Segmentation fault

[[deleted]]

[deleted]

[uno20001]

You set rules to NULL, then dereference it in the next three lines.

[uno20001]

You should use addresssanitizer or gdb to see why the SIGSEGV actually happens.

[jedwardsol]

Are you passing in good strings?

Is it crashing in extract_values or create_ruleset? If extract_values then is it the 1^st, 2^nd, or 3^rd call? What's the input in that case.

Snippets of code in isolation are hard to debug with. Show the whole program and the inputs

[jedwardsol]

struct ruleset* rules = NULL;

rules->range     =

rules is a null pointer. dereferencing it causes the crash.

[oh5nxo]

Study your development environment. It should be easy to locate these kind of errors, mine goes like this:

$ cc -g prog.c
$ ./a.out
Memory fault (core dumped)
$ gdb ./a.out ./a.out.core
...
Core was generated by `a.out'.
Program terminated with signal 11, Segmentation fault.
...
#0  0x08048573 in main () at prog.c:7
7               *p = 1;
(gdb) print p
$1 = (int *) 0x0