in src/unixTerminal.ts [273:280]
public resize(cols: number, rows: number): void {
if (cols <= 0 || rows <= 0 || isNaN(cols) || isNaN(rows) || cols === Infinity || rows === Infinity) {
throw new Error('resizing must be done using positive cols and rows');
}
pty.resize(this._fd, cols, rows);
this._cols = cols;
this._rows = rows;
}