Logic bugs tend to affect the feature that the offending code is meant to support -- if the feature isn't working correctly, it's probably a logic bug in the im

Logic bugs tend to affect the feature that the offending code is meant to support -- if the feature isn't working correctly, it's probably a logic bug in the implementation, so you can look there. Memory safety bugs, on the other hand, can have unpredictable results that are far away from the code that actually caused the problem. Usually it's possible to figure it out from clues like, "the program only crashes after I use this particular feature" but sometimes memory safety bugs can stick around for a long time without anyone figuring out why every once in a while the program crashes for unexplained reasons. If someone submits a pull request adding some feature to a big project, then the stakes of accidentally approving a bad change are (usually) a lot less if you're only concerned with logic bugs and they only affect that feature.