Add rules for aliased packages when an alias is added, fixes #8902

src/Composer/DependencyResolver/RuleSetGenerator.php

@@ -165,6 +165,7 @@ class RuleSetGenerator
                     $this->addedPackagesByNames[$name][] = $package;
                 }
             } else {
+                $workQueue->enqueue($package->getAliasOf());
                 $this->addRule(RuleSet::TYPE_PACKAGE, $this->createRequireRule($package, array($package->getAliasOf()), Rule::RULE_PACKAGE_ALIAS, $package));
             }
 

tests/Composer/Test/Fixtures/installer/github-issues-8902.test

@@ -34,11 +34,11 @@ Your requirements could not be resolved to an installable set of packages.
 
   Problem 1
     - Root composer.json requires beyondcode/laravel-dump-server ^1.3 -> satisfiable by beyondcode/laravel-dump-server[1.4.0].
-    - beyondcode/laravel-dump-server 1.4.0 requires symfony/var-dumper ^5.0 -> satisfiable by symfony/var-dumper[dev-master].
-    - Root composer.json requires laravel/framework ^6.8 -> satisfiable by laravel/framework[6.8.14].
+    - You can only install one version of a package, so only one of these can be installed: symfony/var-dumper[dev-master, 4.4.0].
+    - don't install symfony/var-dumper 5.2.x-dev|install symfony/var-dumper dev-master
     - laravel/framework 6.8.14 requires symfony/var-dumper ^4.3.4 -> satisfiable by symfony/var-dumper[4.4.0].
-    etc...
-
+    - beyondcode/laravel-dump-server 1.4.0 requires symfony/var-dumper ^5.0 -> satisfiable by symfony/var-dumper[5.2.x-dev (alias of dev-master)].
+    - Root composer.json requires laravel/framework ^6.8 -> satisfiable by laravel/framework[6.8.14].
 
 --EXPECT--