Seem to me this list needs to incorporate how easily these bugs could have been avoided/detected/fixed, rather than just how dire the consequences were. It doesn't say much about what people did to test their code. For instance the first one in the list is something unit testing would have fixed. Take the trajectory function, plug numbers in, see if it's correct.
Some of these things were a lot more obvious than others.
Race conditions, for example, can be really hard to find, but as long as you know it might happen (these days it's just about every system) you can take precautions for testing. If it's important, maybe hire someone with experience.
The AT&T network crash thing looks pretty unobvious to me. A network graph can have a huge number of topologies, so you can't really test them all. Machines might also be using different versions of software that don't interact nicely. Sounds like they took sensible precautions and were thus able to roll back. That's why "rollback" is a word.
There's a whole class of bugs where things work and then need to be upgraded. You think it will work, because there aren't many changes and stuff is qualitatively the same. Like the number overflow bug in the Ariadne, or the buffer overflow in the finger daemon.
Some of these things were a lot more obvious than others.
Race conditions, for example, can be really hard to find, but as long as you know it might happen (these days it's just about every system) you can take precautions for testing. If it's important, maybe hire someone with experience.
The AT&T network crash thing looks pretty unobvious to me. A network graph can have a huge number of topologies, so you can't really test them all. Machines might also be using different versions of software that don't interact nicely. Sounds like they took sensible precautions and were thus able to roll back. That's why "rollback" is a word.
There's a whole class of bugs where things work and then need to be upgraded. You think it will work, because there aren't many changes and stuff is qualitatively the same. Like the number overflow bug in the Ariadne, or the buffer overflow in the finger daemon.