An industry veteran in my circles has recently made the rookie mistake¹ of printing a warning from his code upon misuse. Surprisingly to nobody experienced, critical workflows soon came to a screeching halt.

It turned out that a program using his code prints something like “yay, done” upon exit, and scripts expect it to be the last thing it says. But now those warnings occasionally got printed from destructors or such, after the “yay, done”, making the scripts think the program failed.

One might think that this prompted people to fix the reported misuse, and that thought would be another rookie mistake. Instead, they were quick to point out that it’s hard to know where these warnings could come from, and we cannot risk all those critical workflows failing when some case of misuse surfaces in a new context.

I mean, you could grep to get an upper bound, and if you did, not that many places would come up. But one could then say, as some in fact did, that maybe you haven’t grepped everywhere you should have, and even the cases you did find are owned by many different teams, so we won’t get the fixes quickly enough, etc.

Several solutions were suggested by helpful high-ranking people:

• You could add a destructor printing “yay, done” again if a warning was printed during the destruction sequence (opening an interesting technical debate about the differences between a destructor, __attribute__((destructor)), an atexit handler and other unspeakable horrors). In fact, our industry veteran would later learn, and I swear that I’m not making this up, that this was already implemented by someone else who printed something during the program termination sequence, and had to appease the scripts.
• You could suppress the warnings by default, and enable them upon request (opening a debate about the runtime method to enable them, and the appropriate circumstances to do this).
• You could write those warnings to their own file, and…

When I was done scrolling his work chat with these helpful suggestions, our unfortunate industry veteran put on a melancholy smile and summarized the situation: “All means are fair except solving the problem.”²