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docs/changelog.rst

@@ -196,6 +196,8 @@ Detailed list of changes
 
 - ``edit-in-kitty``: Return exit code from underlying editor process on exit (:iss:`10198`)
 
+- Make erasing last command robust against commands with no output and commands in the scrollback (:pull:`10201`)
+
 
 0.47.4 [2026-06-15]
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

kitty/fast_data_types.pyi

@@ -1261,7 +1261,7 @@ class Screen:
     def test_commit_write_buffer(self, inp: memoryview, output: memoryview) -> int: ...
     def test_parse_written_data(self, dump_callback: None = None) -> None: ...
     def hyperlink_for_id(self, hyperlink_id: int) -> str: ...
-    def erase_last_command(self, include_prompt: bool = True) -> bool: ...
+    def erase_last_command(self) -> bool: ...
     def set_progress(self, state: int, percent: int) -> None: ...
     def mark_potential_url_drag(self) -> bool: ...
 

kitty/screen.c

@@ -4599,10 +4599,7 @@ find_cmd_output(Screen *self, OutputOffset *oo, index_type start_screen_y, unsig
 }
 
 static PyObject*
-erase_last_command(Screen *self, PyObject *args) {
-    int include_prompt = 1;  // retained for API compatibility; the prompt block is the unit erased
-    if (!PyArg_ParseTuple(args, "|p", &include_prompt)) return NULL;
-    (void)include_prompt;
+erase_last_command(Screen *self, PyObject *args UNUSED) {
     if (self->linebuf != self->main_linebuf) Py_RETURN_FALSE;
     Line *line;
     // Erase the most recent command: the prompt block immediately above the
@@ -6244,7 +6241,7 @@ static PyMethodDef methods[] = {
     MND(draw, METH_O)
     MND(apply_sgr, METH_O)
     MND(cursor_position, METH_VARARGS)
-    MND(erase_last_command, METH_VARARGS)
+    MND(erase_last_command, METH_NOARGS)
     MND(set_window_char, METH_VARARGS)
     MND(set_progress, METH_VARARGS)
     MND(set_mode, METH_VARARGS)

kitty_tests/screen.py

@@ -1627,7 +1627,7 @@ class TestScreen(BaseTest):
         s.draw('before\r\n')
         draw_prompt('p1'), draw_output(2), mark_prompt(), s.draw('partial')
         x = s.cursor.x
-        s.erase_last_command(False)  # include_prompt is now a no-op: the prompt block is the unit erased
+        s.erase_last_command()
         self.ae('before\npartial', at().rstrip())
         for scroll in (8, 9, 10):
             s.reset()
@@ -1655,9 +1655,12 @@ class TestScreen(BaseTest):
         s.reset()
         s.draw('before\r\n')
         draw_prompt('p1'), draw_output(1), draw_prompt('e1'), draw_prompt('e2'), mark_prompt(), s.draw('partial')
-        s.erase_last_command(); self.ae('before\n$ p1\n0\n$ e1\npartial', at().rstrip())
-        s.erase_last_command(); self.ae('before\n$ p1\n0\npartial', at().rstrip())
-        s.erase_last_command(); self.ae('before\npartial', at().rstrip())
+        s.erase_last_command()
+        self.ae('before\n$ p1\n0\n$ e1\npartial', at().rstrip())
+        s.erase_last_command()
+        self.ae('before\n$ p1\n0\npartial', at().rstrip())
+        s.erase_last_command()
+        self.ae('before\npartial', at().rstrip())
         # multi-line live prompt: the command region is erased with no residual
         s.reset()
         s.draw('before\r\n')