Fix QueryBuilder::getParameter() on parameter names with colons

lib/Doctrine/ORM/AbstractQuery.php

@@ -321,11 +321,13 @@ public function getParameters()
      */
     public function getParameter($key)
     {
+        $key = Query\Parameter::normalizeName($key);
+
         $filteredParameters = $this->parameters->filter(
             function (Query\Parameter $parameter) use ($key) : bool {
                 $parameterName = $parameter->getName();
 
-                return $key === $parameterName || (string) $key === (string) $parameterName;
+                return $key === $parameterName;
             }
         );
 

lib/Doctrine/ORM/Query/Parameter.php

@@ -30,6 +30,18 @@
  */
 class Parameter
 {
+    /**
+     * Returns the internal representation of a parameter name.
+     *
+     * @param string|int $name The parameter name or position.
+     *
+     * @return string The normalized parameter name.
+     */
+    public static function normalizeName($name)
+    {
+        return trim((string) $name, ':');
+    }
+
     /**
      * The parameter name.
      *
@@ -67,7 +79,7 @@ class Parameter
      */
     public function __construct($name, $value, $type = null)
     {
-        $this->name          = trim($name, ':');
+        $this->name          = self::normalizeName($name);
         $this->typeSpecified = $type !== null;
 
         $this->setValue($value, $type);

lib/Doctrine/ORM/QueryBuilder.php

@@ -602,11 +602,13 @@ public function getParameters()
      */
     public function getParameter($key)
     {
+        $key = Query\Parameter::normalizeName($key);
+
         $filteredParameters = $this->parameters->filter(
             function (Query\Parameter $parameter) use ($key) : bool {
                 $parameterName = $parameter->getName();
 
-                return $key === $parameterName || (string) $key === (string) $parameterName;
+                return $key === $parameterName;
             }
         );
 

tests/Doctrine/Tests/ORM/Functional/Ticket/GH8106Test.php

@@ -0,0 +1,54 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Doctrine\Tests\ORM\Functional\Ticket;
+
+use Doctrine\Tests\OrmFunctionalTestCase;
+
+/**
+ * @group GH-8106
+ */
+class GH8106Test extends OrmFunctionalTestCase
+{
+    /**
+     * {@inheritDoc}
+     */
+    protected function setUp() : void
+    {
+        parent::setUp();
+
+        $this->_schemaTool->createSchema(
+            [
+                $this->_em->getClassMetadata(GH8106User::class),
+            ]
+        );
+    }
+
+    public function testIssue() : void
+    {
+        $user = new GH8106User();
+        $this->_em->persist($user);
+        $this->_em->flush();
+        $this->_em->clear();
+
+        $qb = $this->_em->createQueryBuilder();
+        $qb
+            ->select('u')
+            ->from(GH8106User::class, 'u')
+            ->where('u.id = :id')
+            ->setParameter(':id', 1)
+            ->setParameter(':id', 1);
+
+        $result = $qb->getQuery()->getResult(); // should not throw QueryException
+
+        self::assertCount(1, $result);
+    }
+}
+
+/** @Entity */
+class GH8106User
+{
+    /** @Id @Column(type="integer") @GeneratedValue */
+    public $id;
+}