If UpArrow is pressed during "Press any key to continue...", then lockup unless more keys are pressed!

[howaboutsynergy]

What steps will reproduce the problem?

1. In Options->Configuration, in Configure options window set Pause after run to (*) Always , click [OK].
2. type a command, ie. echo and press Enter

now you're prompted: Press any key to continue...

3. press and release the UpArrow? key then pause for no more than 1 second and press any other key such as Enter key. This combination (UpArrow?, pause, Enter) can be repeated 6 times before it returns to mc panels!

3. If you pause for more then 1 second then press Enter, it returns to 'mc' panels instantly!

3. or, press and release UpArrow? then press and hold any key like the key 'a'(or even UpArrow? itself) until 2 seconds later when you see it return to mc panels.

3. or, repeatedly press and release UpArrow? with pauses of more than 1 second! it never returns to 'mc' panels!

$ LC_MESSAGES=C mc -V
GNU Midnight Commander 4.8.23-82-gb633256c7
Built with GLib 2.62.0
Using the S-Lang library with terminfo database
With builtin Editor
With subshell support as default
With support for background operations
With mouse support on xterm
With internationalization support
With multiple codepages support
Virtual File Systems: cpiofs, tarfs, sfs, extfs, ftpfs, sftpfs, fish
Data types: char: 8; int: 32; long: 64; void *: 64; size_t: 64; off_t: 64;

$ LC_MESSAGES=C mc -F
Home directory: /home/user
Profile root directory: /home/user

[System data]
    Config directory: /etc/mc/
    Data directory:   /usr/share/mc/
    File extension handlers: /usr/lib/mc/ext.d/
    VFS plugins and scripts: /usr/lib/mc/
	extfs.d:        /usr/lib/mc/extfs.d/
	fish:           /usr/lib/mc/fish/

[User data]
    Config directory: /home/user/.config/mc/
    Data directory:   /home/user/.local/share/mc/
	skins:          /home/user/.local/share/mc/skins/
	extfs.d:        /home/user/.local/share/mc/extfs.d/
	fish:           /home/user/.local/share/mc/fish/
	mcedit macros:  /home/user/.local/share/mc/mc.macros
	mcedit external macros: /home/user/.local/share/mc/mcedit/macros.d/macro.*
    Cache directory:  /home/user/.cache/mc/

$ mc --configure-options
 '--prefix=/usr' '--sysconfdir=/etc' '--libexecdir=/usr/lib' '--enable-background' '--enable-network' '--enable-netcode' '--enable-charset' '--enable-nls' '--with-vfs' '--with-edit' '--with-screen=slang' '--without-x' '--without-samba' '--without-gpm-mouse' '--without-gnome' '--without-debug' '--without-included-gettext' '--disable-dependency-tracking' '--enable-tests'

$ echo $TERM
xterm-256color

$ xfce4-terminal --version
xfce4-terminal 0.8.8git-5625bc0 (Xfce 4.14)

Thanks for your consideration.

[andrew_b]

I think this is coming from #2988.