Merlin gives fatal with new global link arrangements in Dragonfly

[fkaplan3]

Merlin gives a fatal error when using the new (relative) global link arrangements in dragonfly2 network: [bungee13:07134] *** Process received signal *** [bungee13:07134] Signal: Segmentation fault (11) [bungee13:07134] Signal code: Address not mapped (1) [bungee13:07134] Failing at address: 0x8 [bungee13:07134] [ 0] /lib64/libpthread.so.0(+0xf7e0)[0x2b4db64407e0] [bungee13:07134] [ 1] /mnt/nokrb/fkaplan3/SST/local/sst-elements/lib/sst-elements-library/libmerlin.so(_ZN3SST6Merlin11PortControl4sendEPNS0_21internal_router_eventEi+0x5f)[0x2b4dc404041f] [bungee13:07134] [ 2] /mnt/nokrb/fkaplan3/SST/local/sst-elements/lib/sst-elements-library/libmerlin.so(_ZN3SST6Merlin9hr_router13clock_handlerEm+0x107)[0x2b4dc405af77] [bungee13:07134] [ 3] sst(_ZN3SST5Clock7executeEv+0xe6)[0x5e1476] [bungee13:07134] [ 4] sst(_ZN3SST10Simulation3runEv+0x19f)[0x6574cf] [bungee13:07134] [ 5] sst[0x5b3e60] [bungee13:07134] [ 6] sst(main+0x218c)[0x5dc73c] [bungee13:07134] [ 7] /lib64/libc.so.6(__libc_start_main+0xfd)[0x2b4db7e80d5d] [bungee13:07134] [ 8] sst[0x5b2f69] [bungee13:07134] *** End of error message ***

Error can be reproduced by using the following configurations: (1) dragonfly2 network with 17 groups (--topo=dragonfly2 --shape=2:4:1:17 --numCores=2) (2) relative global link mode ON (setGlobalRouteModeRelative()) (3) ember+merlin simulation (4) alltoall motif which uses all 136 nodes

[allevin]

@feldergast to investigate