[Icons] ux:icons:lock fails #2719
Description
Executing ux:icons:lock in my application throws an exception:
You must call one of in() or append() methods before iterating over a Finder.
Exception trace:
at /Users/andrey/Sites/nations/vendor/symfony/finder/Finder.php:667
Symfony\Component\Finder\Finder->getIterator() at /Users/andrey/Sites/nations/vendor/symfony/ux-icons/src/Twig/IconFinder.php:74
Symfony\UX\Icons\Twig\IconFinder->templateFiles() at /Users/andrey/Sites/nations/vendor/symfony/ux-icons/src/Twig/IconFinder.php:81
Symfony\UX\Icons\Twig\IconFinder->templateFiles() at /Users/andrey/Sites/nations/vendor/symfony/ux-icons/src/Twig/IconFinder.php:45
Symfony\UX\Icons\Twig\IconFinder->icons() at /Users/andrey/Sites/nations/vendor/symfony/ux-icons/src/Command/LockIconsCommand.php:64
Symfony\UX\Icons\Command\LockIconsCommand->execute() at /Users/andrey/Sites/nations/vendor/symfony/console/Command/Command.php:279
Symfony\Component\Console\Command\Command->run() at /Users/andrey/Sites/nations/vendor/symfony/console/Application.php:1094
Symfony\Component\Console\Application->doRunCommand() at /Users/andrey/Sites/nations/vendor/symfony/framework-bundle/Console/Application.php:123
Symfony\Bundle\FrameworkBundle\Console\Application->doRunCommand() at /Users/andrey/Sites/nations/vendor/symfony/console/Application.php:342
Symfony\Component\Console\Application->doRun() at /Users/andrey/Sites/nations/vendor/symfony/framework-bundle/Console/Application.php:77
Symfony\Bundle\FrameworkBundle\Console\Application->doRun() at /Users/andrey/Sites/nations/vendor/symfony/console/Application.php:193
Symfony\Component\Console\Application->run() at /Users/andrey/Sites/nations/vendor/contao/manager-bundle/bin/contao-console:40
include() at /Users/andrey/Sites/nations/vendor/bin/contao-console:119
It comes from the Finder call in this method:
ux/src/Icons/src/Twig/IconFinder.php
Lines 67 to 77 in 06b78be
The application uses a chain of loaders, last of which is normal Twig\Loader\FilesystemLoader. $loader->getNamespaces() returns empty array, so the $paths is also an empty array, which makes Finder throw.
Adding simple if (!empty($paths)) check fixed it for me, but if it's not correct then I will need some help. This is not a pure Symfony app, but an instance of Contao CMS, which is built on top of Symfony, so may be some configuration needs to be adjusted instead. I am ready to debug it further if somebody points me to the right direction.