[native-image] "Static field or an object referenced from a static field changed during native image generation" (involving java.lang.ref.SoftReference@)

[xhiroga]

Describe the issue
Trying to generate a native image from a jar file. An external library I use may cause the problem but I cannot figure out what is wrong.

The error may be related to this line.
https://github.com/hiroga-cc/excel/blob/e797739c0ebb9d61ba0327c0735ea78cba3c7fb5/src/main/kotlin/cc/hiroga/excel/Commands.kt#L21

This is the stacktrace

native-image --report-unsupported-elements-at-runtime -jar build/libs/excel-1.0-SNAPSHOT-all.jar excel --no-server
[excel:60258]    classlist:  21,088.55 ms,  2.31 GB
[excel:60258]        (cap):   3,838.12 ms,  2.31 GB
[excel:60258]        setup:   9,984.70 ms,  2.31 GB
[excel:60258]   (typeflow): 122,211.32 ms,  2.80 GB
[excel:60258]    (objects):  17,201.16 ms,  2.80 GB
[excel:60258]   (features):     952.64 ms,  2.80 GB
[excel:60258]     analysis: 141,092.80 ms,  2.80 GB
[excel:60258]     (clinit):   1,013.39 ms,  2.80 GB
[excel:60258]     universe:   2,396.48 ms,  2.80 GB
[excel:60258]      (parse):  91,949.93 ms,  3.14 GB
[excel:60258]     (inline):   4,115.45 ms,  3.20 GB
[excel:60258]    (compile):  40,709.89 ms,  3.61 GB
[excel:60258]      compile: 138,845.04 ms,  3.61 GB
[excel:60258]        image:   2,638.55 ms,  3.61 GB
Fatal error: com.oracle.svm.core.util.VMError$HostedError: com.oracle.svm.core.util.UserError$UserException: Static field or an object referenced from a static field changed during native image generation?
  object:java.lang.ref.SoftReference@7fe86eab  of class: java.lang.ref.SoftReference
  reachable through:
    object: [Ljava.lang.ref.SoftReference;@78f96a49  of class: java.lang.ref.SoftReference[]
    object: Form(Object,Object,int,Object)void  of class: java.lang.invoke.MethodTypeForm
    object: (MethodHandle,Object,int,Object)void  of class: java.lang.invoke.MethodType
    object: MethodHandle(MethodHandle,Object,int,Object)void  of class: java.lang.invoke.DirectMethodHandle
    object: MethodHandle.invokeBasic  of class: java.lang.invoke.LambdaForm$NamedFunction
    object: t5:V  of class: java.lang.invoke.LambdaForm$Name
    object: [Ljava.lang.invoke.LambdaForm$Name;@1a88b58c  of class: java.lang.invoke.LambdaForm$Name[]
    object: MH.delegate=Lambda(a0:L/DelegatingMethodHandle,a1:L,a2:I,a3:L)=>{
    t4:L=DelegatingMethodHandle.getTarget(a0:L);
    t5:V=MethodHandle.invokeBasic(t4:L,a1:L,a2:I,a3:L);void}  of class: java.lang.invoke.LambdaForm
    object: java.lang.ref.SoftReference@280df4a6  of class: java.lang.ref.SoftReference
    object: [Ljava.lang.ref.SoftReference;@3ee645b9  of class: java.lang.ref.SoftReference[]
    object: Form(Object,int,Object)void  of class: java.lang.invoke.MethodTypeForm
    object: (Object[],int,Object)void  of class: java.lang.invoke.MethodType
    object: MethodHandle(Object[],int,Object)void  of class: java.lang.invoke.DirectMethodHandle
    object: MethodHandle(Object[],int,Object)void  of class: java.lang.invoke.MethodHandleImpl$IntrinsicMethodHandle
    root: java.lang.invoke.MethodHandleImpl.makeArrayElementAccessor(Class, boolean)

        at com.oracle.svm.core.util.VMError.shouldNotReachHere(VMError.java:70)
        at com.oracle.svm.hosted.NativeImageGenerator.doRun(NativeImageGenerator.java:641)
        at com.oracle.svm.hosted.NativeImageGenerator.lambda$run$0(NativeImageGenerator.java:445)
        at java.util.concurrent.ForkJoinTask$AdaptedRunnableAction.exec(ForkJoinTask.java:1386)
        at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
        at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
        at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
        at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)
Caused by: com.oracle.svm.core.util.UserError$UserException: Static field or an object referenced from a static field changed during native image generation?
  object:java.lang.ref.SoftReference@7fe86eab  of class: java.lang.ref.SoftReference
  reachable through:
    object: [Ljava.lang.ref.SoftReference;@78f96a49  of class: java.lang.ref.SoftReference[]
    object: Form(Object,Object,int,Object)void  of class: java.lang.invoke.MethodTypeForm
    object: (MethodHandle,Object,int,Object)void  of class: java.lang.invoke.MethodType
    object: MethodHandle(MethodHandle,Object,int,Object)void  of class: java.lang.invoke.DirectMethodHandle
    object: MethodHandle.invokeBasic  of class: java.lang.invoke.LambdaForm$NamedFunction
    object: t5:V  of class: java.lang.invoke.LambdaForm$Name
    object: [Ljava.lang.invoke.LambdaForm$Name;@1a88b58c  of class: java.lang.invoke.LambdaForm$Name[]
    object: MH.delegate=Lambda(a0:L/DelegatingMethodHandle,a1:L,a2:I,a3:L)=>{
    t4:L=DelegatingMethodHandle.getTarget(a0:L);
    t5:V=MethodHandle.invokeBasic(t4:L,a1:L,a2:I,a3:L);void}  of class: java.lang.invoke.LambdaForm
    object: java.lang.ref.SoftReference@280df4a6  of class: java.lang.ref.SoftReference
    object: [Ljava.lang.ref.SoftReference;@3ee645b9  of class: java.lang.ref.SoftReference[]
    object: Form(Object,int,Object)void  of class: java.lang.invoke.MethodTypeForm
    object: (Object[],int,Object)void  of class: java.lang.invoke.MethodType
    object: MethodHandle(Object[],int,Object)void  of class: java.lang.invoke.DirectMethodHandle
    object: MethodHandle(Object[],int,Object)void  of class: java.lang.invoke.MethodHandleImpl$IntrinsicMethodHandle
    root: java.lang.invoke.MethodHandleImpl.makeArrayElementAccessor(Class, boolean)

        at com.oracle.svm.core.util.UserError.abort(UserError.java:68)
        at com.oracle.svm.hosted.image.NativeImageHeapWriter.verifyTargetDidNotChange(NativeImageHeapWriter.java:129)
        at com.oracle.svm.hosted.image.NativeImageHeapWriter.writeReference(NativeImageHeapWriter.java:157)
        at com.oracle.svm.hosted.image.NativeImageHeapWriter.write(NativeImageHeapWriter.java:146)
        at com.oracle.svm.hosted.image.NativeImageHeapWriter.writeConstant(NativeImageHeapWriter.java:183)
        at com.oracle.svm.hosted.image.NativeImageHeapWriter.writeObject(NativeImageHeapWriter.java:375)
        at com.oracle.svm.hosted.image.NativeImageHeapWriter.writeHeap(NativeImageHeapWriter.java:88)
        at com.oracle.svm.hosted.image.NativeBootImage.build(NativeBootImage.java:472)
        at com.oracle.svm.hosted.NativeImageGenerator.doRun(NativeImageGenerator.java:630)
        ... 6 more
Error: Image build request failed with exit status 1
make: *** [excel] Error 1

Steps to reproduce the issue
Please run below steps.

1. git clone https://github.com/hiroga-cc/excel
2. make

Describe GraalVM and your environment:

• GraalVM version: graalvm-ce-java8
• JDK major version: openjdk version "1.8.0_222"
• OS: macOS 10.15.3

[christianwimmer]

#2407 fixes the problem during image heap writing. That still does not mean that the MethodHandle usage in that application is going to work.