| Bytes | Lang | Time | Link |
|---|---|---|---|
| 042 | LaTeX | 250609T192340Z | Skillmon |
| 010 | IniTeX | 250606T233014Z | Skillmon |
| 014 | Plain TeX | 250606T230049Z | Skillmon |
| 018 | Plain TeX | 250606T225859Z | John |
LaTeX, 42 bytes
\documentclass{cd}\document\hsize0pta\stop
IniTeX, 10 Bytes
In IniTeX the \hsize is already 0pt, but we can't use a character to get the overfull box because no font is set up, \vrule creates a 0.4pt wide rule for us.
\vrule\end
Plain TeX, 14 Bytes
\hsize0pta\bye
Plain TeX, 18 Bytes
\hbox to0pt{a}\bye