- You can extend logging to gather additional information to reproduce it.
- You can try to reason about the code and figure out possible causes.
- You can attempt to formally verify the correctness of the code.
- You can put guards into the code against unexpected states and actions.
- You can verify the correct result of previous actions before any destructive actions.
- If all fails you can scrap the piece of code in question since it seems to be beyond your ability to maintain.
- You can extend logging to gather additional information to reproduce it.
- You can try to reason about the code and figure out possible causes.
- You can attempt to formally verify the correctness of the code.
- You can put guards into the code against unexpected states and actions.
- You can verify the correct result of previous actions before any destructive actions.
- If all fails you can scrap the piece of code in question since it seems to be beyond your ability to maintain.