Fix build

Author: staabm

tests/PHPStan/Analyser/nsrt/bug-10671.php

@@ -1,4 +1,6 @@
-<?php declare(strict_types=1);
+<?php // lint >= 8.0
+
+declare(strict_types=1);
 
 namespace Bug10671;
 

tests/PHPStan/Analyser/nsrt/bug-10671b.php

@@ -0,0 +1,50 @@
+<?php // lint < 8.0
+
+declare(strict_types=1);
+
+namespace Bug10671b;
+
+use Closure;
+use function PHPStan\Testing\assertType;
+
+/**
+ * @param Closure(mixed...): mixed $closure
+ */
+function callClosure(Closure $closure): void
+{
+}
+
+// Arrow function with variadic - the bug
+callClosure(
+	fn(...$args) => assertType('list', $args)
+);
+
+// Anonymous function with variadic - works correctly
+callClosure(
+	function (...$args) {
+		assertType('list', $args);
+	}
+);
+
+// Arrow function with typed variadic
+callClosure(
+	fn(int ...$args) => assertType('list<int>', $args)
+);
+
+// Arrow function with variadic and preceding params
+/**
+ * @param Closure(string, mixed...): mixed $closure
+ */
+function callClosure2(Closure $closure): void
+{
+}
+
+callClosure2(
+	fn(string $first, ...$rest) => assertType('list', $rest)
+);
+
+callClosure2(
+	function (string $first, ...$rest) {
+		assertType('list', $rest);
+	}
+);