4 ms·

I've had a bug that seemed like time travel before. I was doing something weird with threading and unix pipes. Then I was trying to print out some debug informa

I've had a bug that seemed like time travel before. I was doing something weird with threading and unix pipes. Then I was trying to print out some debug information, but an unrelated string got printed out instead. This unrelated string never should have been printed to the pipe in question in the first place (!), and also didn't even exist at the point where it got printed out - being calculated a few lines down (!!). The issue went away when I fixed a seemingly unrelated bug (that didn't look like it involved undefined behavior at all), but it all still gives me nightmares to this day D: The C is dark and full of terrors.

Spearchucker 12y ago
Heisenbugs. They're devilspwan. I encountered something similar in VB.Net of all languages. Visual Studio Express has a bug in that adding a custom control to a Windows Form seems to drop the line from the auto -generated code that initializes that control. The error message said that it tried to assign a string to an integer or something, in code that executes way after the form is initialized. Took me ages to work that one out...! http://en.m.wikipedia.org/wiki/Heisenbug http://en.m.wikipedia.org/wiki/Heisenbug