Game Jar Crashes When Starting a New Game

[joshuaskelly]

Summary

Attempting to start a game from the jar file crashes.

Repro Steps

1. Download or build the game jar.
2. Run the jar file: java -jar DungeoneerDesktop-1.0.jar
3. Click through the splash screen and start a new game.
4. Crash.

Notes

• This issue repros in both v1.0.0 and v1.1.0.
• The editor works just fine in both edit and play modes.

Error Log

[DelverLifeCycle] READY PLAYER ONE
[DelverLevelChangeScreen] Exception: index can't be >= size: 0 >= 0
[DelverGameManager] Fatal error!
java.lang.NullPointerException
	at com.interrupt.dungeoneer.GameManager.tick(GameManager.java:113)
	at com.interrupt.dungeoneer.screens.GameScreen.render(GameScreen.java:73)
	at com.badlogic.gdx.Game.render(Game.java:46)
	at com.badlogic.gdx.backends.lwjgl.LwjglApplication.mainLoop(LwjglApplication.java:225)
	at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:126)
[DelverGameManager] Fatal error!
java.lang.NullPointerException
	at com.interrupt.dungeoneer.gfx.GlRenderer.render(GlRenderer.java:434)
	at com.interrupt.dungeoneer.GameManager.render(GameManager.java:126)
	at com.interrupt.dungeoneer.screens.GameScreen.render(GameScreen.java:88)
	at com.badlogic.gdx.Game.render(Game.java:46)
	at com.badlogic.gdx.backends.lwjgl.LwjglApplication.mainLoop(LwjglApplication.java:225)
	at com.badlogic.gdx.backends.lwjgl.LwjglApplication$1.run(LwjglApplication.java:126)
[Controllers] removed manager for application, 0 managers active
[DelverLifeCycle] Goodbye

[Interrupt]

Looks like something bad happened in level loading, the render is crashing at:

if(loadedLevel.rendererDirty)

and before that is an exception logged:

[DelverLevelChangeScreen] Exception: index can't be >= size: 0 >= 0

we should verify that assets are correctly being packaged into the jar, usually this kind of error comes out of that.

[joshuaskelly]

The game will run if ran from the Dungeoneer directory. Are we missing files needed? I thought the jar was supposed to contain all that.

[Interrupt]

The jar should get built with all of the assets included if the task is doing everything it should, although it might make sense to be building empty jars for engine releases and ship the assets folder alongside them. What do you think makes the most sense?

[joshuaskelly]

I think building a minimal jar file and shipping the assets folder is good for a number of reasons.

[Interrupt]

When building the jar, is this done using the gradlew DungeoneerDesktop:dist command? Using a regular package operation wouldn't include the assets, but the distribute task should.

[joshuaskelly]

I'll look into this. My first instinct is to make a makefile task that uses the GNU zip command. But I'd prefer a Java based solution that doesn't have external dependencies.