Fix crash on property access to undefined property on a class with a missing dependncy

src/Psalm/Storage/ClassLikeStorage.php

@@ -501,6 +501,10 @@ public function hasAttributeIncludingParents(
         }
 
         foreach ($this->parent_classes as $parent_class) {
+            // skip missing dependencies
+            if (!$codebase->classlike_storage_provider->has($parent_class)) {
+                continue;
+            }
             $parent_class_storage = $codebase->classlike_storage_provider->get($parent_class);
             if ($parent_class_storage->hasAttribute($fq_class_name)) {
                 return true;

tests/Internal/Analyzer/Statements/Expression/Fetch/AtomicPropertyFetchAnalyzerTest.php

@@ -5,11 +5,13 @@
 namespace Psalm\Tests\Internal\Analyzer\Statements\Expression\Fetch;
 
 use Psalm\Tests\TestCase;
+use Psalm\Tests\Traits\InvalidCodeAnalysisTestTrait;
 use Psalm\Tests\Traits\ValidCodeAnalysisTestTrait;
 
 final class AtomicPropertyFetchAnalyzerTest extends TestCase
 {
     use ValidCodeAnalysisTestTrait;
+    use InvalidCodeAnalysisTestTrait;
 
     public function providerValidCodeParse(): iterable
     {
@@ -72,4 +74,21 @@ class C extends B {}
             ],
         ];
     }
+
+    public function providerInvalidCodeParse(): iterable
+    {
+        return [
+            'undefinedPropertyAccessOnMissingDependency' => [
+                'code' => <<<'PHP'
+                    <?php
+                    class A extends Missing {}
+                    function make(): A { return new A; }
+
+                    make()->prop;
+                    PHP,
+                'error_message' => 'UndefinedPropertyFetch',
+                'ignored_issues' => ['MissingDependency'],
+            ],
+        ];
+    }
 }