Ignore breaking file in Phan config

projects/packages/jetpack-mu-wpcom/.phan/config.php

@@ -13,8 +13,8 @@
 return make_phan_config(
 	dirname( __DIR__ ),
 	array(
-		'+stubs'          => array( 'full-site-editing', 'photon-opencv', 'wpcom' ),
-		'parse_file_list' => array(
+		'+stubs'                          => array( 'full-site-editing', 'photon-opencv', 'wpcom' ),
+		'parse_file_list'                 => array(
 			// Reference files to handle code checking for stuff from Jetpack-the-plugin or other in-monorepo plugins.
 			// Wherever feasible we should really clean up this sort of thing instead of adding stuff here.
 			//
@@ -27,5 +27,10 @@
 			__DIR__ . '/../../../plugins/jetpack/class-jetpack-stats-dashboard-widget.php', // class Jetpack_Stats_Dashboard_Widget
 			__DIR__ . '/../../../plugins/jetpack/modules/masterbar/nudges/bootstrap.php',   // function Automattic\Jetpack\Dashboard_Customizations\register_css_nudge_control  phpcs:ignore Squiz.PHP.CommentedOutCode.Found
 		),
+		'exclude_analysis_directory_list' => array(
+			// This file breaks analysis, Phan gets lost recursing in trying to figure out some types.
+			// @todo Add type declarations so Phan won't have to do it itself. Or update to a modern less lib.
+			'src/features/custom-css/custom-css/preprocessors/lessc.inc.php',
+		),
 	)
 );