https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103444
--- Comment #2 from kargl at gcc dot gnu.org --- % gfcx -o z -fopenmp -g async_io_1.f90 % gdb ./z (gdb) run Starting program: /home/kargl/tmp/z [New LWP 118209 of process 77440] Thread 2 received signal SIGBUS, Bus error. [Switching to LWP 118209 of process 77440] 0x0000000800f1815a in _Unwind_ForcedUnwind (exc=0x801a12738, stop=0x8006910b0, stop_argument=0x0) at ../../../gcc/libgcc/unwind.inc:215 215 exc->private_1 = (_Unwind_Ptr) stop; (gdb) bt #0 0x0000000800f1815a in _Unwind_ForcedUnwind (exc=0x801a12738, stop=0x8006910b0, stop_argument=0x0) at ../../../gcc/libgcc/unwind.inc:215 #1 0x0000000800690efc in ?? () from /lib/libthr.so.3 #2 0x0000000800690e70 in ?? () from /lib/libthr.so.3 #3 0x0000000800690d1b in pthread_exit () from /lib/libthr.so.3 #4 0x0000000800690833 in ?? () from /lib/libthr.so.3 #5 0x0000000000000000 in ?? () Backtrace stopped: Cannot access memory at address 0x7fffdfffe000 Not sure where to go from here.