Fix continued lines not having their continued status reset on line feed

Fixes #4837

docs/changelog.rst

@@ -87,6 +87,9 @@ Detailed list of changes
 
 - Bash integration: Prevent shell integration code from running twice if user enables both automatic and manual integration
 
+- Fix continued lines not having their continued status reset on line feed (:iss:`4837`)
+
+
 0.24.4 [2022-03-03]
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 

kitty/screen.c

@@ -1355,6 +1355,7 @@ screen_linefeed(Screen *self) {
     bool in_margins = cursor_within_margins(self);
     screen_index(self);
     if (self->modes.mLNM) screen_carriage_return(self);
+    if (self->cursor->y < self->lines) linebuf_mark_line_as_not_continued(self->linebuf, self->cursor->y);
     screen_ensure_bounds(self, false, in_margins);
 }
 

kitty_tests/screen.py

@@ -293,6 +293,18 @@ class TestScreen(BaseTest):
         self.ae(str(s.linebuf), '55555\n66666\n77777\n88888\n99999')
         s.resize(5, 2)
         self.ae(str(s.linebuf), '88\n88\n99\n99\n9')
+        s = self.create_screen()
+        s.draw('a' * s.columns)
+        s.linefeed(), s.carriage_return()
+        s.draw('bb')
+        s.resize(s.lines, s.columns - 2)
+        self.ae(str(s.linebuf), 'aaa\naa\nbb\n\n')
+        s.cursor.y = s.cursor.x = 0
+        s.draw('x' * len(str(s.line(0))))
+        s.linefeed(), s.carriage_return()
+        s.draw('x' * len(str(s.line(1))))
+        s.resize(s.lines, s.columns + 4)
+        self.ae(str(s.linebuf), 'xxx\nxx\nbb\n\n')
 
     def test_cursor_after_resize(self):