Add regression test

Closes phpstan/phpstan#11598

Author: takaram

tests/PHPStan/Analyser/AnalyserIntegrationTest.php

@@ -1504,6 +1504,12 @@ public function testBug12214(): void
 		$this->assertNoErrors($errors);
 	}
 
+	public function testBug11598(): void
+	{
+		$errors = $this->runAnalyse(__DIR__ . '/data/bug-11598.php');
+		$this->assertNoErrors($errors);
+	}
+
 	public function testBug11640(): void
 	{
 		$errors = $this->runAnalyse(__DIR__ . '/data/bug-11640.php');

tests/PHPStan/Analyser/data/bug-11598.php

@@ -0,0 +1,16 @@
+<?php declare(strict_types=1);
+
+namespace Bug11598;
+
+use function unserialize;
+
+function(): void {
+	[ // @phpstan-ignore offsetAccess.nonArray
+		'bar' => $foo,
+	] = '';
+
+	// @phpstan-ignore offsetAccess.nonArray
+	[
+		'bar' => $foo,
+	] = '';
+};