assert(JvmtiEnvBase::environments_might_exist()) failed: to enter event controller, JVM TI environments must exist

I'm get this assert if I press Ctrl+C while running Skynet with -XX:StartFlightRecording=dumponexit=true.

```
# assert(JvmtiEnvBase::environments_might_exist()) failed: to enter event controller, JVM TI environments must exist
...
V [libjvm.dylib+0x565d88] report_vm_error(char const*, int, char const*, char const*, ...)+0x80
V [libjvm.dylib+0xb20268] JvmtiEventControllerPrivate::thread_started(JavaThread*)+0xd4
V [libjvm.dylib+0x9ccc10] JVM_VirtualThreadMountEnd+0x1c8
J 1384 java.lang.VirtualThread.notifyJvmtiMountEnd(Z)V java.base@21-internal (0 bytes)
J 1484 c2 jdk.internal.vm.Continuation.enter(Ljdk/internal/vm/Continuation;Z)V java.base@21-internal (19 bytes)
J 1234 jdk.internal.vm.Continuation.enterSpecial(Ljdk/internal/vm/Continuation;ZZ)V java.base@21-internal (0 bytes)
J 1523 c2 jdk.internal.vm.Continuation.run()V java.base@21-internal (586 bytes)
J 1476 c2 java.util.concurrent.ForkJoinTask.doExec()I java.base@21-internal (37 bytes)
```

I get this assert once every five to ten times I try this.