Discussion on: What Leads to Coding Mistakes?

[Kaamkiya]

There are infinite thing that can cause errors, but some of the most common are ...

• Not being on the same page as co-workers or other people on your team
• Not understanding the codebase
• Using C++
• Writing unreadable code
• Not commenting code
• Using nondescript variable names (naming a variable hp instead of heightOfPerson, for example)

... and more.

[ProgramCrafter]

Let me continue with fairly more complex, but yet not uncommon reasons!

• Overcertainty that input will have certain properties (often coupled with not having project structure in mind);
• Trying to change existing code to do similar, but another, thing;
• Writing functions with large amount of parameters of one type, then accidentally swapping them;
• Separating logically connected variables into separate objects, then expecting them to be consistent.

[Bernd Wechner]

Tee hee, had to chuckle a little as part of me thinks that one source of errors is in fact the misapplication of ideas, like "infinite" (there most certainly is not an infinite source of errors I can assure you, not even almost).