Correctly load aliases in lockedRepository to fix alias install output

src/Composer/Package/Locker.php

@@ -171,8 +171,19 @@ class Locker
         }
 
         if (isset($lockedPackages[0]['name'])) {
+            $packageByName = array();
             foreach ($lockedPackages as $info) {
-                $packages->addPackage($this->loader->load($info));
+                $package = $this->loader->load($info);
+                $packages->addPackage($package);
+                $packageByName[$package->getName()] = $package;
+            }
+
+            if (isset($lockData['aliases'])) {
+                foreach ($lockData['aliases'] as $alias) {
+                    if (isset($packageByName[$alias['package']])) {
+                        $packages->addPackage(new AliasPackage($packageByName[$alias['package']], $alias['alias_normalized'], $alias['alias']));
+                    }
+                }
             }
 
             return $packages;

tests/Composer/Test/Fixtures/installer/aliased-priority-conflicting.test

@@ -43,6 +43,45 @@ Aliases take precedence over default package even if default is selected
     },
     "minimum-stability": "dev"
 }
+--EXPECT-LOCK--
+{
+    "packages": [
+        {
+            "name": "a/a", "version": "dev-master",
+            "require": { "a/req": "dev-master" },
+            "type": "library"
+        },
+        {
+            "name": "a/b", "version": "dev-master",
+            "require": { "a/req": "dev-master" },
+            "type": "library"
+        },
+        {
+            "name": "a/req", "version": "dev-feature-foo",
+            "source": { "reference": "feat.f", "type": "git", "url": "" },
+            "type": "library"
+        }
+    ],
+    "packages-dev": [],
+    "aliases": [
+        {
+            "alias": "dev-master",
+            "alias_normalized": "9999999-dev",
+            "version": "dev-feature-foo",
+            "package": "a/req"
+        }
+    ],
+    "minimum-stability": "dev",
+    "stability-flags": {
+        "a/a": 20,
+        "a/b": 20,
+        "a/req": 20
+    },
+    "prefer-stable": false,
+    "prefer-lowest": false,
+    "platform": [],
+    "platform-dev": []
+}
 --RUN--
 install
 --EXPECT--