(gdb) thread apply all bt

Thread 2 (Thread 0xf7c89b40 (LWP 6370)):
#0  0xf7ffb430 in __kernel_vsyscall ()
#1  0xf7e6580b in write () from /usr/lib32/libc.so.6
#2  0xf7df955d in _IO_new_file_write () from /usr/lib32/libc.so.6
#3  0xf7df88a6 in new_do_write () from /usr/lib32/libc.so.6
#4  0xf7dfa4ff in __GI__IO_do_write () from /usr/lib32/libc.so.6
#5  0xf7dfa990 in __GI__IO_file_overflow () from /usr/lib32/libc.so.6
#6  0xf7dfb1c2 in __overflow () from /usr/lib32/libc.so.6
#7  0x08051d64 in std.stdio.writefx(std.c.stdio._iobuf*, TypeInfo[], void*, int).putc(dchar) ()
#8  0x0805240d in std.format.doFormat(void(dchar) delegate, TypeInfo[], void*) ()
#9  0x08051ce9 in std.stdio.writefx(std.c.stdio._iobuf*, TypeInfo[], void*, int) ()
#10 0x08051de2 in std.stdio.writef(, ...) ()
#11 0x08049a4a in a.Job.run() ()
#12 0x08050660 in std.thread.Thread.run() ()
#13 0x08050c00 in std.thread.Thread.threadstart(void*) ()
#14 0xf7f971a6 in start_thread () from /usr/lib32/libpthread.so.0
#15 0xf7e75efe in clone () from /usr/lib32/libc.so.6

Thread 1 (Thread 0xf7d8a700 (LWP 6366)):
#0  0xf7ffb430 in __kernel_vsyscall ()
#1  0xf7f9e4b5 in sem_wait@@GLIBC_2.1 () from /usr/lib32/libpthread.so.0
#2  0x08050a6c in std.thread.Thread.pauseAll() ()
#3  0x080586cb in gcx.Gcx.fullcollect(void*) ()
#4  0x080586a6 in gcx.Gcx.fullcollectshell() ()
#5  0x08057acc in gcx.GC.fullCollect() ()
#6  0x08055c89 in std.gc.fullCollect() ()
#7  0x08049a6d in D main ()