Aborting from core/sync/mutex.d(147) Error: pthread_mutex_init failed.

[mitchell]

Hello,

I've just finished migrating a project from GDC/Makefile to LDC 
with dub. The program now compiles and runs, and works fine until 
such time as the following error occurs:

Aborting from core/sync/mutex.d(147) Error: pthread_mutex_init 
failed.

out of GDB, the whole text is:

Aborting from core/sync/mutex.d(147) Error: pthread_mutex_init 
failed.
Thread 1 "squares" received signal SIGABRT, Aborted.
[Switching to Thread 0x7ffff74a7580 (LWP 7576)]
__GI_raise (sig=sig at entry=6) at 
../sysdeps/unix/sysv/linux/raise.c:50
50	../sysdeps/unix/sysv/linux/raise.c: No such file or directory.

and the backtrace is (sorry for info dump):

#0  __GI_raise (sig=sig at entry=6) at 
../sysdeps/unix/sysv/linux/raise.c:50
#1  0x00007ffff76eb535 in __GI_abort () at abort.c:79
#2  0x00007ffff7ac4fa7 in 
_D4core8internal5abortQgFNbNiNfMAyaMQemZv ()
    from /lib/x86_64-linux-gnu/libdruntime-ldc-shared.so.82
#3  0x00007ffff7acd7e3 in core.sync.mutex.Mutex.~this() ()
    from /lib/x86_64-linux-gnu/libdruntime-ldc-shared.so.82
#4  0x00007ffff7af12ae in rt_finalize2 () from 
/lib/x86_64-linux-gnu/libdruntime-ldc-shared.so.82
#5  0x00007ffff7adb7bf in 
_D2gc4impl12conservativeQw3Gcx5sweepMFNbZm ()
    from /lib/x86_64-linux-gnu/libdruntime-ldc-shared.so.82
#6  0x00007ffff7ad89b2 in 
_D2gc4impl12conservativeQw3Gcx11fullcollectMFNbbZm ()
    from /lib/x86_64-linux-gnu/libdruntime-ldc-shared.so.82
#7  0x00007ffff7ada126 in 
_D2gc4impl12conservativeQw3Gcx10smallAllocMFNbhKmkZPv ()
    from /lib/x86_64-linux-gnu/libdruntime-ldc-shared.so.82
#8  0x00007ffff7ad6c44 in 
_D2gc4impl12conservativeQw14ConservativeGC__T9runLockedS_DQCeQCeQCcQCnQBs12mallocNoSyncMFNbmkKmxC8TypeInfoZPvS_DQEgQEgQEeQEp10mallocTimelS_DQFiQFiQFgQFr10numMallocslTmTkTmTxQCzZQFcMFNbKmKkKmKxQDsZQDl () from /lib/x86_64-linux-gnu/libdruntime-ldc-shared.so.82
#9  0x00007ffff7ad92df in 
_DThn16_2gc4impl12conservativeQw14ConservativeGC6qallocMFNbmkxC8TypeInfoZS4core6memory8BlkInfo_ () from /lib/x86_64-linux-gnu/libdruntime-ldc-shared.so.82
#10 0x00007ffff7addbd0 in gc_qalloc () from 
/lib/x86_64-linux-gnu/libdruntime-ldc-shared.so.82
#11 0x00007ffff7ac9fb2 in 
_D4core6memory2GC6qallocFNaNbmkxC8TypeInfoZSQBqQBo8BlkInfo_ ()
    from /lib/x86_64-linux-gnu/libdruntime-ldc-shared.so.82
#12 0x00007ffff7af0519 in _d_newarrayU () from 
/lib/x86_64-linux-gnu/libdruntime-ldc-shared.so.82
#13 0x00005555556b9682 in 
_D7squares4core5coord5Coord9adjacentsMxFNdZASQBrQBmQBkQBh 
(this=...)
     at 
/home/mitchell/Apps/D/games/squares/src/squares/core/coord.d:102

There are several frames above #13 here, but #13 is the last line 
of "my" code, and the deeper ones (appear?) to be runtime and 
phobos stuff.The lines immediately around coord.d:102 are:

     Coord[] adjacents() const @property
     {
         return [ right, up, left, down ]; // line 102
     }

which are defined in a struct called "Coord". I suspect that 
there isn't something wrong specifically with this line, and 
instead something more "amazingly" wrong. Given that this worked 
fine with the previous (and older) version of GDC which I used 
before my migration, I don't know what could be wrong.

I'm just not entirely certain where to start looking for 
problems. If this issue is over-broad, I'm sorry. Elsewhere in 
the program, I make use of the core.thread and Thread things, 
however that implementation seems fairly straightforward and 
fine, and never had issues under the old compiler.

Any and all help is appreciated!