Shortest way to get an EOF Error
APL (Dyalog Unicode) 17.0, 0 bytes





Dyalog 17.0 expects programs to terminate themselves cleanly and will throw an EOF INTERRUPT (and exit with a code 2) if they don't: Try it online!

In contrast, here is the minimal program which does terminate itself cleanly, causing no error (and code 0 upon exit): Try it online!