use while loop for iterating

The other method limits the number of results without taking the
constraints into account.

Fixes GH-7883

src/Symfony/Component/HttpKernel/Profiler/FileProfilerStorage.php

@@ -58,10 +58,7 @@ class FileProfilerStorage implements ProfilerStorageInterface
         fseek($file, 0, SEEK_END);
 
         $result = array();
-
+        while (count($result) < $limit && $line = $this->readLineFromFile($file)) {
-        while ($limit > 0) {
-            $line = $this->readLineFromFile($file);
-
             if (false === $line) {
                 break;
             }
@@ -84,7 +81,6 @@ class FileProfilerStorage implements ProfilerStorageInterface
                 'time'   => $csvTime,
                 'parent' => $csvParent,
             );
-            --$limit;
         }
 
         fclose($file);

src/Symfony/Component/HttpKernel/Tests/Profiler/AbstractProfilerStorageTest.php

@@ -183,6 +183,21 @@ abstract class AbstractProfilerStorageTest extends \PHPUnit_Framework_TestCase
         $this->getStorage()->purge();
     }
 
+    public function testRetrieveByMethodAndLimit()
+    {
+        foreach (array('POST', 'GET') as $method) {
+            for ($i = 0; $i < 5; $i++) {
+                $profile = new Profile('token_'.$i.$method);
+                $profile->setMethod($method);
+                $this->getStorage()->write($profile);
+            }
+        }
+
+        $this->assertCount(5, $this->getStorage()->find('', '', 5, 'POST'));
+
+        $this->getStorage()->purge();
+    }
+
     public function testPurge()
     {
         $profile = new Profile('token1');