Shortest code to produce infinite output

Question

Write the shortest code you can that produces an infinite output.

That's all. You code will only be disqualified if it stops producing output at some point. As always in code golf, the shortest code wins.

Here's a list of answers that I think are really clever, so they can get credit:

• The comma is both code and data
• Infinite errors (that counts)
• Infinite warnings (that also counts)
• What's Marbelous?

Leaderboard

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Answer 1

Phooey, 4 bytes

=[?]

Try it online!

Outputs a debug dump repeatedly.

>>> DEBUG <<<
Tape: [>1<]
Stack:
>>> DEBUG <<<
Tape: [>1<]
Stack:
>>> DEBUG <<<
Tape: [>1<]
Stack:
>>> DEBUG <<<
Tape: [>1<]
Stack:
...

=      tape = tape == stack
       since tape and stack are 0, sets it to 1
[      While tape is not 0
   ?     Dump debug info
]      End

---

Phooey (interpreter bug, eventual crash), 2 bytes

<?

Try it online!

Based on my "Raise a SIGSEGV" entry, where an interpreter bug is used to cause an infinite printing loop.

The bug is thoroughly explained in that post.

However, as one might expect, this does eventually (and quickly) segfault. If there was no memory protection, it would run infinitely.

Answer 2

Motorola MC14500B Machine Code, 1.5 bytes

1BC

Explanation

1   # store data in register R
 B  # output R
  C # JMP to the start of the program

Answer 3

C# (72)

using System; class P {static void Main(){for(;;) Console.Write('-');}}

Output