Deregisters the given thread from use with the runtime. If this routine
is called for a thread which is not registered, the result is undefined.
NOTE: This routine does not run thread-local static destructors when called.
If full functionality as a D thread is desired, the following function
must be called by the detached thread, particularly if the thread is
being detached at some indeterminate time before program termination:
The D Programming Language's Unofficial Docs
beta
Deregisters the given thread from use with the runtime. If this routine is called for a thread which is not registered, the result is undefined.
NOTE: This routine does not run thread-local static destructors when called. If full functionality as a D thread is desired, the following function must be called by the detached thread, particularly if the thread is being detached at some indeterminate time before program termination:
extern(C) void rt_moduleTlsDtor();