https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68579
--- Comment #2 from vries at gcc dot gnu.org ---
Backtrace:
...
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0x7ffff6f7a700 (LWP 6717)]
gomp_task_maybe_wait_for_dependencies (depend=depend@entry=0x7ffff6f79dd0)
at src/libgomp/task.c:1551
1551 if (next_task->kind == GOMP_TASK_WAITING)
(gdb) bt
#0 gomp_task_maybe_wait_for_dependencies (depend=depend@entry=0x7ffff6f79dd0)
at src/libgomp/task.c:1551
#1 0x00007ffff794b746 in
GOMP_target_enter_exit_data (device=<optimized out>, mapnum=3,
hostaddrs=0x7ffff6f79db0, sizes=0x6012e0
<.omp_data_sizes.35>, kinds=0x6012d0
<.omp_data_kinds.36>, flags=2,
depend=0x7ffff6f79dd0)
at src/libgomp/target.c:1691
#2 0x0000000000400ca9 in main._omp_fn ()
#3 0x00007ffff7943cb6 in gomp_thread_start (xdata=<optimized out>)
at src/libgomp/team.c:119
#4 0x00007ffff77169ca in start_thread () from /lib/libpthread.so.0
#5 0x00007ffff747245d in clone () from /lib/libc.so.6
#6 0x0000000000000000 in ?? ()
...
This valgrind output suggests that next_task is NULL:
...
==13885== Process terminating with default action of signal 11 (SIGSEGV)
==13885== Access not within mapped region at address 0x58
==13885== at 0x514E2FD: gomp_task_maybe_wait_for_dependencies (task.c:1551)
...
