Problem:    GTK3: window manager resize hints are incomplete.
Solution:   Use NULL for second argument of gtk_window_set_geometry_hints().
            (Kenny Stauffer closes #11055)

Problem:    Mixing package managers is not a good idea.
Solution:   Install gcc 13 with apt-get. (closes #12405)

Problem:    Display wrong when moving cursor to above the top line and
            'smoothscroll' is set.
Solution:   Call adjust_skipcol() in more places and make it work better.
            (Luuk van Baal, closes #12395)

Problem:    Win32: When 'encoding' is set $PATH has duplicate entries.
Solution:   Only append the directory if it is not there yet. (Ken Takata,
            closes #12400, closes #12372)

Problem:    Function argument types not always checked and using v:none may
            cause an error.
Solution:   Check argument types once the function type is known.  Do not give
            an error for using v:none as an argument. (closes #12200)

Problem:    Wrong error for unreachable code after :throw.
Solution:   Adjust the error message.

Problem:    Test failures for unreachable code.
Solution:   Add a test override to ignore unreachable code.

Problem:    Vim9: error for missing "return" after "throw".
Solution:   Set had_return flag for "throw". (closes #12262)

Problem:    setcharsearch() does not clear last searched char properly.
Solution:   Do not accept lastc_bytelen smaller than one. (closes #12398)