> In cmcheckmagic we have: > if (!MagicWrap (tty) || curY (tty) >= FrameRows (tty) - 1) > emacs_abort (); > > Is this an assertion that needs to always hold?
I very strongly doubt so myself. And strangely it's _always_ an off-by-one error here just as you sketched below. > I have tried > copy-pasting it at the beginning of tty_write_glyphs and I found that > it fails continuously (e.g. it tests: 62 >= 63-1). Actually I used a > breakpoint instead of emacs_abort. > Are there useful places where I could trace that the assertion holds > true?, earlier places than the current place. I suppose in all those cases curX (tty) == FrameCols (tty) does not hold so the assertion does not trigger. martin
