Observed on OS X 10.11.4 with latest Arcanist (just updated).
Here's the output of arc lint:
$ arc lint --everything PHP Warning: PHP Startup: Unable to load dynamic library '/Applications/Server.app/Contents/ServerRoot/usr/lib/php/extensions/no-debug-non-zts-20100525/pdo_pgsql.so' - dlopen(/Applications/Server.app/Contents/ServerRoot/usr/lib/php/extensions/no-debug-non-zts-20100525/pdo_pgsql.so, 9): image not found in Unknown on line 0 PHP Warning: PHP Startup: Unable to load dynamic library '/Applications/Server.app/Contents/ServerRoot/usr/lib/php/extensions/no-debug-non-zts-20100525/pgsql.so' - dlopen(/Applications/Server.app/Contents/ServerRoot/usr/lib/php/extensions/no-debug-non-zts-20100525/pgsql.so, 9): image not found in Unknown on line 0 >>> Lint for Apple/OSX/Assets.xcassets/card-menu.imageset/icn-gear@2x.png: Error (NAME1) Bad Filename Name files using only letters, numbers, period, hyphen and underscore. >>> Lint for Apple/OSX/Assets.xcassets/checkbox-filled.imageset/icn-check-filled@2x.png: Error (NAME1) Bad Filename Name files using only letters, numbers, period, hyphen and underscore. >>> Lint for Apple/OSX/Assets.xcassets/checkbox-unfilled.imageset/icn-check-nofill@2x.png: Error (NAME1) Bad Filename Name files using only letters, numbers, period, hyphen and underscore. >>> Lint for Apple/OSX/Assets.xcassets/comment-icon.imageset/icn-comment@2x.png: (truncated)
And here it is as seen in Terminal:
The placement of blank lines makes it hard to see at a glance which file is affected by which lint warning / error. For instance see this output group:
Error (NAME1) Bad Filename
Name files using only letters, numbers, period, hyphen and underscore.
>>> Lint for Apple/OSX/Assets.xcassets/checkbox-unfilled.imageset/icn-check-nofill@2x.png:Actually, the reported error is not for the file specified after >>> but for the file in the previous group!
Here's the output I would expect from arc lint:
$ arc lint --everything >>> Lint for Apple/OSX/Assets.xcassets/card-menu.imageset/icn-gear@2x.png: Error (NAME1) Bad Filename Name files using only letters, numbers, period, hyphen and underscore. >>> Lint for Apple/OSX/Assets.xcassets/checkbox-filled.imageset/icn-check-filled@2x.png: Error (NAME1) Bad Filename Name files using only letters, numbers, period, hyphen and underscore. >>> Lint for Apple/OSX/Assets.xcassets/checkbox-unfilled.imageset/icn-check-nofill@2x.png: Error (NAME1) Bad Filename Name files using only letters, numbers, period, hyphen and underscore. >>> Lint for Apple/OSX/Assets.xcassets/comment-icon.imageset/icn-comment@2x.png: (truncated)