```
2 # A fatal error has been detected by the Java Runtime Environment:
  3 #
  4 # Internal Error (/shared/projects/openjdk/jdk-jdk/source/src/hotspot/share/runtime/thread.hpp:677), pid=142925, tid=142926
  5 # assert(current != nullptr) failed: Thread::current() called on detached thread
  6 #
  7 # JRE version: (23.0) (fastdebug build )
  8 # Java VM: OpenJDK 64-Bit Server VM (fastdebug 23-internal-adhoc.thomas.source, interpreted mode, compressed class ptrs, g1 gc, linux-amd64)
  9 # Problematic frame:
 10 # V [libjvm.so+0x1331371] Mutex::lock_without_safepoint_check()+0x71
 11 #
 12 # CreateCoredumpOnCrash turned off, no core file dumped
 13 #
 14 #
 15
 16 --------------- S U M M A R Y ------------
 17
 18 Command Line: -XX:-CreateCoredumpOnCrash -Xint -Xlog:cds=debug -Xlog:cds+map*=trace:file=SharedArchiveFile0.map:none:filesize=0 -Xshare:dump -Xlog:cds,cds+hashtables -XX:SharedArchiveFile=SharedArchiveFile1.jsa -Xmx128M -XX:-UseCompressedOops -X log:os+rand=debug -XX:+UseNewCode
 19
 20 Host: starfish, AMD Ryzen 9 3900X 12-Core Processor, 24 cores, 62G, Ubuntu 20.04.6 LTS
 21 Time: Wed Apr 10 14:37:44 2024 CEST elapsed time: 0.022355 seconds (0d 0h 0m 0s)
 22
 23 --------------- T H R E A D ---------------
 24
 25 Current thread is native thread
 26
 27 Stack: [0x00007fa7b6356000,0x00007fa7b6457000], sp=0x00007fa7b64555f0, free space=1021k
 28 Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
 29 V [libjvm.so+0x1331371] Mutex::lock_without_safepoint_check()+0x71 (thread.hpp:677)
 30 V [libjvm.so+0xa2c299] Decoder::decode(unsigned char*, char*, int, int*, char const*, bool)+0x99 (decoder.cpp:90)
 31 V [libjvm.so+0x13c328a] os::dll_address_to_function_name(unsigned char*, char*, int, int*, bool)+0xda (os_linux.cpp:1561)
 32 V [libjvm.so+0x133904b] NativeCallStack::print_on(outputStream*, int) const [clone .part.2]+0x9b (nativeCallStack.cpp:96)
 33 V [libjvm.so+0x13bcdfb] os::random()+0xdb (os.cpp:828)
 34 V [libjvm.so+0x17d8329] Thread::Thread()+0x2c9 (thread.cpp:106)
 35 V [libjvm.so+0xe101f3] JavaThread::JavaThread()+0x13 (javaThread.cpp:507)
 36 V [libjvm.so+0x17f04a7] Threads::create_vm(JavaVMInitArgs*, bool*)+0x1f7 (threads.cpp:527)
 37 V [libjvm.so+0xf063e9] JNI_CreateJavaVM+0x59 (jni.cpp:3581)
 38 C [libjli.so+0x49be] JavaMain+0x8e (java.c:1550)
 39 C [libjli.so+0x821d] ThreadJavaMain+0xd (java_md.c:650)
```

Can happen under rare circumstances (e.g. manually printing call stacks outside of error reporting on early threads or on threads that have not been attached to the JVM).

The solution should be to only decode if the we are running on a VM-attached thread.