(gdb) run
Starting program: /home/pikhq/plof/prime2

Program received signal SIGSEGV, Segmentation fault.
0x00002b57c15b83c9 in vfprintf () from /lib/libc.so.6
(gdb) backtrace
#0  0x00002b57c15b83c9 in vfprintf () from /lib/libc.so.6
#1  0x00002b57c15c15f8 in fprintf () from /lib/libc.so.6
#2  0x000000000041fc9e in plofInternalDlcall (scope=0x5470c0, funcLval=<value optimized out>) at plof.c:1338
#3  0x00000000004210a6 in plofCall (func=
        {type = TYPE_FUNCTION, {i = 4323888, fl = 2.1362845172652158e-317, s = {length = 4323888, s = 0x1 <Address 0x1 out of bounds>}, o = 0x41fa30, a = 0x41fa30, fu = {func = 0x41fa30 <plofInternalDlcall>, thick = 1, scope = 0x547fd8, params = {count = 2, params = 0x555ee8}}, r = 0x41fa30}}, lval=0, funcLval=0) at plof.c:1158
#4  0x0000000000410ece in plofFunction47 (scope=0x5470f0, funcLval=0) at stdio.plof:74
#5  0x00000000004210a6 in plofCall (func=
        {type = TYPE_FUNCTION, {i = 4262624, fl = 2.1060160795383977e-317, s = {length = 4262624, s = 0x1 <Address 0x1 out of bounds>}, o = 0x410ae0, a = 0x410ae0, fu = {func = 0x410ae0 <plofFunction47>, thick = 1, scope = 0x5472d0, params = {count = 1, params = 0x554ca8}}, r = 0x410ae0}}, lval=0, funcLval=0) at plof.c:1158
#6  0x0000000000410881 in plofFunction51 (scope=0x547108, funcLval=0) at stdio.plof:51
#7  0x00000000004210a6 in plofCall (func=
        {type = TYPE_FUNCTION, {i = 4261392, fl = 2.1054073906627213e-317, s = {length = 4261392, s = 0x1 <Address 0x1 out of bounds>}, o = 0x410610, a = 0x410610, fu = {func = 0x410610 <plofFunction51>, thick = 1, scope = 0x5472d0, params = {count = 1, params = 0x554cf8}}, r = 0x410610}}, lval=0, funcLval=0) at plof.c:1158
#8  0x00000000004104a0 in plofFunction22 (scope=0x547120, funcLval=0) at prime2.plof:35
#9  0x0000000000420f72 in plofCall (func=
        {type = TYPE_FUNCTION, {i = 4260560, fl = 2.1049963280453814e-317, s = {length = 4260560, s = 0x0}, o = 0x4102d0, a = 0x4102d0, fu = {func = 0x4102d0 <plofFunction22>, thick = 0, scope = 0x547fd8, params = {count = 0, params = 0x0}}, r = 0x4102d0}}, lval=0, funcLval=0) at plof.c:1165
#10 0x0000000000406adf in plofFunction119 (scope=0x547138, funcLval=0) at std.plof:55
#11 0x0000000000420f72 in plofCall (func=
        {type = TYPE_FUNCTION, {i = 4220976, fl = 2.0854392335204015e-317, s = {length = 4220976, s = 0x0}, o = 0x406830, a = 0x406830, fu = {func = 0x406830 <plofFunction119>, thick = 0, scope = 0x547180, params = {count = 0, params = 0x0}}, r = 0x406830}}, lval=0, funcLval=0) at plof.c:1165
#12 0x000000000041a48f in plofFunction7 (scope=0x547180, funcLval=0) at std.plof:86
#13 0x0000000000420f72 in plofCall (func=
        {type = TYPE_FUNCTION, {i = 4301232, fl = 2.1250909659930366e-317, s = {length = 4301232, s = 0x0}, o = 0x41a1b0, a = 0x41a1b0, fu = {func = 0x41a1b0 <plofFunction7>, thick = 0, scope = 0x547fd8, params = {count = 2, params = 0x555d80}}, r = 0x41a1b0}}, lval=0, funcLval=0) at plof.c:1165
#14 0x0000000000408227 in plofMain (scope=0x547fd8, funcLval=0) at prime2.plof:7
#15 0x000000000041f51b in main (argc=1, argv=0x7fffe98883d8) at plof.c:1564
(gdb)