A singleton hello_world assert with the following output: Warning :: opal_list_remove_item - the item 0x1211fc0 is not on the list 0x7f2cd9161ae0 hello: ../../../../ompi/orte/mca/rml/base/rml_base_msg_handlers.c:75: orte_rml_base_post_recv: Assertion `((0xdeafbeedULL << 32) + 0xdeafbeedULL) == ((opal_object_t *) (recv))->obj_magic_id' failed. [dancer:00698] *** Process received signal *** [dancer:00698] Signal: Aborted (6) [dancer:00698] Signal code: (-6) [dancer:00698] [ 0] /lib64/libpthread.so.0[0x3d8480f710] [dancer:00698] [ 1] /lib64/libc.so.6(gsignal+0x35)[0x3d83c32925] [dancer:00698] [ 2] /lib64/libc.so.6(abort+0x175)[0x3d83c34105] [dancer:00698] [ 3] /lib64/libc.so.6[0x3d83c2ba4e] [dancer:00698] [ 4] /lib64/libc.so.6(__assert_perror_fail+0x0)[0x3d83c2bb10] [dancer:00698] [ 5] /home/bosilca/opt/trunk/lib/libopen-rte.so.0(orte_rml_base_post_recv+0x252)[0x7f2cd8e76d55] [dancer:00698] [ 6] /home/bosilca/opt/trunk/lib/libopen-pal.so.0(+0xcca5d)[0x7f2cd89e8a5d] [dancer:00698] [ 7] /home/bosilca/opt/trunk/lib/libopen-pal.so.0(+0xcce53)[0x7f2cd89e8e53] [dancer:00698] [ 8] /home/bosilca/opt/trunk/lib/libopen-pal.so.0(opal_libevent2021_event_base_loop+0x4eb)[0x7f2cd89e99ea] [dancer:00698] [ 9] /home/bosilca/opt/trunk/lib/libopen-rte.so.0(+0x28725)[0x7f2cd8d1b725] [dancer:00698] [10] /lib64/libpthread.so.0[0x3d848079d1] [dancer:00698] [11] /lib64/libc.so.6(clone+0x6d)[0x3d83ce8b6d] [dancer:00698] *** End of error message ***
The same executable run via mpirun with a single process succeed. This is with trunk, I did not tried with the release. George.
