Segmentation fault on memory hooks test in jenkins

[alinask]

21:18:06 malloc_hooks: initialized
21:18:06 Allocating memory
21:18:06 After core malloc: mapped=1048576
21:18:06 After mmap malloc: mapped=2101248
21:18:06 After mmap: mapped=1048576
21:18:06 After munmap: unmapped=1048576
21:18:06 After mmap free + trim: unmapped=2101248
21:18:06 After another mmap from dynamic lib: mapped=1048576
21:18:06 After core malloc free: unmapped=1048576
21:18:06 malloc_hooks: PASS
21:18:06 + for tname in malloc_hooks external_events flag_no_install
21:18:06 + echo '==== Running memory hook (external_events) on MPI ===='
21:18:06 ==== Running memory hook (external_events) on MPI ====
21:18:06 + mpirun -x UCX_ERROR_SIGNALS -x UCX_HANDLE_ERRORS -mca pml ob1 -mca btl vader,self -mca coll '^hcoll,ml' -np 1 taskset -c 4,5 ./test/mpi/test_memhooks -t external_events
21:18:06 external_events: initialized
21:18:06 totmapped 0
21:18:06 After ucm_vm_mmap called: mapped=1048576
21:18:06 After ucm_vm_munmap: unmapped=1048576
21:18:06 external_events: PASS
21:18:06 [hpc-test-node2:49599] *** Process received signal ***
21:18:06 [hpc-test-node2:49599] Signal: Segmentation fault (11)
21:18:06 [hpc-test-node2:49599] Signal code: Address not mapped (1)
21:18:06 [hpc-test-node2:49599] Failing at address: 0x7ffff0a48acb
21:18:08 --------------------------------------------------------------------------
21:18:08 mpirun noticed that process rank 0 with PID 0 on node hpc-test-node2 exited on signal 11 (Segmentation fault).
21:18:08 --------------------------------------------------------------------------

http://hpc-master.lab.mtl.com:8080/job/hpc-ucx-pr/4088/label=hpc-test-node2,worker=3/console

[hoopoepg]

have we stable reproducer?

[yosefe]

not reproduced anymore, will reopen if needed