I once refactored a 15K line single function written in Matlab with no tests, source control, comments, docs, etc. Someone had very helpfully nested the entire

I once refactored a 15K line single function written in Matlab with no tests, source control, comments, docs, etc. Someone had very helpfully nested the entire function in a try catch block which displayed "the program experienced an error" in lieu of any exception being thrown because "they were told to handle exceptions"