Fix SimpleXMLElement issue

src/Type/ObjectType.php

@@ -696,7 +696,7 @@ public function getIterableKeyType(): Type
 			}
 		}
 
-		if ($this->isInstanceOf(Traversable::class)->yes()) {
+		if ($this->isInstanceOf(Traversable::class)->yes() && !$this->isExtraOffsetAccessibleClass()->yes()) {
 			$isTraversable = true;
 			$tKey = GenericTypeVariableResolver::getType($this, Traversable::class, 'TKey');
 			if ($tKey !== null) {
@@ -732,7 +732,7 @@ public function getIterableValueType(): Type
 			}
 		}
 
-		if ($this->isInstanceOf(Traversable::class)->yes()) {
+		if ($this->isInstanceOf(Traversable::class)->yes() && !$this->isExtraOffsetAccessibleClass()->yes()) {
 			$isTraversable = true;
 			$tValue = GenericTypeVariableResolver::getType($this, Traversable::class, 'TValue');
 			if ($tValue !== null) {

tests/PHPStan/Analyser/NodeScopeResolverTest.php

@@ -821,6 +821,7 @@ public function dataFileAsserts(): iterable
 		yield from $this->gatherAssertTypes(__DIR__ . '/data/array-search-type-specifying.php');
 		yield from $this->gatherAssertTypes(__DIR__ . '/data/array-replace.php');
 		yield from $this->gatherAssertTypes(__DIR__ . '/data/bug-6889.php');
+		yield from $this->gatherAssertTypes(__DIR__ . '/data/simplexml.php');
 	}
 
 	/**

tests/PHPStan/Analyser/data/simplexml.php

@@ -0,0 +1,69 @@
+<?php
+
+namespace SimpleXMLIteratorBug;
+
+use SimpleXMLElement;
+use function PHPStan\Testing\assertType;
+
+class Foo
+{
+
+	public function getAddressByGps()
+	{
+		/** @var SimpleXMLElement|null $data */
+		$data = doFoo();
+
+		if ($data === null) {
+			return;
+		}
+
+		assertType('(SimpleXMLElement|null)', $data->item);
+		foreach ($data->item as $item) {
+			assertType('SimpleXMLElement', $item);
+			assertType('SimpleXMLElement|null', $item['name']);
+		}
+	}
+
+}
+
+class Bar extends SimpleXMLElement
+{
+
+	public function getAddressByGps()
+	{
+		/** @var self|null $data */
+		$data = doFoo();
+
+		if ($data === null) {
+			return;
+		}
+
+		assertType('(SimpleXMLIteratorBug\Bar|null)', $data->item);
+		foreach ($data->item as $item) {
+			assertType(self::class, $item);
+			assertType('SimpleXMLIteratorBug\Bar|null', $item['name']);
+		}
+	}
+
+}
+
+class Baz
+{
+
+	public function getAddressByGps()
+	{
+		/** @var Bar|null $data */
+		$data = doFoo();
+
+		if ($data === null) {
+			return;
+		}
+
+		assertType('(SimpleXMLIteratorBug\Bar|null)', $data->item);
+		foreach ($data->item as $item) {
+			assertType(Bar::class, $item);
+			assertType('SimpleXMLIteratorBug\Bar|null', $item['name']);
+		}
+	}
+
+}