Function with yield from wasn't recognized as generator

composer.json

@@ -21,7 +21,7 @@
 		"nette/utils": "^3.1.1",
 		"nikic/php-parser": "^4.5.0",
 		"ondram/ci-detector": "^3.1",
-		"ondrejmirtes/better-reflection": "^4.3.2",
+		"ondrejmirtes/better-reflection": "^4.3.3",
 		"phpdocumentor/type-resolver": "1.0.1",
 		"phpstan/phpdoc-parser": "^0.4.7",
 		"react/child-process": "^0.6.1",

tests/PHPStan/Rules/Functions/ReturnTypeRuleTest.php

@@ -70,4 +70,13 @@ public function testReturnTypeRulePhp70(): void
 		]);
 	}
 
+	public function testIsGenerator(): void
+	{
+		if (!self::$useStaticReflectionProvider) {
+			$this->markTestSkipped('Test requires static reflection.');
+		}
+
+		$this->analyse([__DIR__ . '/data/is-generator.php'], []);
+	}
+
 }

tests/PHPStan/Rules/Functions/data/is-generator.php

@@ -0,0 +1,28 @@
+<?php
+
+namespace FunctionGeneratorReturn;
+
+class Foo
+{
+
+}
+
+if (false) {
+	function doBar(bool $skipThings): iterable
+	{
+		if ($skipThings) {
+			return;
+		}
+
+		yield 1;
+	}
+
+	function doFoo(bool $skipThings): iterable
+	{
+		if ($skipThings) {
+			return;
+		}
+
+		yield from array();
+	}
+}