```
22:38:59 28) ResourcesTest::testResourceFiles
22:38:59 Creation of dynamic property Less_Tree_Variable::$parensInOp is deprecated
22:38:59
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:2313
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:2328
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:808
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:2450
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:808
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:1159
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:1140
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:808
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:2427
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:2290
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:2328
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:808
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:2450
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:808
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:1159
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:1140
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:808
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:2427
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:2290
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:2328
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:808
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:2450
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:2254
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:808
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:1966
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:808
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:954
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:1843
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:1897
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:808
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:954
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:1843
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:1897
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:808
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:954
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:635
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:585
22:38:59 /workspace/src/vendor/wikimedia/less.php/lib/Less/Parser.php:426
22:38:59 /workspace/src/includes/ResourceLoader/FileModule.php:1127
22:38:59 /workspace/src/includes/ResourceLoader/FileModule.php:1010
22:38:59 /workspace/src/includes/ResourceLoader/FileModule.php:986
22:38:59 /workspace/src/includes/ResourceLoader/FileModule.php:964
22:38:59 /workspace/src/vendor/wikimedia/testing-access-wrapper/src/TestingAccessWrapper.php:114
22:38:59 /workspace/src/tests/phpunit/structure/ResourcesTest.php:297
22:38:59 /workspace/src/tests/phpunit/MediaWikiIntegrationTestCase.php:500
22:38:59 /workspace/src/tests/phpunit/phpunit.php:101
22:38:59 /workspace/src/tests/phpunit/phpunit.php:153
```
https://github.com/wikimedia/less.php/commit/a93b0827b650a347f7c694e1e234f8c86efa8812 seemingly fixed this... Which is in v3.2.0 and v3.2.1...
1.39 currently has v3.1.0.
https://github.com/wikimedia/less.php/compare/v3.1.0...v3.2.1