Try to reduce side effects.

Core/GDCore/IDE/Project/ProjectResourcesCopier.cpp

@@ -26,20 +26,20 @@ bool ProjectResourcesCopier::CopyAllResourcesTo(
     bool preserveAbsoluteFilenames,
     bool preserveDirectoryStructure) {
 
+  // Check if there are some resources with absolute filenames
+  gd::ResourcesAbsolutePathChecker absolutePathChecker(originalProject.GetResourcesManager(), fs);
+  gd::ResourceExposer::ExposeWholeProjectResources(originalProject, absolutePathChecker);
+
+  auto projectDirectory = fs.DirNameFrom(originalProject.GetProjectFile());
+  std::cout << "Copying all resources from " << projectDirectory << " to "
+            << destinationDirectory << "..." << std::endl;
+
   gd::Project& project = originalProject;
   if (!updateOriginalProject) {
     std::shared_ptr<gd::Project> clonedProject(new gd::Project(originalProject));
     project = *clonedProject;
   }
 
-  // Check if there are some resources with absolute filenames
-  gd::ResourcesAbsolutePathChecker absolutePathChecker(project.GetResourcesManager(), fs);
-  gd::ResourceExposer::ExposeWholeProjectResources(project, absolutePathChecker);
-
-  auto projectDirectory = fs.DirNameFrom(project.GetProjectFile());
-  std::cout << "Copying all resources from " << projectDirectory << " to "
-            << destinationDirectory << "..." << std::endl;
-
   // Get the resources to be copied
   gd::ResourcesMergingHelper resourcesMergingHelper(project.GetResourcesManager(), fs);
   resourcesMergingHelper.SetBaseDirectory(projectDirectory);