Added regression test

Author: staabm

tests/PHPStan/Rules/Comparison/IfConstantConditionRuleTest.php

@@ -179,4 +179,10 @@ public function testBug4864(): void
 		$this->analyse([__DIR__ . '/data/bug-4864.php'], []);
 	}
 
+	public function testBug8926(): void
+	{
+		$this->treatPhpDocTypesAsCertain = true;
+		$this->analyse([__DIR__ . '/data/bug-8926.php'], []);
+	}
+
 }

tests/PHPStan/Rules/Comparison/data/bug-8926.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace Bug8926;
+
+class Foo {
+	private bool $test;
+
+	/** @param int[] $arr */
+	function success(array $arr) : void {
+		$test = false;
+		(function($arr) use(&$test) {
+			$test = count($arr) == 1;
+		})($arr);
+
+		if ($test) {
+			echo "...\n";
+		}
+	}
+
+	/** @param int[] $arr */
+	function error(array $arr) : void {
+		$this->test = false;
+		(function($arr) {
+			$this->test = count($arr) == 1;
+		})($arr);
+
+
+		if ($this->test) {
+			echo "...\n";
+		}
+	}
+}