bug #19685 [DI][2.7] Include dynamic services in alternatives (ro0NL)

This PR was merged into the 2.7 branch.

Discussion
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[DI][2.7] Include dynamic services in alternatives

| Q             | A
| ------------- | ---
| Branch?       | 2.7
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | comma-separated list of tickets fixed by the PR, if any
| License       | MIT
| Doc PR        | reference to the documentation PR, if any

Commits
-------

428b5cc include dynamic services in list of alternatives

Author: nicolas-grekas

src/Symfony/Component/DependencyInjection/Container.php

@@ -287,10 +287,10 @@ public function get($id, $invalidBehavior = self::EXCEPTION_ON_INVALID_REFERENCE
                     }
 
                     $alternatives = array();
-                    foreach ($this->services as $key => $associatedService) {
-                        $lev = levenshtein($id, $key);
-                        if ($lev <= strlen($id) / 3 || false !== strpos($key, $id)) {
-                            $alternatives[] = $key;
+                    foreach ($this->getServiceIds() as $knownId) {
+                        $lev = levenshtein($id, $knownId);
+                        if ($lev <= strlen($id) / 3 || false !== strpos($knownId, $id)) {
+                            $alternatives[] = $knownId;
                         }
                     }
 

src/Symfony/Component/DependencyInjection/Tests/ContainerTest.php

@@ -219,7 +219,6 @@ public function testGetThrowServiceNotFoundException()
     {
         $sc = new ProjectServiceContainer();
         $sc->set('foo', $foo = new \stdClass());
-        $sc->set('bar', $foo = new \stdClass());
         $sc->set('baz', $foo = new \stdClass());
 
         try {