow::run() called at [/home/joshua/dotfiles/modules/phabricator/arcanist/scripts/arcanist.php:322]
```