https://bugs.gentoo.org/768285
--- a/lib/tty/tty-ncurses.c
+++ b/lib/tty/tty-ncurses.c
@@ -135,42 +135,46 @@ tty_clip (int *y, int *x, int *rows, int *cols)
         *rows += *y;
 
         if (*rows <= 0)
             return FALSE;
 
         *y = 0;
     }
 
     if (*x < 0)
     {
         *cols += *x;
 
         if (*cols <= 0)
             return FALSE;
 
         *x = 0;
     }
 
     if (*y + *rows > LINES)
         *rows = LINES - *y;
+    if (*rows <= 0)
+        return FALSE;
     if (*x + *cols > COLS)
         *cols = COLS - *x;
+    if (*cols <= 0)
+        return FALSE;
 
     return TRUE;
 }
 
 /* --------------------------------------------------------------------------------------------- */
 /*** public functions ****************************************************************************/
 /* --------------------------------------------------------------------------------------------- */
 
 int
 mc_tty_normalize_lines_char (const char *ch)
 {
     char *str2;
     int res;
 
     struct mc_tty_lines_struct
     {
         const char *line;
         int line_code;
     } const lines_codes[] = {
         {"\342\224\230", ACS_LRCORNER}, /* ┌ */