Fix internal error when accessing enum case by class-string

src/Reflection/InitializerExprTypeResolver.php

@@ -1858,6 +1858,13 @@ function (Type $type, callable $traverse): Type {
 			);
 		}
 
+		if ($constantClassType->isClassStringType()->yes()) {
+			if ($constantClassType->isConstantScalarValue()->yes()) {
+				$isObject = false;
+			}
+			$constantClassType = $constantClassType->getClassStringObjectType();
+		}
+
 		$types = [];
 		foreach ($constantClassType->getObjectClassNames() as $referencedClass) {
 			if (!$this->getReflectionProvider()->hasClass($referencedClass)) {

tests/PHPStan/Analyser/AnalyserIntegrationTest.php

@@ -1338,6 +1338,16 @@ public function testBug10772(): void
 		$this->assertNoErrors($errors);
 	}
 
+	public function testBug10985(): void
+	{
+		if (PHP_VERSION_ID < 80100) {
+			$this->markTestSkipped('Test requires PHP 8.1.');
+		}
+
+		$errors = $this->runAnalyse(__DIR__ . '/data/bug-10985.php');
+		$this->assertNoErrors($errors);
+	}
+
 	public function testBug10979(): void
 	{
 		if (PHP_VERSION_ID < 80100) {

tests/PHPStan/Analyser/data/bug-10985.php

@@ -0,0 +1,15 @@
+<?php // lint >= 8.1
+
+namespace Bug10985;
+
+use function PHPStan\Testing\assertType;
+
+enum Test {
+	case ORIGINAL;
+}
+
+function (): void {
+	$item = Test::class;
+	$result = ($item)::ORIGINAL;
+	assertType('Bug10985\\Test::ORIGINAL', $result);
+};