henrygarnerWe found an undocumented bug in the Apollo 11 guidance computer code
https://www.juxt.pro/blog/a-bug-on-the-dark-side-of-the-moon/
Software that ran on 4KB of memory and got humans to the moon still has undiscovered bugs in it. That says something about the complexity hiding in even the smallest codebases.
My guess is that in such low memory regimes, program length is very loosely correlated with bug rate.
If anything, if you try to cram a ton of complexity into a few kb of memory, the likelihood of introducing bugs becomes very high.