Linked meshes cause errors when importing exported JSON data into an existing skeleton

[misaki-eymard]

Description: If the skeleton has a linked mesh, any attempt to import the exported JSON data into an existing skeleton in the project will always result in an error.

Expected behavior: Import completes normally with no errors.

Steps to reproduce:

1. Download the attached .zip file: Linked meshes cause errors when importing exported JSON data into an existing skeleton.zip
2. Open the Spine project file in it, and export the skeleton as a JSON data file.
3. Import the exported JSON file via the Import Data dialog with the following settings:
   • Uncheck New project
   • Choose Import into an existing skeleton: and Existing attachment: Ignore
4. Then, you will see the following error: If you click the Open Log button, you will see the following error log:

   ERROR: Error importing skeleton data file: /Linked meshes cause errors when importing exported JSON data into an existing skeleton/exported-JSON-4-2-beta/Linked-meshes-test.json
   Please be sure to choose a valid skeleton JSON or binary file.
   [error] Source mesh not found for linked mesh: [linked mesh: LinkedMesh, source: Source, slot: Image]

Work around: This issue only occurs when importing into an existing skeleton, so if you import as a new skeleton, it will import correctly.

Versions of Spine where this bug was found: Spine 4.1.24 and 4.2.09-beta

This issue was reported on the following thread: https://esotericsoftware.com/forum/d/25590-%E3%83%87%E3%83%BC%E3%82%BF%E3%82%A4%E3%83%B3%E3%83%9D%E3%83%BC%E3%83%88%E3%81%A7error-error-importing-skeleton-data-file-%E3%81%8C%E7%99%BA%E7%94%9F%E3%81%99%E3%82%8B

[davidetan]

Fixed in 4.2.10-beta (5d910be2)