Added regression test

Author: staabm

tests/PHPStan/Rules/Traits/ConflictingTraitConstantsRuleTest.php

@@ -79,6 +79,11 @@ public function testNativeTypes(): void
 		]);
 	}
 
+	public function testBug11088(): void
+	{
+		$this->analyse([__DIR__ . '/data/bug-11088.php'], []);
+	}
+
 	#[RequiresPhp('>= 8.3')]
 	public function testBug13119(): void
 	{

tests/PHPStan/Rules/Traits/data/bug-11088.php

@@ -0,0 +1,21 @@
+<?php declare(strict_types=1);
+
+namespace Bug11088;
+
+trait Foo
+{
+	protected const ARR1 = [
+		self::KEY => 'int',
+	];
+}
+
+class HelloWorld
+{
+	use Foo;
+
+	protected const KEY = 'k1';
+
+	protected const ARR = self::ARR1 + [
+		'a.b' => 'int',
+	];
+}