Debugging c code tips?

[Solution] is on #18 - but i'll keep these note for future reference.

Right now i'm trying to figure out why the program completely crashes when i first run it? This is what happens when i try to debug my Pinetime. When i do my first step it just crashes. When i don't debug it, it the build works just fine?

(gdb) load
Loading section .text, size 0x449dc lma 0x1f000
Loading section .ARM.exidx, size 0x8 lma 0x639dc
Loading section .data, size 0xa0 lma 0x639e4
Loading section .fs_data, size 0x10 lma 0x63a84
Start address 0x1f7bc, load size 281236
Transfer rate: 20 KB/sec, 13392 bytes/write.
(gdb) step
Single stepping until exit from function Reset_Handler,
which has no line number information.
Note: automatically using hardware breakpoints for read-only addresses.
SystemInit () at targetlibs/nrf5x_12/components/toolchain/system_nrf52.c:67
67          if (errata_16()){