More precise RecursiveIteratorIterator::__construct() types

stubs/iterable.stub

@@ -160,8 +160,8 @@ class RecursiveIteratorIterator
 
 	/**
 	 * @param T $iterator
-	 * @param int $mode
-	 * @param int $flags
+	 * @param self::LEAVES_ONLY|self::SELF_FIRST|self::CHILD_FIRST $mode
+	 * @param 0|self::CATCH_GET_CHILD $flags
 	 */
 	public function __construct(
 		$iterator,

tests/PHPStan/Rules/Classes/InstantiationRuleTest.php

@@ -461,4 +461,14 @@ public function testBug9946(): void
 		$this->analyse([__DIR__ . '/data/bug-9946.php'], []);
 	}
 
+	public function testBug10324(): void
+	{
+		$this->analyse([__DIR__ . '/data/bug-10324.php'], [
+			[
+				'Parameter #3 $flags of class RecursiveIteratorIterator constructor expects 0|16, 2 given.',
+				23
+			]
+		]);
+	}
+
 }

tests/PHPStan/Rules/Classes/data/bug-10324.php

@@ -0,0 +1,33 @@
+<?php
+
+namespace Bug10324;
+
+use RecursiveIteratorIterator;
+use RecursiveDirectoryIterator;
+
+class HelloWorld
+{
+	public function findfile(string $directory, string $filename): ?string
+	{
+		$fontPath = null;
+		$it = new RecursiveDirectoryIterator(
+			$directory,
+			RecursiveDirectoryIterator::SKIP_DOTS
+			| RecursiveDirectoryIterator::FOLLOW_SYMLINKS
+		);
+		foreach (
+			new RecursiveIteratorIterator(
+				$it,
+				RecursiveIteratorIterator::LEAVES_ONLY,
+				//RecursiveIteratorIterator::CATCH_GET_CHILD
+				RecursiveIteratorIterator::CHILD_FIRST
+			) as $file
+		) {
+			if (basename($file) === $filename) {
+				$fontPath = $file;
+				break;
+			}
+		}
+		return $fontPath;
+	}
+}