Fix result cache bug with imported type aliases

Author: ondrejmirtes

src/Dependency/DependencyResolver.php

@@ -14,6 +14,7 @@
 use PHPStan\File\FileHelper;
 use PHPStan\Node\ClassPropertyNode;
 use PHPStan\Node\InClassMethodNode;
+use PHPStan\Node\InClassNode;
 use PHPStan\Node\InFunctionNode;
 use PHPStan\Reflection\ClassReflection;
 use PHPStan\Reflection\FunctionReflection;
@@ -44,6 +45,22 @@ public function resolveDependencies(Node $node, Scope $scope): NodeDependencies
 {
 $dependenciesReflections = [];
 
+if ($node instanceof InClassNode) {
+$docComment = $node->getDocComment();
+if ($docComment !== null) {
+$phpDoc = $this->fileTypeMapper->getResolvedPhpDoc(
+$scope->getFile(),
+$scope->isInClass() ? $scope->getClassReflection()->getName() : null,
+$scope->isInTrait() ? $scope->getTraitReflection()->getName() : null,
+null,
+$docComment->getText(),
+);
+foreach ($phpDoc->getTypeAliasImportTags() as $importTag) {
+$this->addClassToDependencies($importTag->getImportedFrom(), $dependenciesReflections);
+}
+}
+}
+
 if ($node instanceof Node\Stmt\Class_) {
 if ($node->namespacedName !== null) {
 $this->addClassToDependencies($node->namespacedName->toString(), $dependenciesReflections);