I've updated my Effortless Building mod today. To my surprise, the Twitch version gives a NoSuchMethodError error. The build I made and tested locally (using 'gradlew build') works fine, even in the same Twitch profile. But when I download the public version from curseforge.com it gives an error.

Mod in question

Source

 

Spoiler

[23:07:17] [main/INFO]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[23:07:17] [main/INFO]: Using primary tweak class name net.minecraftforge.fml.common.launcher.FMLTweaker
[23:07:17] [main/INFO]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLTweaker
[23:07:17] [main/INFO]: Forge Mod Loader version 14.23.4.2759 for Minecraft 1.12.2 loading
[23:07:17] [main/INFO]: Java is Java HotSpot(TM) 64-Bit Server VM, version 1.8.0_51, running on Windows 10:amd64:10.0, installed at D:\Users\Christian\Documents\Curse\Minecraft\Install\runtime\jre-x64\1.8.0_51
[23:07:17] [main/WARN]: The coremod FMLCorePlugin (net.minecraftforge.fml.relauncher.FMLCorePlugin) is not signed!
[23:07:17] [main/WARN]: The coremod FMLForgePlugin (net.minecraftforge.classloading.FMLForgePlugin) is not signed!
[23:07:17] [main/INFO]: Searching D:\Users\Christian\Documents\Curse\Minecraft\Instances\Testing Mods\mods for mods
[23:07:17] [main/INFO]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[23:07:17] [main/INFO]: Loading tweak class name net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
[23:07:17] [main/INFO]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[23:07:17] [main/INFO]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLInjectionAndSortingTweaker
[23:07:17] [main/INFO]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[23:07:18] [main/INFO]: Found valid fingerprint for Minecraft. Certificate fingerprint cd99959656f753dc28d863b46769f7f8fbaefcfc
[23:07:18] [main/ERROR]: FML appears to be missing any signature data. This is not a good thing
[23:07:18] [main/INFO]: Calling tweak class net.minecraftforge.fml.relauncher.CoreModManager$FMLPluginWrapper
[23:07:18] [main/INFO]: Calling tweak class net.minecraftforge.fml.common.launcher.FMLDeobfTweaker
[23:07:19] [main/INFO]: Loading tweak class name net.minecraftforge.fml.common.launcher.TerminalTweaker
[23:07:19] [main/INFO]: Calling tweak class net.minecraftforge.fml.common.launcher.TerminalTweaker
[23:07:19] [main/INFO]: Launching wrapped minecraft {net.minecraft.client.main.Main}
[23:07:19] [main/INFO]: Setting user: SpeedR
[23:07:21] [main/WARN]: Skipping bad option: lastServer:
[23:07:21] [main/INFO]: LWJGL Version: 2.9.4
[23:07:22] [main/INFO]: -- System Details --
Details:
    Minecraft Version: 1.12.2
    Operating System: Windows 10 (amd64) version 10.0
    Java Version: 1.8.0_51, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 279391272 bytes (266 MB) / 726663168 bytes (693 MB) up to 2856321024 bytes (2724 MB)
    JVM Flags: 4 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx3064m -Xms256m -XX:PermSize=256m
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: 
    Loaded coremods (and transformers): 
    GL info: ' Vendor: 'NVIDIA Corporation' Version: '4.6.0 NVIDIA 411.63' Renderer: 'GeForce GTX 970/PCIe/SSE2'
[23:07:22] [main/INFO]: MinecraftForge v14.23.4.2759 Initialized
[23:07:22] [main/INFO]: Starts to replace vanilla recipe ingredients with ore ingredients.
[23:07:22] [main/INFO]: Replaced 1036 ore ingredients
[23:07:22] [main/INFO]: Searching D:\Users\Christian\Documents\Curse\Minecraft\Instances\Testing Mods\mods for mods
[23:07:23] [main/INFO]: Forge Mod Loader has identified 5 mods to load
[23:07:23] [main/INFO]: Attempting connection with missing mods [minecraft, mcp, FML, forge, effortlessbuilding] at CLIENT
[23:07:23] [main/INFO]: Attempting connection with missing mods [minecraft, mcp, FML, forge, effortlessbuilding] at SERVER
[23:07:24] [main/INFO]: Reloading ResourceManager: Default, FMLFileResourcePack:Forge Mod Loader, FMLFileResourcePack:Minecraft Forge, FMLFileResourcePack:Effortless Building
[23:07:24] [main/INFO]: [net.minecraft.init.Bootstrap:func_179870_a:553]: ---- Minecraft Crash Report ----
// I let you down. Sorry :(

Time: 10/21/18 11:07 PM
Description: Initializing game

java.lang.NoSuchMethodError: nl.requios.effortlessbuilding.item.ItemRandomizerBag.setUnlocalizedName(Ljava/lang/String;)Lnet/minecraft/item/Item;
    at nl.requios.effortlessbuilding.item.ItemRandomizerBag.<init>(ItemRandomizerBag.java:43)
    at nl.requios.effortlessbuilding.EffortlessBuilding.<clinit>(EffortlessBuilding.java:47)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:348)
    at net.minecraftforge.fml.common.FMLModContainer.constructMod(FMLModContainer.java:526)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
    at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150)
    at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76)
    at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399)
    at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71)
    at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)
    at com.google.common.eventbus.EventBus.post(EventBus.java:217)
    at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:218)
    at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:196)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
    at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150)
    at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76)
    at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399)
    at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71)
    at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)
    at com.google.common.eventbus.EventBus.post(EventBus.java:217)
    at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:135)
    at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:593)
    at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:232)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:466)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:377)
    at net.minecraft.client.main.Main.main(SourceFile:123)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- Head --
Thread: Client thread
Stacktrace:
    at nl.requios.effortlessbuilding.item.ItemRandomizerBag.<init>(ItemRandomizerBag.java:43)
    at nl.requios.effortlessbuilding.EffortlessBuilding.<clinit>(EffortlessBuilding.java:47)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:348)
    at net.minecraftforge.fml.common.FMLModContainer.constructMod(FMLModContainer.java:526)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
    at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150)
    at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76)
    at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399)
    at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71)
    at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)
    at com.google.common.eventbus.EventBus.post(EventBus.java:217)
    at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:218)
    at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:196)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.google.common.eventbus.Subscriber.invokeSubscriberMethod(Subscriber.java:91)
    at com.google.common.eventbus.Subscriber$SynchronizedSubscriber.invokeSubscriberMethod(Subscriber.java:150)
    at com.google.common.eventbus.Subscriber$1.run(Subscriber.java:76)
    at com.google.common.util.concurrent.MoreExecutors$DirectExecutor.execute(MoreExecutors.java:399)
    at com.google.common.eventbus.Subscriber.dispatchEvent(Subscriber.java:71)
    at com.google.common.eventbus.Dispatcher$PerThreadQueuedDispatcher.dispatch(Dispatcher.java:116)
    at com.google.common.eventbus.EventBus.post(EventBus.java:217)
    at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:135)
    at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:593)
    at net.minecraftforge.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:232)
    at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java:466)

-- Initialization --
Details:
Stacktrace:
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:377)
    at net.minecraft.client.main.Main.main(SourceFile:123)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
    Minecraft Version: 1.12.2
    Operating System: Windows 10 (amd64) version 10.0
    Java Version: 1.8.0_51, Oracle Corporation
    Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
    Memory: 545499712 bytes (520 MB) / 904921088 bytes (863 MB) up to 2856321024 bytes (2724 MB)
    JVM Flags: 4 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx3064m -Xms256m -XX:PermSize=256m
    IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
    FML: MCP 9.42 Powered by Forge 14.23.4.2759 5 mods loaded, 5 mods active
    States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored

    | State | ID                 | Version      | Source                        | Signature |
    |:----- |:------------------ |:------------ |:----------------------------- |:--------- |
    | UC    | minecraft          | 1.12.2       | minecraft.jar                 | None      |
    | UC    | mcp                | 9.42         | minecraft.jar                 | None      |
    | UC    | FML                | 8.0.99.99    | forge-1.12.2-14.23.4.2759.jar | None      |
    | UC    | forge              | 14.23.4.2759 | forge-1.12.2-14.23.4.2759.jar | None      |
    | U     | effortlessbuilding | 0.3          | effortlessbuilding-0.3.jar    | None      |

    Loaded coremods (and transformers): 
    GL info: ' Vendor: 'NVIDIA Corporation' Version: '4.6.0 NVIDIA 411.63' Renderer: 'GeForce GTX 970/PCIe/SSE2'
    Launched Version: forge-14.23.4.2759
    LWJGL: 2.9.4
    OpenGL: GeForce GTX 970/PCIe/SSE2 GL version 4.6.0 NVIDIA 411.63, NVIDIA Corporation
    GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

    Using VBOs: Yes
    Is Modded: Definitely; Client brand changed to 'fml,forge'
    Type: Client (map_client.txt)
    Resource Packs: 
    Current Language: English (US)
    Profiler Position: N/A (disabled)
    CPU: 4x Intel(R) Core(TM) i5-4690K CPU @ 3.50GHz
[23:07:24] [main/INFO]: [net.minecraft.init.Bootstrap:func_179870_a:553]: #@!@# Game crashed! Crash report saved to: #@!@# D:\Users\Christian\Documents\Curse\Minecraft\Instances\Testing Mods\crash-reports\crash-2018-10-21_23.07.24-client.txt
 

 

I'm just very confused at this point. Any idea what is going on?

Nevermind, it is an obfuscation problem after all. Somehow my Intellij configuration has as task 'build' but it doesnt obfuscate. So I have to go into the terminal and type 'gradlew build' from there.

You can’t use your IDEs export jar functionality because Minecraft is obfuscated. As you’ve found out, you always have to use forge gradle’s build function.

I'm not using the export jar functionality, I'm using the build configuration like the runClient and runServer configuration (where you press play and debug). Its a gradle task with the name 'build' but apparently it doesn't work correctly.