[LEAPSECS] Leap year day-count bugs, then and now

Daniel R. Tobias dan at tobias.name
Fri Jan 2 07:40:48 EST 2009


Here's an article about a leap-year bug fairly similar to the one in
current Zume music players which immobilized Wang computers in 1984:

http://thedailywtf.com/Articles/Classic-WTF-The-Bug-That-Shut-Down-
Computers-WorldWide.aspx

Also, the comments section of that article includes the actual code
behind the Zume bug, which involves the system getting put in an
infinite loop on reaching a day number of 366, even though the code
did in fact attempt to be cognizant of leap years.


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