neovim crashes with ncurses-6.0-20170819

[Leonardo Brondani Schenkel]

On 2017-08-20 03:04, Thomas Dickey wrote:
> 20170819
>         + update "iterm" entry -TD
>         + add "iterm2" entry (report by Leonardo Brondani Schenkel) -TD
>         + regenerate llib-* files.
>         + regenerate HTML manpages.
>         + improve picsmap test-program:
>           + reduce memory used for tsearch
>           + add report in log file showing cumulative color coverage.
>         + add -x option to clear/tput to make the E3 extension optional
>           (cf: 20130622).
>         + add options -T and -V to clear command for compatibility with tput.
>         + add usage message to clear command (Debian #371855).
>         + improve usage messages for tset and tput.
>         + minor fixes to "RDGB" extension and reset_color_pairs().

FYI: when I upgraded my terminfo to this version (1.607), and when $TERM 
is set to 'tmux', NeoVim crashes:

nvim: unibilium.c:735: unibi_get_str: Assertion `v > unibi_string_begin_ 
&& v < unibi_string_end_' failed.
zsh: abort (core dumped)  nvim

I know this is a bug in the unibilium library and has nothing to do with 
ncurses. I'm posting here just to make the members of this list aware. 
I'm going to file a bug against unibilium.

I have bisected the ncurses sources and I have confirmed that the change 
to the terminal definition that upset unibilium was introduced in 
terminfo 1.607/20170819. I can reproduce the NeoVim crash in Ubuntu and 
macOS.

// Leonardo.