Program received signal SIGFPE: Floating-point exception - erroneous arithmetic operation.

Backtrace for this error:
#0  0x14813bd437a2 in ???
#1  0x14813bd42935 in ???
#2  0x14813b15f5af in ???
#3  0x50549e in find_mx_regions
	at ../private/report.f90:703
#4  0x50549e in __report_MOD_do_report
	at ../private/report.f90:376
#5  0x527431 in __read_model_MOD_finish_load_model
	at ../private/read_model.f90:192
#6  0x5e1ebe in model_builder
	at ../private/init.f90:1018
#7  0x5e3b44 in __init_MOD_load_zams_model
	at ../private/init.f90:799
#8  0x5dab56 in __remove_shells_MOD_do_relax_to_star_cut
	at ../private/remove_shells.f90:1372
#9  0x5db85a in __remove_shells_MOD_do_remove_surface
	at ../private/remove_shells.f90:1000
#10  0x5dd728 in __remove_shells_MOD_do_remove_surface_at_cell_k
	at ../private/remove_shells.f90:705
#11  0x40af66 in __star_lib_MOD_star_remove_surface_at_cell_k
	at ../public/star_lib.f90:2592
#12  0x407575 in __run_star_extras_MOD_extras_finish_step
	at ../src/run_star_extras.f90:208
#13  0x4247e8 in __run_star_support_MOD_after_step_loop
	at ../job/run_star_support.f90:735
#14  0x42793d in __run_star_support_MOD_do_evolve_one_step
	at ../job/run_star_support.f90:182
#15  0x4281b5 in __run_star_support_MOD_run1_star
	at ../job/run_star_support.f90:119
#16  0x40900a in __run_star_MOD_do_run_star
	at /n/netscratch/conroy_lab/Lab/ebauer/mesa-git-tests/tmp.rLJ1GhCPdr/star/job/run_star.f90:26
#17  0x40909a in run
	at ../src/run.f90:13
#18  0x409109 in main
	at ../src/run.f90:2
./rn1: line 6: 790329 Floating point exception(core dumped) ./star