Fix phpstan/phpstan#11181: Allow bare yield after return for empty generators

- Skip bare `yield;` (no key, no value) in getNextUnreachableStatements
- This is a valid PHP idiom (`return; yield;`) to create an empty generator
- Added regression test in tests/PHPStan/Rules/DeadCode/data/bug-11181.php

Author: github-actions[bot]

src/Analyser/NodeScopeResolver.php

@@ -4442,6 +4442,14 @@ private function getNextUnreachableStatements(array $nodes, bool $earlyBinding):
 			if ($node instanceof Node\Stmt\Nop || $node instanceof Node\Stmt\InlineHTML) {
 				continue;
 			}
+			if (
+				$node instanceof Node\Stmt\Expression
+				&& $node->expr instanceof Expr\Yield_
+				&& $node->expr->key === null
+				&& $node->expr->value === null
+			) {
+				continue;
+			}
 			if (!$node instanceof Node\Stmt) {
 				continue;
 			}

tests/PHPStan/Rules/DeadCode/UnreachableStatementRuleTest.php

@@ -397,6 +397,12 @@ public function testBug14328(): void
 		]);
 	}
 
+	public function testBug11181(): void
+	{
+		$this->treatPhpDocTypesAsCertain = true;
+		$this->analyse([__DIR__ . '/data/bug-11181.php'], []);
+	}
+
 	public function testBug14369(): void
 	{
 		$this->treatPhpDocTypesAsCertain = true;

tests/PHPStan/Rules/DeadCode/data/bug-11181.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace Bug11181;
+
+function foo(): \Iterator
+{
+	return;
+	yield;
+}
+
+function bar(): \Generator
+{
+	return;
+	yield;
+}
+
+function baz(): iterable
+{
+	return;
+	yield;
+}