SIGSEGV Erro during release

[rotilho]

Hello,

First of all, thank you for the amazing work with JOCL.

I'm using JOCL to calculate PoW and I'm encountering some issues during unit tests. Everything works fine until I try to release JOCL resources, at which point I encounter the error below. While I don't need technically to release it during normal execution, I thought it was worth reporting.

Code: AttoWorkerOpenCL
Test: AttoWorkerTest

# A fatal error has been detected by the Java Runtime Environment:
#
#  SIGSEGV (0xb) at pc=0x00007f3fe6e4a22f, pid=1830426, tid=1830432
#
# JRE version: OpenJDK Runtime Environment Corretto-11.0.24.8.1 (11.0.24+8) (build 11.0.24+8-LTS)
# Java VM: OpenJDK 64-Bit Server VM Corretto-11.0.24.8.1 (11.0.24+8-LTS, mixed mode, tiered, compressed oops, g1 gc, linux-amd64)
# Problematic frame:
# C  [libOpenCL.so+0x1122f]  clReleaseKernel+0x4f
#
# Core dump will be written. Default location: Core dumps may be processed with "/usr/lib/systemd/systemd-coredump %P %u %g %s %t %c %h" (or dumping to /var/home/rotilho/IdeaProjects/commons/core.1830426)
#
# An error report file with more information is saved as:
# /var/home/rotilho/IdeaProjects/commons/hs_err_pid1830426.log
#
# If you would like to submit a bug report, please visit:
#   https://github.com/corretto/corretto-11/issues/
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#

...

Current thread (0x00007f5124028800):  JavaThread "Test worker" [_thread_in_native, id=1825925, stack(0x00007f512cf00000,0x00007f512d000000)]

Stack: [0x00007f512cf00000,0x00007f512d000000],  sp=0x00007f512cffb480,  free space=1005k
Native frames: (J=compiled Java code, A=aot compiled Java code, j=interpreted, Vv=VM code, C=native code)
C  [libOpenCL.so+0x1122f]  clReleaseKernel+0x4f
C  [libJOCL_2_0_5-linux-x86_64.so+0x1a931]  Java_org_jocl_CL_clReleaseKernelNative+0xa1
j  org.jocl.CL.clReleaseKernelNative(Lorg/jocl/cl_kernel;)I+0
j  org.jocl.CL.clReleaseKernel(Lorg/jocl/cl_kernel;)I+1
j  cash.atto.commons.AttoWorkerOpenCL.close()V+4
j  cash.atto.commons.AttoWorkerTest$Companion.afterAll()V+13
j  cash.atto.commons.AttoWorkerTest.afterAll()V+3

> Task :test FAILED

[gpu]

Sorry for the delay, and only a short 'acknowledge' for now: I'll try to allocate some time to look into this. But it does not seem to be super urgent or a super common error (and I've reduced the time that I'm spending for JOCL - it has always been a "spare time" project, and "spare time" is always limited...)