Search the Forums BEFORE making a new post.

[SOLVED] [1.7.2] byte array seems to be null when mod run as packed jar

Posted April 26, 201411 yr

I solved it by adding @SortingOrder(1001) above my FMLLoadingPlugin (thank you diesieben07)

So I've got a strange problem with my current coremod, which I try to update to 1.7.2.

I use several ASM transformers and they seem to run fine and do the correct changes (I wrote the classes as files and opened them with JD-GUI, every patch is correctly applied)

However when I pack / build my coremod, put it into the mods folder and try to start Minecraft, I get a NullPointerException. The byte array supplied by the transform method is null (I put a println with the byte array and it printed null)

Here some details:

Forge version used: 10.12.1.1061

Crash report: https://gist.github.com/SanAndreasP/a18ef19f6f5efce65464

whole log file: (seems to be cut off and doesn't show the error, idk why) https://gist.github.com/SanAndreasP/4a6d737d043276f4b50e

offending class: https://github.com/SanAndreasP/SAPManagerPack/blob/master/java/de/sanandrew/core/manpack/transformer/TransformPlayerDismountCtrl.java#L23

whole source: https://github.com/SanAndreasP/SAPManagerPack/tree/master/java/de/sanandrew/core/manpack

Don't ask for support per PM! They'll get ignored! | If a post helped you, click the "Thank You" button at the top right corner of said post! |

mah twitter

This thread makes me sad because people just post copy-paste-ready code when it's obvious that the OP has little to no programming experience. This is not how learning works.

Quote

April 27, 201411 yr

Author

If I remember correctly your transformer will be called with a null byte array if a class couldn't be found in some cases. Try and check for null and if it is null, just return null yourself. Then it will not crash with your ClassTransformer and you will get a proper stack trace as to where the CNFE is coming from.

Just an idea.

Yes, seems like my ChannelHandler caused it when I initialized it statically like static final Inst var = new Inst(params);

Now the only problem persisting is that it seems that I can't use COMPUTE_FRAMES flag for the ClassWriter when I convert the transformed class back into a byte array... And again, only in a non-dev environment, in eclipse, everything works as expected.

It just gives me an InvocationTargetException caused by a ClassNotFoundException

[12:41:19 INFO]: Client> java.lang.reflect.InvocationTargetException
[12:41:19 INFO]: Client> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_25]
[12:41:19 INFO]: Client> 	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_25]
[12:41:19 INFO]: Client> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_25]
[12:41:19 INFO]: Client> 	at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_25]
[12:41:19 INFO]: Client> 	at net.minecraft.launchwrapper.Launch.launch(Launch.java:134) [launchwrapper-1.9.jar:?]
[12:41:19 INFO]: Client> 	at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.9.jar:?]
[12:41:19 INFO]: Client> Caused by: java.lang.NoClassDefFoundError: net/minecraft/entity/projectile/EntitySnowball
[12:41:19 INFO]: Client> 	at net.minecraft.item.Item.func_150900_l(Item.java:171) ~[abn.class:?]
[12:41:19 INFO]: Client> 	at net.minecraft.init.Bootstrap.func_151354_b(SourceFile:358) ~[kb.class:?]
[12:41:19 INFO]: Client> 	at net.minecraft.client.Minecraft.<init>(Minecraft.java:266) ~[azd.class:?]
[12:41:19 INFO]: Client> 	at net.minecraft.client.main.Main.main(SourceFile:84) ~[Main.class:?]
[12:41:19 INFO]: Client> 	... 6 more
[12:41:19 INFO]: Client> Caused by: java.lang.ClassNotFoundException: net.minecraft.entity.projectile.EntitySnowball
[12:41:19 INFO]: Client> 	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:188) ~[launchwrapper-1.9.jar:?]
[12:41:19 INFO]: Client> 	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_25]
[12:41:19 INFO]: Client> 	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_25]
[12:41:19 INFO]: Client> 	at net.minecraft.item.Item.func_150900_l(Item.java:171) ~[abn.class:?]
[12:41:19 INFO]: Client> 	at net.minecraft.init.Bootstrap.func_151354_b(SourceFile:358) ~[kb.class:?]
[12:41:19 INFO]: Client> 	at net.minecraft.client.Minecraft.<init>(Minecraft.java:266) ~[azd.class:?]
[12:41:19 INFO]: Client> 	at net.minecraft.client.main.Main.main(SourceFile:84) ~[Main.class:?]
[12:41:19 INFO]: Client> 	... 6 more
[12:41:19 INFO]: Client> Caused by: java.lang.NoClassDefFoundError: net/minecraft/entity/projectile/EntityThrowable
[12:41:19 INFO]: Client> 	at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.7.0_25]
[12:41:19 INFO]: Client> 	at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.7.0_25]
[12:41:19 INFO]: Client> 	at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.7.0_25]
[12:41:19 INFO]: Client> 	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:180) ~[launchwrapper-1.9.jar:?]
[12:41:19 INFO]: Client> 	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_25]
[12:41:19 INFO]: Client> 	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_25]
[12:41:19 INFO]: Client> 	at net.minecraft.item.Item.func_150900_l(Item.java:171) ~[abn.class:?]
[12:41:19 INFO]: Client> 	at net.minecraft.init.Bootstrap.func_151354_b(SourceFile:358) ~[kb.class:?]
[12:41:19 INFO]: Client> 	at net.minecraft.client.Minecraft.<init>(Minecraft.java:266) ~[azd.class:?]
[12:41:19 INFO]: Client> 	at net.minecraft.client.main.Main.main(SourceFile:84) ~[Main.class:?]
[12:41:19 INFO]: Client> 	... 6 more
[12:41:19 INFO]: Client> Caused by: java.lang.ClassNotFoundException: net.minecraft.entity.projectile.EntityThrowable
[12:41:19 INFO]: Client> 	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:188) ~[launchwrapper-1.9.jar:?]
[12:41:19 INFO]: Client> 	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_25]
[12:41:19 INFO]: Client> 	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_25]
[12:41:19 INFO]: Client> 	at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.7.0_25]
[12:41:19 INFO]: Client> 	at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.7.0_25]
[12:41:19 INFO]: Client> 	at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.7.0_25]
[12:41:19 INFO]: Client> 	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:180) ~[launchwrapper-1.9.jar:?]
[12:41:19 INFO]: Client> 	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_25]
[12:41:19 INFO]: Client> 	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_25]
[12:41:19 INFO]: Client> 	at net.minecraft.item.Item.func_150900_l(Item.java:171) ~[abn.class:?]
[12:41:19 INFO]: Client> 	at net.minecraft.init.Bootstrap.func_151354_b(SourceFile:358) ~[kb.class:?]
[12:41:19 INFO]: Client> 	at net.minecraft.client.Minecraft.<init>(Minecraft.java:266) ~[azd.class:?]
[12:41:19 INFO]: Client> 	at net.minecraft.client.main.Main.main(SourceFile:84) ~[Main.class:?]
[12:41:19 INFO]: Client> 	... 6 more
[12:41:19 INFO]: Client> Caused by: java.lang.RuntimeException: java.lang.ClassNotFoundException: ayi
[12:41:19 INFO]: Client> 	at org.objectweb.asm.ClassWriter.getCommonSuperClass(Unknown Source) ~[asm-all-4.1.jar:4.1]
[12:41:19 INFO]: Client> 	at org.objectweb.asm.ClassWriter.a(Unknown Source) ~[asm-all-4.1.jar:4.1]
[12:41:19 INFO]: Client> 	at org.objectweb.asm.Frame.a(Unknown Source) ~[asm-all-4.1.jar:4.1]
[12:41:19 INFO]: Client> 	at org.objectweb.asm.Frame.a(Unknown Source) ~[asm-all-4.1.jar:4.1]
[12:41:19 INFO]: Client> 	at org.objectweb.asm.MethodWriter.visitMaxs(Unknown Source) ~[asm-all-4.1.jar:4.1]
[12:41:19 INFO]: Client> 	at org.objectweb.asm.tree.MethodNode.accept(Unknown Source) ~[asm-all-4.1.jar:4.1]
[12:41:19 INFO]: Client> 	at org.objectweb.asm.tree.MethodNode.accept(Unknown Source) ~[asm-all-4.1.jar:4.1]
[12:41:19 INFO]: Client> 	at org.objectweb.asm.tree.ClassNode.accept(Unknown Source) ~[asm-all-4.1.jar:4.1]
[12:41:19 INFO]: Client> 	at de.sanandrew.core.manpack.transformer.ASMHelper.createBytes(ASMHelper.java:124) ~[sAPManPack-1.7.2-2.0.0.jar:?]
[12:41:19 INFO]: Client> 	at de.sanandrew.core.manpack.transformer.TransformEntityThrowable.transformLqThrowable(TransformEntityThrowable.java:108) ~[sAPManPack-1.7.2-2.0.0.jar:?]
[12:41:19 INFO]: Client> 	at de.sanandrew.core.manpack.transformer.TransformEntityThrowable.transform(TransformEntityThrowable.java:37) ~[sAPManPack-1.7.2-2.0.0.jar:?]
[12:41:19 INFO]: Client> 	at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:276) ~[launchwrapper-1.9.jar:?]
[12:41:19 INFO]: Client> 	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:174) ~[launchwrapper-1.9.jar:?]
[12:41:19 INFO]: Client> 	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_25]
[12:41:19 INFO]: Client> 	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_25]
[12:41:19 INFO]: Client> 	at java.lang.ClassLoader.defineClass1(Native Method) ~[?:1.7.0_25]
[12:41:19 INFO]: Client> 	at java.lang.ClassLoader.defineClass(Unknown Source) ~[?:1.7.0_25]
[12:41:19 INFO]: Client> 	at java.security.SecureClassLoader.defineClass(Unknown Source) ~[?:1.7.0_25]
[12:41:19 INFO]: Client> 	at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:180) ~[launchwrapper-1.9.jar:?]
[12:41:19 INFO]: Client> 	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_25]
[12:41:19 INFO]: Client> 	at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:1.7.0_25]
[12:41:19 INFO]: Client> 	at net.minecraft.item.Item.func_150900_l(Item.java:171) ~[abn.class:?]
[12:41:19 INFO]: Client> 	at net.minecraft.init.Bootstrap.func_151354_b(SourceFile:358) ~[kb.class:?]
[12:41:19 INFO]: Client> 	at net.minecraft.client.Minecraft.<init>(Minecraft.java:266) ~[azd.class:?]
[12:41:19 INFO]: Client> 	at net.minecraft.client.main.Main.main(SourceFile:84) ~[Main.class:?]
[12:41:19 INFO]: Client> 	... 6 more

Don't ask for support per PM! They'll get ignored! | If a post helped you, click the "Thank You" button at the top right corner of said post! |

mah twitter

This thread makes me sad because people just post copy-paste-ready code when it's obvious that the OP has little to no programming experience. This is not how learning works.

Quote

April 27, 201411 yr

Author

Hrm.
COMPUTE_FRAMES
is always a dangerous spot, because it triggers class-loading of other classes.

I see you are using "notched" class-names in your transformation. Don't do that, FML transforms all the classes to have their MCP name at runtime, so if you use those you should be fine. Maybe that is the problem.

I'm only using notched class names when I search for a needle in a haystack (since the ClassNode has it's instructions only in notched code for whatever reason)

Don't ask for support per PM! They'll get ignored! | If a post helped you, click the "Thank You" button at the top right corner of said post! |

mah twitter

This thread makes me sad because people just post copy-paste-ready code when it's obvious that the OP has little to no programming experience. This is not how learning works.

Quote

April 27, 201411 yr

Author

Oh. If you do @SortingIndex(1001) (or bigger) on your IFMLLoadingPlugin your transformers run after the deobfuscation transformer.

In all honesty I am quite unsure as to where your error is originating from

width=550 height=550 http://ih0.redbubble.net/image.15030945.3699/fc,550x550,white.u1.jpg[/img]

The sorting index worked like a charm and instantly killed all my problems. Also I don't have to worry about the notched method/field/class naming crap anymore.

I can't thank you enough \o/

Don't ask for support per PM! They'll get ignored! | If a post helped you, click the "Thank You" button at the top right corner of said post! |

mah twitter

This thread makes me sad because people just post copy-paste-ready code when it's obvious that the OP has little to no programming experience. This is not how learning works.

Quote

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Unfortunately, your content contains terms that we do not allow. Please edit your content to remove the highlighted words below.

Reply to this topic...

https://forums.minecraftforge.net/topic/18422-solved-172-byte-array-seems-to-be-null-when-mod-run-as-packed-jar/

Followers

Go to topic listing

IPS spam blocked by CleanTalk.

Announcements

🎯 Elivius Needs You! Staff Wanted In All Positions! [Looking for Staff]

🌍 Elivius — Building a Legendary Minecraft Experience

Elivius is more than just a Minecraft server — it’s a vision. For years, our world has been in development, on and off, shaped by a small but passionate team. Now, we’re pushing forward with full force to create something unforgettable: a Towny-based survival experience enriched with custom quests, seasonal events, minigames, immersive builds, and unique features you won’t find anywhere else.

✨ Our Vision & Goals
Create a community-first server that feels alive, fair, and fun.
Build immersive seasonal events that keep players engaged year-round.
Develop custom content that brings personality and depth to Towny survival.
Grow Elivius into a credible, long-term project with transparency, quality, and heart.

We’ve already built the foundation, tested systems, and proven our resilience. Now, we’re looking for talented volunteers to join us and help Elivius become everything we know it can be.

⚒️ Recruiting Passionate Volunteers

Elivius is a volunteer project. While we don’t offer pay, we do provide:
🎁 Staff-exclusive giveaways (Nitro, rewards, in-game perks).
🏆 A chance to shape one of the most ambitious Towny servers.
💡 An opportunity to learn, grow, and leave your mark on something players will remember.
❤️ A welcoming, close-knit team that feels more like family.

We’re currently looking for:

🟦 Helper (Moderation Team)
Front-line moderators who answer questions, enforce rules, and keep the server safe and welcoming.

🟩 Builder
Creative builders who design spawns, event maps, and breathtaking seasonal builds.

🟨 Content Team
Configuration editors who bring features to life using plugins, resource packs, quests, menus, and systems.

🟦 Developer
Backend coders who create and maintain custom plugins, optimize performance, and bring new mechanics to life.

🟪 Media Team
Artists, editors, and designers who create graphics, trailers, animations, and promo content.

🟧 Content Creator
Streamers and YouTubers who help grow our player base. Creators get promotions and commissions on purchases through their codes.

🚀 Be Part of the Future of Elivius

We’re still small, but our ambitions are huge. With your help, we can turn Elivius into a legendary community where players feel at home and excited to return.

📌 All requirements are currently waived to help motivated applicants get started.
💬 Join our Discord and apply in the #staff-applications channel today!
👉 https://discord.gg/4HBU5tBDqc

Elivius wants YOU. Let’s build something unforgettable, together.

By AidenJules_ · Posted 3 hours ago3 hr
[1.21.3] How to add effects to food?

game changed the way you create foods.
for example minecraft 1.21.8 code for the golden apple is

Foods.java
public static final FoodProperties GOLDEN_APPLE = new FoodProperties.Builder().nutrition(4).saturationModifier(1.2F).alwaysEdible().build();

Items.java
public static final Item GOLDEN_APPLE = registerItem("golden_apple", new Item.Properties().food(Foods.GOLDEN_APPLE, Consumables.GOLDEN_APPLE));

Consumables.java
public static final Consumable GOLDEN_APPLE = defaultFood() .onConsume( new ApplyStatusEffectsConsumeEffect( List.of(new MobEffectInstance(MobEffects.REGENERATION, 100, 1), new MobEffectInstance(MobEffects.ABSORPTION, 2400, 0)) ) )

By LordCambion · 17 hours ago17 hr
Is this forum active?

hello everyone..!

By WinX · Yesterday at 06:47 AM1 day
How to add my mob to another mod's biome in 1.20.1.

tysm

By ilov3gam3z · Friday at 06:05 PM1 day
Orbital strike cannon fishing rod mod

was focused on school so didnt respond u think ur gonna get 1.21+ done by this week? @FoxyWoxy

By Astoxy · Friday at 11:09 AM1 day

rileytom06

Sign In

[SOLVED] [1.7.2] byte array seems to be null when mod run as packed jar

Featured Replies

Join the conversation

Posts

🎯 Elivius Needs You! Staff Wanted In All Positions! [Looking for Staff]

[1.21.3] How to add effects to food?

Is this forum active?

How to add my mob to another mod's biome in 1.20.1.

Orbital strike cannon fishing rod mod

Who's Online (See full list)

Important Information

Account

Navigation

Search

Configure browser push notifications

Chrome (Android)

Chrome (Desktop)

Safari (iOS 16.4+)

Safari (macOS)

Edge (Android)

Edge (Desktop)

Firefox (Android)

Firefox (Desktop)