Profiling gives "Redefinition failed with error 62"

[DarkShadow44]

Describe the bug
When using the VisualVM CPU profiler on Minecraft, I get various messages like

Error
Redefinition failed with error 62
Check JVMTI documentation for this error code.

To Reproduce
Steps to reproduce the behavior:
Start Minecraft
Attach VisualVM
Start CPU Profiler on some Minecraft classes

Expected behavior
No error.
Or, ssince the error doesn't seem to have big effects, an option to just ignore it. The constant popups are extremly annoying though.

VisualVM log

visualvm.log

Desktop (please complete the following information):
Arch Linux
JVM: OpenJDK 64-Bit Server VM (21.0.8+9-b1038.68, mixed mode, sharing)
Java: version 21.0.8 2025-07-15, vendor JetBrains s.r.o.
Java Home: /home/fabian/.gradle/jdks/jetbrains_s_r_o_-21-amd64-linux.2

[thurka]

Thanks for the report. However, to be able to diagnose it, I need a way to reproduce it. Can you please provide the exact steps how to reproduce it?

[DarkShadow44]

It can be reproduced with the 1.7.10 ExampleMod

Just clone the repo and run ./gradlew runClient21, assuming java in your path is Java 21.
Once Minecraft runs and the main menu is visible, click "Singleplayer". Then attach VisualVM to GradleStart and start the profiler on the classes net.minecraft.client.**

This should give the error a few times.

[thurka]

Thanks for the steps. I am able to reproduce the error 62.

[thurka]

Some of the classes, which cause this bug:

class com.llamalad7.mixinextras.sugar.impl.SingleIterationList
class org.spongepowered.asm.mixin.injection.code.MethodSlice$InsnListSlice$SliceIterator
class org.spongepowered.include.com.google.common.collect.HashBiMap
class org.spongepowered.include.com.google.common.collect.ImmutableList

[thurka]

Method causing problem with strange StackMapTable ( chop frame ):

  public boolean containsKey(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=3, locals=2, args_size=2
         0: aload_0
         1: aload_1
         2: aload_1
         3: invokestatic  #157                // Method org/spongepowered/include/com/google/common/collect/Hashing.smearedHash:(Ljava/lang/Object;)I
         6: invokespecial #159                // Method seekByKey:(Ljava/lang/Object;I)Lorg/spongepowered/include/com/google/common/collect/HashBiMap$BiEntry;
         9: ifnull        16
        12: iconst_1
        13: goto          17
        16: iconst_0
        17: ireturn
      LineNumberTable:
        line 245: 0
      StackMapTable: number_of_entries = 2
        frame_type = 249 /* chop */
          offset_delta = 16
        frame_type = 64 /* same_locals_1_stack_item */
          stack = [ int ]
      LocalVariableTable:
        Start  Length  Slot  Name   Signature
            0      18     0  this   Lorg/spongepowered/include/com/google/common/collect/HashBiMap;
            0      18     1   key   Ljava/lang/Object;
      LocalVariableTypeTable:
        Start  Length  Slot  Name   Signature
            0      18     0  this   Lorg/spongepowered/include/com/google/common/collect/HashBiMap<TK;TV;>;
    RuntimeVisibleParameterAnnotations:
      parameter 0:
        0: #131()
          javax.annotation.Nullable

[thurka]

Instrumented code:

  public boolean containsKey(java.lang.Object);
    descriptor: (Ljava/lang/Object;)Z
    flags: (0x0001) ACC_PUBLIC
    Code:
      stack=6, locals=2, args_size=2
         0: sipush        3140
         3: invokestatic  #331                // Method org/graalvm/visualvm/lib/jfluid/server/ProfilerRuntimeCPUFullInstr.methodEntry:(C)V
         6: nop
         7: nop
         8: aload_0
         9: aload_1
        10: aload_1
        11: invokestatic  #157                // Method org/spongepowered/include/com/google/common/collect/Hashing.smearedHash:(Ljava/lang/Object;)I
        14: invokespecial #159                // Method seekByKey:(Ljava/lang/Object;I)Lorg/spongepowered/include/com/google/common/collect/HashBiMap$BiEntry;
        17: ifnull        24
        20: iconst_1
        21: goto          25
        24: iconst_0
        25: sipush        3140
        28: invokestatic  #337                // Method org/graalvm/visualvm/lib/jfluid/server/ProfilerRuntimeCPUFullInstr.methodExit:(C)V
        31: nop
        32: nop
        33: ireturn
        34: astore_1
        35: sipush        3140
        38: invokestatic  #337                // Method org/graalvm/visualvm/lib/jfluid/server/ProfilerRuntimeCPUFullInstr.methodExit:(C)V
        41: aload_1
        42: athrow
      Exception table:
         from    to  target type
             0    34    34   any
      LineNumberTable:
        line 245: 0
      StackMapTable: number_of_entries = 3
        frame_type = 249 /* chop */
          offset_delta = 24
        frame_type = 64 /* same_locals_1_stack_item */
          stack = [ int ]
        frame_type = 255 /* full_frame */
          offset_delta = 8
          locals = [ class org/spongepowered/include/com/google/common/collect/HashBiMap ]
          stack = [ class java/lang/Throwable ]
      LocalVariableTable:
        Start  Length  Slot  Name   Signature
            8      26     0  this   Lorg/spongepowered/include/com/google/common/collect/HashBiMap;
            8      26     1   key   Ljava/lang/Object;
      LocalVariableTypeTable:
        Start  Length  Slot  Name   Signature
            8      26     0  this   Lorg/spongepowered/include/com/google/common/collect/HashBiMap<TK;TV;>;
    RuntimeVisibleParameterAnnotations:
      parameter 0:
        0: #131()
          javax.annotation.Nullable

Verification failure:

Bad type in org/spongepowered/include/com/google/common/collect/HashBiMap::containsKey(Object) @24 (org/spongepowered/include/com/google/common/collect/HashBiMap is not assignable from bogus_type)
  while assigning frame @24 with locals [bogus_type, bogus_type] and stack [java/lang/Throwable]
  to frame @34 with locals [org/spongepowered/include/com/google/common/collect/HashBiMap, null] and stack [java/lang/Throwable, null]