[01May2021 18:31:12.255] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher running: args [--username, Pineappleguy03, --version, 1.16.5-forge-36.1.13, --gameDir, C:\games.minecraft, --assetsDir, C:\games.minecraft\assets, --assetIndex, 1.16, --uuid, ec6c9d897ef74f078d21233bdce5e774, --accessToken, ????????, --userType, mojang, --versionType, release, --launchTarget, fmlclient, --fml.forgeVersion, 36.1.13, --fml.mcVersion, 1.16.5, --fml.forgeGroup, net.minecraftforge, --fml.mcpVersion, 20210115.111550]
[01May2021 18:31:12.259] [main/INFO] [cpw.mods.modlauncher.Launcher/MODLAUNCHER]: ModLauncher 8.0.9+86+master.3cf110c starting: java version 1.8.0_51 by Oracle Corporation
[01May2021 18:31:12.279] [main/WARN] [cpw.mods.modlauncher.SecureJarHandler/]: LEGACY JDK DETECTED, SECURED JAR HANDLING DISABLED
[01May2021 18:31:12.443] [main/INFO] [optifine.OptiFineTransformationService/]: OptiFineTransformationService.onLoad
[01May2021 18:31:12.445] [main/INFO] [optifine.OptiFineTransformationService/]: OptiFine ZIP file: C:\games.minecraft\mods\OptiFine_1.16.5_HD_U_G7.jar
[01May2021 18:31:12.447] [main/INFO] [optifine.OptiFineTransformer/]: Target.PRE_CLASS is available
[01May2021 18:31:12.552] [main/INFO] [net.minecraftforge.fml.loading.FixSSL/CORE]: Added Lets Encrypt root certificates as additional trust
[01May2021 18:31:12.599] [main/INFO] [mixin/]: SpongePowered MIXIN Subsystem Version=0.8.2 Source=file:/C:/games/.minecraft/libraries/org/spongepowered/mixin/0.8.2/mixin-0.8.2.jar Service=ModLauncher Env=CLIENT
[01May2021 18:31:12.608] [main/INFO] [optifine.OptiFineTransformationService/]: OptiFineTransformationService.initialize
[01May2021 18:31:14.833] [main/INFO] [STDERR/]: [org.antlr.v4.runtime.ConsoleErrorListener:syntaxError:38]: line 1:0 token recognition error at: '~'
[01May2021 18:31:14.873] [main/INFO] [optifine.OptiFineTransformationService/]: OptiFineTransformationService.transformers
[01May2021 18:31:14.922] [main/INFO] [optifine.OptiFineTransformer/]: Targets: 308
[01May2021 18:31:15.558] [main/INFO] [optifine.OptiFineTransformationService/]: additionalClassesLocator: [optifine., net.optifine.]
[01May2021 18:31:15.736] [main/INFO] [cpw.mods.modlauncher.LaunchServiceHandler/MODLAUNCHER]: Launching target 'fmlclient' with arguments [--version, 1.16.5-forge-36.1.13, --gameDir, C:\games.minecraft, --assetsDir, C:\games.minecraft\assets, --uuid, ec6c9d897ef74f078d21233bdce5e774, --username, Pineappleguy03, --assetIndex, 1.16, --accessToken, ????????, --userType, mojang, --versionType, release]
[01May2021 18:31:20.749] [main/WARN] [mixin/]: @ModifyConstant conflict. Skipping dungeons_gear.mixins.json:PlayerEntityMixin->@ModifyConstant::getAttackReachSquared(D)D with priority 1000, already redirected by pehkui.mixins.json:reach.PlayerEntityMixin->@ModifyConstant::attackModifyDistance(D)D with priority 1000
[01May2021 18:31:20.751] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
[01May2021 18:31:20.752] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:39)
[01May2021 18:31:20.752] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:54)
[01May2021 18:31:20.752] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.LaunchServiceHandler.launch(LaunchServiceHandler.java:72)
[01May2021 18:31:20.752] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.Launcher.run(Launcher.java:82)
[01May2021 18:31:20.752] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1052]: at cpw.mods.modlauncher.Launcher.main(Launcher.java:66)
[01May2021 18:31:20.752] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: Caused by: java.lang.reflect.InvocationTargetException
[01May2021 18:31:20.753] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[01May2021 18:31:20.753] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
[01May2021 18:31:20.753] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
[01May2021 18:31:20.753] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at java.lang.reflect.Method.invoke(Method.java:497)
[01May2021 18:31:20.753] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at net.minecraftforge.fml.loading.FMLClientLaunchProvider.lambda$launchService$0(FMLClientLaunchProvider.java:51)
[01May2021 18:31:20.754] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at net.minecraftforge.fml.loading.FMLClientLaunchProvider$$Lambda$459/615830852.call(Unknown Source)
[01May2021 18:31:20.754] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: at cpw.mods.modlauncher.LaunchServiceHandlerDecorator.launch(LaunchServiceHandlerDecorator.java:37)
[01May2021 18:31:20.754] [main/INFO] [STDERR/]: [java.lang.ThreadGroup:uncaughtException:1061]: ... 4 more
[01May2021 18:31:20.754] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: Caused by: org.spongepowered.asm.mixin.transformer.throwables.MixinTransformerError: An unexpected critical error was encountered
[01May2021 18:31:20.754] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:363)
[01May2021 18:31:20.755] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at org.spongepowered.asm.mixin.transformer.MixinTransformer.transformClass(MixinTransformer.java:223)
[01May2021 18:31:20.755] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at org.spongepowered.asm.mixin.transformer.MixinTransformationHandler.processClass(MixinTransformationHandler.java:121)
[01May2021 18:31:20.755] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at org.spongepowered.asm.launch.MixinLaunchPlugin.processClass(MixinLaunchPlugin.java:131)
[01May2021 18:31:20.755] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at cpw.mods.modlauncher.serviceapi.ILaunchPluginService.processClassWithFlags(ILaunchPluginService.java:154)
[01May2021 18:31:20.755] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at cpw.mods.modlauncher.LaunchPluginHandler.offerClassNodeToPlugins(LaunchPluginHandler.java:85)
[01May2021 18:31:20.755] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at cpw.mods.modlauncher.ClassTransformer.transform(ClassTransformer.java:120)
[01May2021 18:31:20.755] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at cpw.mods.modlauncher.TransformingClassLoader$DelegatedClassLoader.findClass(TransformingClassLoader.java:265)
[01May2021 18:31:20.756] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:136)
[01May2021 18:31:20.756] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:98)
[01May2021 18:31:20.756] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
[01May2021 18:31:20.756] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at java.lang.ClassLoader.defineClass1(Native Method)
[01May2021 18:31:20.756] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
[01May2021 18:31:20.756] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:138)
[01May2021 18:31:20.756] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at cpw.mods.modlauncher.TransformingClassLoader.loadClass(TransformingClassLoader.java:98)
[01May2021 18:31:20.756] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
[01May2021 18:31:20.757] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at net.optifine.reflect.Reflector.(Reflector.java:267)
[01May2021 18:31:20.757] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at net.minecraft.crash.CrashReport.func_71504_g(CrashReport.java:101)
[01May2021 18:31:20.757] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at net.minecraft.crash.CrashReport.(CrashReport.java:54)
[01May2021 18:31:20.757] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at net.minecraft.crash.CrashReport.func_230188_h_(CrashReport.java:425)
[01May2021 18:31:20.757] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: at net.minecraft.client.main.Main.main(Main.java:122)
[01May2021 18:31:20.757] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:643]: ... 11 more
[01May2021 18:31:20.757] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:667]: Caused by: org.spongepowered.asm.mixin.injection.throwables.InjectionError: Critical injection failure: Constant modifier method getAttackReachSquared(D)D in dungeons_gear.mixins.json:PlayerEntityMixin failed injection check, (0/1) succeeded. Scanned 1 target(s). Using refmap dungeons_gear.refmap.json
[01May2021 18:31:20.758] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:667]: at org.spongepowered.asm.mixin.injection.struct.InjectionInfo.postInject(InjectionInfo.java:408)
[01May2021 18:31:20.758] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:667]: at org.spongepowered.asm.mixin.transformer.MixinTargetContext.applyInjections(MixinTargetContext.java:1291)
[01May2021 18:31:20.758] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:667]: at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.applyInjections(MixinApplicatorStandard.java:1042)
[01May2021 18:31:20.758] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:667]: at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.applyMixin(MixinApplicatorStandard.java:395)
[01May2021 18:31:20.758] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:667]: at org.spongepowered.asm.mixin.transformer.MixinApplicatorStandard.apply(MixinApplicatorStandard.java:320)
[01May2021 18:31:20.758] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:667]: at org.spongepowered.asm.mixin.transformer.TargetClassContext.applyMixins(TargetClassContext.java:345)
[01May2021 18:31:20.758] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:667]: at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:569)
[01May2021 18:31:20.759] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:667]: at org.spongepowered.asm.mixin.transformer.MixinProcessor.applyMixins(MixinProcessor.java:351)
[01May2021 18:31:20.759] [main/INFO] [STDERR/]: [java.lang.Throwable:printStackTrace:667]: ... 31 more

Yes, I've noticed this as well. It is a mixin incompatibility. I'm using Forge v36.1.9, Pehkui v2.0.0, & Dungeons Gear v3.0.6.

I've reported it to Virtuoel/Pehkui#91 as well.

Crash Report

this should be fixed in the latest version.

Nope, didn't work.

fixed for real this time.

Likely won't be fixed anytime soon, we are both effectively coremodding vanilla's hardcoded attack reach of 3 blocks to a modifiable attribute. Best case scenario, Forge adds a standardized attack reach attribute that makes everyone mixing into the same spot to do the same thing avoidable

Thanks!