There is a specific argument to g that causes a Segmentation Fault.

You should be able to find the number from looking at the assembly code, but you can also confirm by putting the assembly code for g and f in a $.$s file along with the code below. Then change the argument that main calls g with, assemble to an executable with gcc$,$ and run the program.

main:

movq $$42,\%$rdi

call g

movq $$0,\%$rax

ret

$.$LC$0$:

$.$text

$.$globl main

$.$type main, @function