src/term.rs

@@ -434,16 +434,14 @@ impl Term {
         clear_line(self)
     }
 
-    /// Clear the last `n` lines before the current line, if possible.
+    /// Clear the last `n` lines before the current line.
     ///
     /// Position the cursor at the beginning of the first line that was cleared.
-    /// Error when `n` is larger than the number of lines before the current cursor.
+    ///
+    /// **Caution.** When `n` is larger than the number of lines above the
+    /// current cursor, the top `n` lines are cleared --- including some lines
+    /// below the cursor.
     pub fn clear_last_lines(&self, n: usize) -> io::Result<()> {
-        let (current_row, _) = get_cursor_position(self)?;
-        if usize::from(current_row) < n {
-            // We cannot move up n lines, only current_row ones.
-            return Err(io::Error::new(io::ErrorKind::Other, format!("can only move up {} lines, not {}", current_row, n)));
-        }
         self.move_cursor_up(n)?;
         for _ in 0..n {
             self.clear_line()?;