Running the attached minimal Java program under an OpenJ9 fastdebug build with -Xjit:count=200,optLevel=scorching causes a JIT assertion failure during compilation of Test. The same program runs normally (prints “PASS”) with default JIT settings.

[SunParis]

Environment

• JVM: OpenJ9 fastdebug build (3afb05926272c09b5d7450134ed147bfe8841122, 17.0.18-internal+0-adhoc.syc.jdk17u-j9-master-7040b06a21)
• OS: Linux 6.18.6, x86_64
• Build GCC: 9.5
• Build type: fastdebug

Key assertion and component

- Compile level: scorching
- Options: -Xjit:count=200,optLevel=scorching -Xshareclasses:none

Steps to reproduce

1. Save the source code below as Test.java. And also download the attached
   FuzzerUtils.java file to the same directory.

2. Compile: javac Test.java.

3. Run with OpenJ9 fastdebug build:

   • Failing run:

    <jdk>/bin/java -Xjit:count=200,optLevel=scorching -Xshareclasses:none Test
   

   • Control run (works):

    <jdk>/bin/java -Xshareclasses:none Test
   

Expected result

The program should run without JIT assertions or crashes and print “PASS”.

Actual result

With -Xjit:count=200,optLevel=scorching, the JIT hits an assertion failure.

javacore.20260127.195912.477018.0002.txt

A subsequent run without the scorching JIT option prints just:

PASS

Source code

class Cls2 {
    public static final int N = 128;
    public static volatile long instanceCount = -1L;
    public static java.lang.String strFld = "three";
    public static int iArrFld[] = new int[Cls2.N];
    public java.lang.Object OArrFld[] = new java.lang.Object[14];
    public float fArrFld[][] = new float[Cls2.N][Cls2.N];
    public short sArrFld[] = new short[Cls2.N];
    static {
        FuzzerUtils.init(Cls2.iArrFld, 189);
    }
    public static long Cls2_check_sum = 0;
    public static long vMeth1_check_sum = 0;

    public static void vMeth1(double d1, float f1, int i9) {
        vMeth1_check_sum += i9;
        return;
    }

    public Cls2() {
        Cls2.instanceCount++;
        long meth_res = 0;
        float f6 = 88.926F, f7 = 0.846F;
        int i35 = 118, i36 = 151, i37 = -54162, i38 = 217,
            i39 = 203, i40 = -252, i41 = 12, i42 = -10,
            i43 = -63277, i44 = -8, i45 = 10;
        long l2 = -51841L;
        boolean b3 = true;
        double d5 = -1.85485, d6 = 31.73819;
        java.lang.String str2 = "three";
        java.lang.String str3 = "four";
        byte by3 = 8;
        byte byArr1[] = new byte[Cls2.N];
        Cls1 O16 = new Cls1();
        Cls O17 = new Cls();
        FuzzerUtils.init(byArr1, ((byte) (-80)));
        Cls2.strFld += Cls2.strFld;
        Test.fMeth();
        f6 += ((float) (Cls1.iFld));
        for (f7 = ((float) (104)); f7 > 2; f7 -= 2) {
            for (l2 = ((long) (30)); l2 > 1; l2--) {
                i37 = 1;
                do {
                    switch (((i36 >>> 1) % 1) + 4) {
                        case 4 :
                            switch (((int) ((f7 % 1) + 54))) {
                                case 54 :
                                    byArr1[i37] = ((byte) (i37));
                            }
                            O16 = new Cls1();
                            i36 -= i36;
                            break;
                    }
                } while ((++i37) < 2 );
            }
        }
        meth_res =
            java.lang.Float.floatToIntBits(f6) + java.lang.Float.floatToIntBits(f7) + i35 +
            l2 + i36 + i37 + i38 + i39 + i40 + i41 + i42 + (b3 ? 1 : 0) + 
            java.lang.Double.doubleToLongBits(d5) + str2.length() + java.lang.Double.doubleToLongBits(d6) + 
            i43 + i44 + str3.length() + i45 + by3 + FuzzerUtils.checkSum(byArr1);
        Cls2.Cls2_check_sum += meth_res;
        return;
    }

}

public class Test {
    public static final int N = 128;
    public static long instanceCount = 31938L;
    public static short sFld = 1632;
    public static java.lang.String strFld1 = "one";
    public static int iFld1 = 9774;
    public static byte byFld = 64;
    public float fFld1 = 0.52F;
    public int iFld2 = 235;
    public static double dFld = -38.64046;
    public boolean bFld = true;
    public static volatile long lFld = -4778325873336617161L;
    public static volatile int iArrFld1[] = new int[Test.N];
    public long lArrFld[] = new long[Test.N];
    public static int iArrFld2[][] = new int[Test.N][Test.N];
    public java.lang.String strArrFld[][] = new java.lang.String[Test.N][Test.N];
    static {
        FuzzerUtils.init(Test.iArrFld1, 54);
        FuzzerUtils.init(Test.iArrFld2, -233);
    }
    public static long vMeth_check_sum = 0;
    public static long fMeth_check_sum = 0;

    public static float fMeth() {
        long meth_res = 0;
        int i2 = 2;
        int i3 = -9;
        int i4 = 52538;
        int i5 = 0;
        int i31 = -50908;
        int i32 = -230;
        int i33 = 3;
        int i34 = -32974;
        int iArr[] = new int[Test.N];
        long l1 = 1461753066576792058L;
        long lArr[] = new long[Test.N];
        float f = -15.916F;
        double d4 = 0.11082;
        double dArr2[][] = new double[Test.N][Test.N];
        boolean b2 = true;
        char c1 = 44216;
        java.lang.String strArr3[][] = new java.lang.String[Test.N][Test.N];
        Cls O = new Cls();
        Cls O14 = new Cls1();
        FuzzerUtils.init(iArr, -63);
        FuzzerUtils.init(lArr, -3131504936L);
        FuzzerUtils.init(dArr2, 0.105144);
        FuzzerUtils.init(strArr3, "two");
        i2 = 100;        
        while ((i2 -= 2) > 0) {
            l1 = 1;
            while ((l1 += 3) < 31) {
                for (i3 = ((int) (4)); i3 > 1; --i3) {
                    byte by2 = 121;
                    iArr[i3] >>= ~(i4--);
                    switch ((i3 % 8) + 48) {
                        case 48 :
                            {
                                iArr = iArr = iArr = iArr = iArr;
                                Test.strFld1 = "";
                                break;
                            }
                    }
                }
            } 
        }         
        meth_res = i2 + l1 + i3 + i4 + java.lang.Float.floatToIntBits(f) + 
            i5 + i31 + i32 + java.lang.Double.doubleToLongBits(d4) + i33 + 
            (b2 ? 1 : 0) + ((int) (c1)) + i34 + FuzzerUtils.checkSum(iArr) + 
            FuzzerUtils.checkSum(lArr) + java.lang.Double.doubleToLongBits(FuzzerUtils.checkSum(dArr2)) + 
            FuzzerUtils.checkSum(strArr3) + FuzzerUtils.checkSum(O) + FuzzerUtils.checkSum(O14);
        Test.fMeth_check_sum += meth_res;
        return ((float) (meth_res));
    }
    
    public static void vMeth(double d, java.lang.String str, long l) {
        java.lang.Object OArr1[] = new java.lang.Object[68];
        FuzzerUtils.init(OArr1, new Cls2());
        Test.vMeth_check_sum += FuzzerUtils.checkSum(OArr1);
    }

    public void mainTest(java.lang.String[] strArr1) {
        Test.vMeth(81.82491, "four", 176L);
    }

    public static void main(java.lang.String[] args) {
        for (int i = 0; i < 10; i++) {
            try {
                new Test().mainTest(args);
            } catch (java.lang.Exception ex) {
                System.out.println(ex.getClass().getCanonicalName());
            }
        }
        System.out.println("PASS");
    }
}

class Cls1 extends Cls {
    public static final int N = 128;
    public static long instanceCount = -3772599714L;
    public static int iFld = 14;
    public static long iMeth_check_sum = 0;

    public static int iMeth() {
        long meth_res = 0;
        Cls1 O1 = new Cls1();
        Cls1 O11 = new Cls1();
        Cls1 O13 = new Cls1();
        Cls O2 = new Cls();
        Cls O12 = new Cls();
        Cls2.vMeth1(0.2422, -1.708F, Cls1.iFld);
        return ((int) (meth_res));
    }
}

class Cls3 {
    public static final int N = 128;
    public static long instanceCount = -16211L;
}

class Cls {
    public static final int N = 128;
    public static long instanceCount = -4L;
    public static volatile float fFld = -2.206F;
    public short sArrFld1[] = new short[Cls.N];
    public static long Cls_check_sum = 0;
    
    public Cls() {
        Cls.instanceCount++;
        long meth_res = 0;
        int i1 = -62389, i46 = 30, i47 = -5, i48 = 42, i49 = -2,
            i50 = 112, i51 = 4, i52 = 0, i53 = -20, i54 = 9,
            i55 = -36226, i56 = 9, i57 = 63, i58 = 3;
        int iArr3[] = new int[Cls.N];
        byte by4 = -125;
        float f8 = 67.501F;
        float f9 = 68.341F;
        boolean b4 = false;
        Cls3 O21 = new Cls3(), O22 = new Cls3(), 
            O23 = new Cls3(), O24 = new Cls3(), 
            O25 = new Cls3(), O26 = new Cls3(),
            O27 = new Cls3();
        FuzzerUtils.init(iArr3, -172);
        for (i1 = ((int) (94)); i1 > 2; --i1) {
            double d7 = -113.88258;
            d7 += ((double) (i46));
            for (i47 = ((int) (1)); i47 < 17; i47++) {
                i46 <<= -60449;
                i48 <<= ((int) (Cls.instanceCount));
                Test.strFld1 = "";
                Test.strFld1 += Test.strFld1;
                if (i46 != 0) {
                    return;
                }
            }
        }
        return;
    }

}

[pshipton]

@hzongaro fyi

[SunParis]

Environment

• JVM: OpenJ9 fastdebug build (3afb05926272c09b5d7450134ed147bfe8841122, 17.0.18-internal+0-adhoc.syc.jdk17u-j9-master-7040b06a21)
• OS: Linux 6.18.6, x86_64
• Build GCC: 9.5
• Build type: fastdebug

Key assertion and component

- Compile level: scorching
- Options: -Xjit:count=200,optLevel=scorching -Xshareclasses:none

Steps to reproduce

1. Save the source code below as Test.java. And also download the attached
   FuzzerUtils.java file to the same directory.

2. Compile: javac Test.java.

3. Run with OpenJ9 fastdebug build:

   • Failing run:

    <jdk>/bin/java -Xjit:count=200,optLevel=scorching -Xshareclasses:none Test
   

   • Control run (works):

    <jdk>/bin/java -Xshareclasses:none Test
   

Expected result

The program should run without JIT assertions or crashes and print “PASS”.

Actual result

With -Xjit:count=200,optLevel=scorching, the JIT hits an assertion failure.

javacore.20260127.195912.477018.0002.txt

A subsequent run without the scorching JIT option prints just:

PASS

Source code

class Cls2 {
    public static final int N = 128;
    public static volatile long instanceCount = -1L;
    public static java.lang.String strFld = "three";
    public static int iArrFld[] = new int[Cls2.N];
    public java.lang.Object OArrFld[] = new java.lang.Object[14];
    public float fArrFld[][] = new float[Cls2.N][Cls2.N];
    public short sArrFld[] = new short[Cls2.N];
    static {
        FuzzerUtils.init(Cls2.iArrFld, 189);
    }
    public static long Cls2_check_sum = 0;
    public static long vMeth1_check_sum = 0;

    public static void vMeth1(double d1, float f1, int i9) {
        vMeth1_check_sum += i9;
        return;
    }

    public Cls2() {
        Cls2.instanceCount++;
        long meth_res = 0;
        float f6 = 88.926F, f7 = 0.846F;
        int i35 = 118, i36 = 151, i37 = -54162, i38 = 217,
            i39 = 203, i40 = -252, i41 = 12, i42 = -10,
            i43 = -63277, i44 = -8, i45 = 10;
        long l2 = -51841L;
        boolean b3 = true;
        double d5 = -1.85485, d6 = 31.73819;
        java.lang.String str2 = "three";
        java.lang.String str3 = "four";
        byte by3 = 8;
        byte byArr1[] = new byte[Cls2.N];
        Cls1 O16 = new Cls1();
        Cls O17 = new Cls();
        FuzzerUtils.init(byArr1, ((byte) (-80)));
        Cls2.strFld += Cls2.strFld;
        Test.fMeth();
        f6 += ((float) (Cls1.iFld));
        for (f7 = ((float) (104)); f7 > 2; f7 -= 2) {
            for (l2 = ((long) (30)); l2 > 1; l2--) {
                i37 = 1;
                do {
                    switch (((i36 >>> 1) % 1) + 4) {
                        case 4 :
                            switch (((int) ((f7 % 1) + 54))) {
                                case 54 :
                                    byArr1[i37] = ((byte) (i37));
                            }
                            O16 = new Cls1();
                            i36 -= i36;
                            break;
                    }
                } while ((++i37) < 2 );
            }
        }
        meth_res =
            java.lang.Float.floatToIntBits(f6) + java.lang.Float.floatToIntBits(f7) + i35 +
            l2 + i36 + i37 + i38 + i39 + i40 + i41 + i42 + (b3 ? 1 : 0) + 
            java.lang.Double.doubleToLongBits(d5) + str2.length() + java.lang.Double.doubleToLongBits(d6) + 
            i43 + i44 + str3.length() + i45 + by3 + FuzzerUtils.checkSum(byArr1);
        Cls2.Cls2_check_sum += meth_res;
        return;
    }

}

public class Test {
    public static final int N = 128;
    public static long instanceCount = 31938L;
    public static short sFld = 1632;
    public static java.lang.String strFld1 = "one";
    public static int iFld1 = 9774;
    public static byte byFld = 64;
    public float fFld1 = 0.52F;
    public int iFld2 = 235;
    public static double dFld = -38.64046;
    public boolean bFld = true;
    public static volatile long lFld = -4778325873336617161L;
    public static volatile int iArrFld1[] = new int[Test.N];
    public long lArrFld[] = new long[Test.N];
    public static int iArrFld2[][] = new int[Test.N][Test.N];
    public java.lang.String strArrFld[][] = new java.lang.String[Test.N][Test.N];
    static {
        FuzzerUtils.init(Test.iArrFld1, 54);
        FuzzerUtils.init(Test.iArrFld2, -233);
    }
    public static long vMeth_check_sum = 0;
    public static long fMeth_check_sum = 0;

    public static float fMeth() {
        long meth_res = 0;
        int i2 = 2;
        int i3 = -9;
        int i4 = 52538;
        int i5 = 0;
        int i31 = -50908;
        int i32 = -230;
        int i33 = 3;
        int i34 = -32974;
        int iArr[] = new int[Test.N];
        long l1 = 1461753066576792058L;
        long lArr[] = new long[Test.N];
        float f = -15.916F;
        double d4 = 0.11082;
        double dArr2[][] = new double[Test.N][Test.N];
        boolean b2 = true;
        char c1 = 44216;
        java.lang.String strArr3[][] = new java.lang.String[Test.N][Test.N];
        Cls O = new Cls();
        Cls O14 = new Cls1();
        FuzzerUtils.init(iArr, -63);
        FuzzerUtils.init(lArr, -3131504936L);
        FuzzerUtils.init(dArr2, 0.105144);
        FuzzerUtils.init(strArr3, "two");
        i2 = 100;        
        while ((i2 -= 2) > 0) {
            l1 = 1;
            while ((l1 += 3) < 31) {
                for (i3 = ((int) (4)); i3 > 1; --i3) {
                    byte by2 = 121;
                    iArr[i3] >>= ~(i4--);
                    switch ((i3 % 8) + 48) {
                        case 48 :
                            {
                                iArr = iArr = iArr = iArr = iArr;
                                Test.strFld1 = "";
                                break;
                            }
                    }
                }
            } 
        }         
        meth_res = i2 + l1 + i3 + i4 + java.lang.Float.floatToIntBits(f) + 
            i5 + i31 + i32 + java.lang.Double.doubleToLongBits(d4) + i33 + 
            (b2 ? 1 : 0) + ((int) (c1)) + i34 + FuzzerUtils.checkSum(iArr) + 
            FuzzerUtils.checkSum(lArr) + java.lang.Double.doubleToLongBits(FuzzerUtils.checkSum(dArr2)) + 
            FuzzerUtils.checkSum(strArr3) + FuzzerUtils.checkSum(O) + FuzzerUtils.checkSum(O14);
        Test.fMeth_check_sum += meth_res;
        return ((float) (meth_res));
    }
    
    public static void vMeth(double d, java.lang.String str, long l) {
        java.lang.Object OArr1[] = new java.lang.Object[68];
        FuzzerUtils.init(OArr1, new Cls2());
        Test.vMeth_check_sum += FuzzerUtils.checkSum(OArr1);
    }

    public void mainTest(java.lang.String[] strArr1) {
        Test.vMeth(81.82491, "four", 176L);
    }

    public static void main(java.lang.String[] args) {
        for (int i = 0; i < 10; i++) {
            try {
                new Test().mainTest(args);
            } catch (java.lang.Exception ex) {
                System.out.println(ex.getClass().getCanonicalName());
            }
        }
        System.out.println("PASS");
    }
}

class Cls1 extends Cls {
    public static final int N = 128;
    public static long instanceCount = -3772599714L;
    public static int iFld = 14;
    public static long iMeth_check_sum = 0;

    public static int iMeth() {
        long meth_res = 0;
        Cls1 O1 = new Cls1();
        Cls1 O11 = new Cls1();
        Cls1 O13 = new Cls1();
        Cls O2 = new Cls();
        Cls O12 = new Cls();
        Cls2.vMeth1(0.2422, -1.708F, Cls1.iFld);
        return ((int) (meth_res));
    }
}

class Cls3 {
    public static final int N = 128;
    public static long instanceCount = -16211L;
}

class Cls {
    public static final int N = 128;
    public static long instanceCount = -4L;
    public static volatile float fFld = -2.206F;
    public short sArrFld1[] = new short[Cls.N];
    public static long Cls_check_sum = 0;
    
    public Cls() {
        Cls.instanceCount++;
        long meth_res = 0;
        int i1 = -62389, i46 = 30, i47 = -5, i48 = 42, i49 = -2,
            i50 = 112, i51 = 4, i52 = 0, i53 = -20, i54 = 9,
            i55 = -36226, i56 = 9, i57 = 63, i58 = 3;
        int iArr3[] = new int[Cls.N];
        byte by4 = -125;
        float f8 = 67.501F;
        float f9 = 68.341F;
        boolean b4 = false;
        Cls3 O21 = new Cls3(), O22 = new Cls3(), 
            O23 = new Cls3(), O24 = new Cls3(), 
            O25 = new Cls3(), O26 = new Cls3(),
            O27 = new Cls3();
        FuzzerUtils.init(iArr3, -172);
        for (i1 = ((int) (94)); i1 > 2; --i1) {
            double d7 = -113.88258;
            d7 += ((double) (i46));
            for (i47 = ((int) (1)); i47 < 17; i47++) {
                i46 <<= -60449;
                i48 <<= ((int) (Cls.instanceCount));
                Test.strFld1 = "";
                Test.strFld1 += Test.strFld1;
                if (i46 != 0) {
                    return;
                }
            }
        }
        return;
    }

}

The core file generated on my end is attached.

javacore.20260127.195912.477018.0002.txt

[SunParis]

We also get some crash messages from err output.

Unhandled exception
Type=Segmentation error vmState=0x00020011
J9Generic_Signal_Number=00000018 Signal_Number=0000000b Error_Value=00000000 Signal_Code=00000001
Handler1=00007F75470406A0 Handler2=00007F754770ECB0 InaccessibleAddress=000000000000002E Sending_Process=0000002e
RDI=0000000000000000 RSI=00007F7540106FB0 RAX=0000000000000008 RBX=0000000000000003
RCX=0000000000000003 RDX=000055CEE04A5FC0 R8=0000000000000000 R9=0000000000000000
R10=00007F75440C41B0 R11=00007F7547BB0000 R12=00000000001B6100 R13=00007F75455A1500
R14=00007F7540103D20 R15=00007F7540104810
RIP=00007F7545914DAC GS=0000 FS=0000 RSP=00007F7547975DE0
EFlags=0000000000010202 CS=0033 RBP=00007F74CA111734 ERR=0000000000000006
TRAPNO=000000000000000E OLDMASK=0000000000000000 CR2=000000000000002E
xmm0=00007f7540673604 (f: 1080505856.000000, d: 6.923913e-310)
xmm1=00000000000000ff (f: 255.000000, d: 1.259867e-321)
xmm2=00007f7540673651 (f: 1080505984.000000, d: 6.923913e-310)
xmm3=00007f7545207506 (f: 1159755008.000000, d: 6.923917e-310)
xmm4=0000000000000018 (f: 24.000000, d: 1.185758e-322)
xmm5=0000003000000020 (f: 32.000000, d: 1.018558e-312)
xmm6=00007f754520754f (f: 1159755136.000000, d: 6.923917e-310)
xmm7=0000003000000020 (f: 32.000000, d: 1.018558e-312)
xmm8=0000000000000000 (f: 0.000000, d: 0.000000e+00)
xmm9=ffff000000ffff00 (f: 16776960.000000, d: -nan)
xmm10=00ff00000000ff00 (f: 65280.000000, d: 7.063274e-304)
xmm11=9999999999999999 (f: 2576980480.000000, d: -2.353437e-185)
xmm12=2020202020202020 (f: 538976256.000000, d: 6.013470e-154)
xmm13=0000000000fe00fa (f: 16646394.000000, d: 8.224411e-317)
xmm14=0000000000000000 (f: 0.000000, d: 0.000000e+00)
xmm15=0000000000000000 (f: 0.000000, d: 0.000000e+00)
Module=/home/syc/Desktop/code/jvm/jdk17u-j9/build/fastdebug/jdk/lib/default/libj9jit29.so
Module_base_address=00007F7545400000
Target=2_90_20260122_000000 (Linux 6.18.6-arch1-1)
CPU=amd64 (10 logical CPUs) (0x7ae50a000 RAM)
----------- Stack Backtrace -----------
_ZN2J913Recompilation20invalidateMethodBodyEPvP11TR_FrontEndN23TR_JitBodyInvalidations6ReasonE+0x1c (0x00007F7545914DAC [libj9jit29.so+0x514dac])
_ZN23TR_ClassUnloadRecompile10compensateEP11TR_FrontEndbPv+0x1a (0x00007F754593122A [libj9jit29.so+0x53122a])
_ZN25TR_RuntimeAssumptionTable22notifyClassUnloadEventEP11TR_FrontEndbP19TR_OpaqueClassBlockS3_+0x123 (0x00007F75458EE863 [libj9jit29.so+0x4ee863])
jitHookClassUnload+0x189 (0x00007F75455A06A9 [libj9jit29.so+0x1a06a9])
J9HookDispatch+0x12e (0x00007F7547B7296E [libj9hookable29.so+0x196e])
_ZN21MM_ClassLoaderManager21addDyingClassesToListEP18MM_EnvironmentBaseP13J9ClassLoaderP10MM_HeapMapbP7J9ClassPm+0x1c6 (0x00007F75451F0D16 [libj9gc29.so+0x1f0d16])
_ZN21MM_ClassLoaderManager24cleanUpClassLoadersStartEP18MM_EnvironmentBaseP13J9ClassLoaderP10MM_HeapMapP19MM_ClassUnloadStats+0x14e (0x00007F75451F0F8E [libj9gc29.so+0x1f0f8e])
_ZN26MM_GlobalCollectorDelegate22unloadDeadClassLoadersEP18MM_EnvironmentBase+0xd2 (0x00007F75451A16C2 [libj9gc29.so+0x1a16c2])
_ZN26MM_GlobalCollectorDelegate18postMarkProcessingEP18MM_EnvironmentBase+0xae (0x00007F75451A188E [libj9gc29.so+0x1a188e])
_ZN19MM_ParallelGlobalGC24mainThreadGarbageCollectEP18MM_EnvironmentBaseP22MM_AllocateDescriptionbb+0x160 (0x00007F7545151200 [libj9gc29.so+0x151200])
_ZN15MM_ConcurrentGC22internalGarbageCollectEP18MM_EnvironmentBaseP17MM_MemorySubSpaceP22MM_AllocateDescription+0x1a (0x00007F75451D51EA [libj9gc29.so+0x1d51ea])
_ZN12MM_Collector14garbageCollectEP18MM_EnvironmentBaseP17MM_MemorySubSpaceP22MM_AllocateDescriptionjP28MM_ObjectAllocationInterfaceS3_P20MM_AllocationContext+0xb8 (0x00007F7545112FE8 [libj9gc29.so+0x112fe8])
_ZN29MM_MemorySubSpaceGenerational23allocationRequestFailedEP18MM_EnvironmentBaseP22MM_AllocateDescriptionN17MM_MemorySubSpace14AllocationTypeEP28MM_ObjectAllocationInterfacePS4_S8_+0x2b4 (0x00007F75451E1874 [libj9gc29.so+0x1e1874])
_ZN26MM_MemorySubSpaceSemiSpace23allocationRequestFailedEP18MM_EnvironmentBaseP22MM_AllocateDescriptionN17MM_MemorySubSpace14AllocationTypeEP28MM_ObjectAllocationInterfacePS4_S8_+0x380 (0x00007F75451E29B0 [libj9gc29.so+0x1e29b0])
_ZN24MM_MemorySubSpaceGeneric14allocateObjectEP18MM_EnvironmentBaseP22MM_AllocateDescriptionP17MM_MemorySubSpaceS5_b+0x380 (0x00007F75451C7F70 [libj9gc29.so+0x1c7f70])
_ZN25MM_TLHAllocationInterface21allocateArrayletSpineEP18MM_EnvironmentBaseP22MM_AllocateDescriptionP14MM_MemorySpaceb+0x21e (0x00007F754513B65E [libj9gc29.so+0x13b65e])
_Z21OMR_GC_AllocateObjectP12OMR_VMThreadP25MM_AllocateInitialization+0x111 (0x00007F7545141791 [libj9gc29.so+0x141791])
J9AllocateIndexableObject+0x60f (0x00007F754505254F [libj9gc29.so+0x5254f])
old_slow_jitNewArray+0xb9 (0x00007F7545E6D889 [libj9jit29.so+0xa6d889])
 (0x00007F7545E80B31 [libj9jit29.so+0xa80b31])
---------------------------------------
JVMDUMP039I Processing dump event "gpf", detail "" at 2026/01/29 11:12:48 - please wait.
JVMDUMP032I JVM requested System dump using '/home/syc/Desktop/code/jdk-bugs/core.20260129.111248.533389.0001.dmp' in response to an event
JVMPORT030W /proc/sys/kernel/core_pattern setting "|/usr/lib/systemd/systemd-coredump %P %u %g %s %t %c %h %d %F" specifies that the core dump is to be piped to an external program.  Attempting to rename either core or core.533490.  Review the manual for the external program to find where the core dump is written and ensure the program does not truncate it.

JVMPORT049I The core file created by child process with pid = 533490 was not found. Review the documentation for the /proc/sys/kernel/core_pattern program "|/usr/lib/systemd/systemd-coredump %P %u %g %s %t %c %h %d %F" to find where the core file is written and ensure that program does not truncate it.

JVMDUMP012E Error in System dump: /home/syc/Desktop/code/jdk-bugs/core.20260129.111248.533389.0001.dmp
JVMDUMP032I JVM requested Java dump using '/home/syc/Desktop/code/jdk-bugs/javacore.20260129.111248.533389.0002.txt' in response to an event
JVMDUMP010I Java dump written to /home/syc/Desktop/code/jdk-bugs/javacore.20260129.111248.533389.0002.txt
JVMDUMP032I JVM requested Snap dump using '/home/syc/Desktop/code/jdk-bugs/Snap.20260129.111248.533389.0003.trc' in response to an event
JVMDUMP010I Snap dump written to /home/syc/Desktop/code/jdk-bugs/Snap.20260129.111248.533389.0003.trc
JVMDUMP032I JVM requested JIT dump using '/home/syc/Desktop/code/jdk-bugs/jitdump.20260129.111248.533389.0004.dmp' in response to an event
JVMDUMP051I JIT dump occurred in 'main' thread 0x000000000001C700
JVMDUMP010I JIT dump written to /home/syc/Desktop/code/jdk-bugs/jitdump.20260129.111248.533389.0004.dmp
JVMDUMP056I Processed dump event "gpf", detail "" at 2026/01/29 11:12:57 (8.498 seconds).