backport #920 (#921)

src/Autoload/OpenSave.gd

@@ -214,7 +214,7 @@ func save_pxo_file(
 	autosave: bool,
 	use_zstd_compression := true,
 	project: Project = Global.current_project
-) -> void:
+) -> bool:
 	if !autosave:
 		project.name = path.get_file()
 	var serialized_data := project.serialize()
@@ -224,15 +224,15 @@ func save_pxo_file(
 		)
 		Global.error_dialog.popup_centered()
 		Global.dialog_open(true)
-		return
+		return false
 	var to_save := JSON.print(serialized_data)
 	if !to_save:
 		Global.error_dialog.set_text(
 			tr("File failed to save. Converting dictionary to JSON failed.")
 		)
 		Global.error_dialog.popup_centered()
 		Global.dialog_open(true)
-		return
+		return false
 
 	# Check if a file with the same name exists. If it does, rename the new file temporarily.
 	# Needed in case of a crash, so that the old file won't be replaced with an empty one.
@@ -250,14 +250,15 @@ func save_pxo_file(
 
 	if err != OK:
 		if temp_path.is_valid_filename():
-			return
+			return false
 		Global.error_dialog.set_text(
 			tr("File failed to save. Error code %s") % str(err, ErrorManager.parse(err, " (", ")"))
 		)
 		Global.error_dialog.popup_centered()
 		Global.dialog_open(true)
-		file.close()
-		return
+		if file:  # Failsafe
+			file.close()
+		return false
 
 	if !autosave:
 		current_save_paths[Global.current_project_index] = path
@@ -308,6 +309,7 @@ func save_pxo_file(
 		)
 
 	save_project_to_recent_list(path)
+	return true
 
 
 func open_image_as_new_tab(path: String, image: Image) -> void:

src/Main.gd

@@ -287,12 +287,13 @@ func _on_SaveSprite_file_selected(path: String) -> void:
 
 func save_project(path: String) -> void:
 	var zstd: bool = Global.save_sprites_dialog.get_vbox().get_node("ZSTDCompression").pressed
-	OpenSave.save_pxo_file(path, false, zstd)
-	Global.open_sprites_dialog.current_dir = path.get_base_dir()
-	Global.config_cache.set_value("data", "current_dir", path.get_base_dir())
+	var success = OpenSave.save_pxo_file(path, false, zstd)
+	if success:
+		Global.open_sprites_dialog.current_dir = path.get_base_dir()
+		Global.config_cache.set_value("data", "current_dir", path.get_base_dir())
 
-	if is_quitting_on_save:
-		_quit()
+		if is_quitting_on_save:
+			_quit()
 
 
 func _on_SaveSpriteHTML5_confirmed() -> void: