Steps:
Debugging tools:
There are lots of debugging tools out there, for example: debuggers (gdb etc) browser developer tools profilers strace / ltrace tcpdump / wireshark core dumps and even basic things like error messages
Write a unit test
writing a unit test writing a tiny standalone program to reproduce the bug finding a working version of the code and seeing what changed printing out a million things adding extra logging taking a break explaining the bug to a friend
Did anyone else have this problem?
looking through the github issues to see if anything matches
How does a novice and an expert debug?
Their findings did not show a significant difference in the strategies employed by the novices and experts. Experts simply formed more correct hypotheses and were more efficient at finding the fault.