[windows] What is %0|%0 and how does it work?

If you run a .bat or .cmd file with %0|%0 inside, your computer starts to use a lot of memory and after several minutes, is restarted. Why does this code block your Windows? And what does this code programmatically do? Could it be considered a "bug"?

This question is related to windows command-line

The answer is

This is the Windows version of a fork bomb.

%0 is the name of the currently executing batch file. A batch file that contains just this line:


Is going to recursively execute itself forever, quickly creating many processes and slowing the system down.

This is not a bug in windows, it is just a very stupid thing to do in a batch file.

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