(gdb) b utils.c:46
Breakpoint 1 at 0x41fa65: utils.c:46. (2 locations)
(gdb) r add element nat2 subnettoip '{'2.2.2.0/24:50.50.50.12'}'
Starting program: /usr/local/sbin/nft add element nat2 subnettoip '{'2.2.2.0/24:50.50.50.12'}'

Breakpoint 1, xrealloc (ptr=0x0, size=536870920) at utils.c:46
46                      memory_allocation_error();
(gdb) bt
#0  xrealloc (ptr=0x0, size=536870920) at utils.c:46
#1  0x00007ffff7505b3a in __gmpz_realloc () from /usr/lib/x86_64-linux-gnu/libgmp.so.10
#2  0x00007ffff75077b1 in __gmpz_sub () from /usr/lib/x86_64-linux-gnu/libgmp.so.10
#3  0x000000000041db59 in ei_alloc (left=left@entry=0x7ffffffde120, right=right@entry=0x7ffffffde130, expr=0x6621b0, flags=flags@entry=(unknown: 0)) at segtree.c:91
#4  0x000000000041dbf9 in expr_to_intervals (set=0xd61e40, keylen=keylen@entry=32, intervals=intervals@entry=0x7ffffffde180) at segtree.c:321
#5  0x000000000041df62 in set_overlap (set=<optimized out>, keylen=32, init=0x661af0, msgs=0x7fffffffe400) at segtree.c:355
#6  set_to_segtree (add=true, tree=0x7fffffffe240, init=0x661af0, set=0x661eb0, msgs=0x7fffffffe400) at segtree.c:381
#7  set_to_intervals (errs=0x7fffffffe400, set=0x661eb0, init=init@entry=0x661af0, add=add@entry=true) at segtree.c:547
#8  0x0000000000406fe2 in __do_add_setelems (ctx=0x7fffffffe380, h=0x661bc0, set=<optimized out>, expr=0x661af0, excl=<optimized out>) at rule.c:892
#9  0x00000000004089e7 in do_command (ctx=ctx@entry=0x7fffffffe380, cmd=cmd@entry=0x661b80) at rule.c:1349
#10 0x0000000000406ae1 in nft_netlink (msgs=0x7fffffffe400, state=0x7fffffffe410) at main.c:193
#11 nft_run (scanner=scanner@entry=0x661600, state=state@entry=0x7fffffffe410, msgs=msgs@entry=0x7fffffffe400) at main.c:235
#12 0x0000000000406636 in main (argc=<optimized out>, argv=<optimized out>) at main.c:361
(gdb) c
Continuing.
utils.c:46: Memory allocation failure
[Inferior 1 (process 21218) exited with code 02]