"java.lang.NullPointerException: Unknown" caused by spinescene

Questions
#1

Hello!

I was working on a horror-themed game for a game jam. I had the game finished and went to bundle the project and unfortunately got the message “java.lang.NullPointerException: Unknown”. I struggled to hunt down the issue for about an hour and missed the deadline for the jam (no biggie).

I was able to narrow down the issue to a spinescene within the player character (and possibly elsewhere).
I checked the uploaded settings and they are correct. I’ve also used them in previous projects without encountering this error. This error was occurring on the previous version of the engine and the newest release (the one requiring the dependency for spine).

I was able to duplicate the project and have uploaded it here:
spinescene_issue_recreated.zip (8.2 MB)
Note Ignore the strange colors of the character. I’m using a material to dynamically recolor it during runtime.

Any feedback would be helpful as I am completely lost!

Thanks!

1 Like
#2

You should post this as an issue on the git as well: https://github.com/defold/extension-spine/issues

Are you sure you uploaded the correct test project / fully saved before uploading? It looks like it opens to a generic scene instead of one with a spine scene.

1 Like
#3

Yes, this is the right project. I just double checked it on my end. The spine-scene is under main->characters. The problem isn’t running the game locally, it’s doing a specific build. I get the error doing project->build HTML 5. With my other project I got the same error doing project->bundle Windows App / HTML 5 App.

This is the message I see whenever I attempt to do project->build HTML5:
spineIssue

I will create the github issue a little later tonight when I have more time.

#4

Here is the error generated

2021-10-24 15:31:04.620 134758 [JavaFX Application Thread] ERROR editor.error-reporting - {:line 110}
java.lang.NullPointerException: null
	at com.dynamo.bob.pipeline.SpineSceneUtil.loadSkin(SpineSceneUtil.java:681)
	at com.dynamo.bob.pipeline.SpineSceneUtil.loadJson(SpineSceneUtil.java:965)
	at com.dynamo.bob.pipeline.SpineSceneBuilder.build(SpineSceneBuilder.java:413)
	at com.dynamo.bob.Project.runTasks(Project.java:1322)
	at com.dynamo.bob.Project.doBuild(Project.java:1125)
	at com.dynamo.bob.Project.build(Project.java:574)
	at editor.pipeline.bob$run_commands_BANG_$fn__37409.invoke(bob.clj:140)
	at editor.pipeline.bob$run_commands_BANG_.invokeStatic(bob.clj:139)
	at editor.pipeline.bob$bob_build_BANG_.invokeStatic(bob.clj:181)
	at editor.disk$async_bob_build_BANG_$fn__38432$fn__38435$fn__38436.invoke(disk.clj:217)
	at clojure.core$binding_conveyor_fn$fn__5739.invoke(core.clj:2030)
	at clojure.lang.AFn.call(AFn.java:18)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:834)

It works for me when building for Windows however. No error. I see the green character after adding it to the main collection. But bundling does not work for Windows either.

Is it the same error as mentioned in this thread? But the same error message is no longer being surfaced. Could you test their solutions and see if it helps?

1 Like
#5

Please create a GitHub issue and include the relevant files etc

#6

I am getting this same issue, but I have no spine enabled. Bundling html5 or just building html5 is giving me the same error. It was working before I updated. Is there a way of downgrading?

#7

Yes, you can download an older release here:

#8

but I have no spine enabled. Bundling html5 or just building html5 is giving me the same error

What extensions do you use?

#9

I am using defold-hypertrails, rendercam 1.01 and druid (ui thing)

1 Like
#10

The problem was that there was no proper build error when handling empty skins in spine scenes.

A fix has been pushed in version 1.0.5 of the spine extension.
It will now generate a build error (as our extension currently cannot handle it)

/main/character/playerSpineScene.spinescene
Skin without attachments found: ‘normalSkin’

3 Likes
#11

Thank you! That ended up being the issue. I had to go in and manually copy/paste the attachments from the default skin to the new skin. I’ve used spine for projects before and have not had to do this. Did I miss an option while exporting from Spine?

#12

Yup! Looks to be the same error. I wasn’t able to fix it in the same way. I had to manually copy/paste the JSON attachments within the skin to get it working again. I’ve used spine before for projects and have not had to do this. Did I just miss an option in spine while exporting or something?

#13

It’s probably just an oversight with the old Spine runtime. The official Spine runtime is being worked on now that Spine is an external native extension so it means up to date version of Spine can be used and exporting without any gotchas should be possible.

2 Likes