Fix Deprecated attribute

Author: ondrejmirtes

src/Reflection/InitializerExprTypeResolver.php

@@ -2008,6 +2008,9 @@ function (Type $type, callable $traverse): Type {
 
 			$constantClassReflection = $this->getReflectionProvider()->getClass($referencedClass);
 			if (!$constantClassReflection->hasConstant($constantName)) {
+				if ($constantClassReflection->getName() === 'Attribute' && $constantName === 'TARGET_CONSTANT') {
+					return new ConstantIntegerType(1 << 16);
+				}
 				continue;
 			}
 

tests/PHPStan/Rules/Methods/MethodAttributesRuleTest.php

@@ -62,4 +62,9 @@ public function testBug5898(): void
 		$this->analyse([__DIR__ . '/data/bug-5898.php'], []);
 	}
 
+	public function testDeprecatedAttribute(): void
+	{
+		$this->analyse([__DIR__ . '/data/deprecated-attribute.php'], []);
+	}
+
 }

tests/PHPStan/Rules/Methods/data/deprecated-attribute.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace MethodDeprecatedAttribute;
+
+use Deprecated;
+
+class HelloWorld
+{
+	#[Deprecated]
+	public function sayHello(): void
+	{
+	}
+}