MC fails to recognize 7z password prompt

[herbert_durr]

when using a password-encrypted 7zip archive, MC fails to ask for it and doesnt react on any user input.
the 7z process has to be killed for MC to respond.

GNU Midnight Commander 4.7.5.1
Built with GLib 2.28.0
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 and Linux console
With support for X11 events
With internationalization support
With multiple codepages support
Virtual File Systems: cpiofs, tarfs, sfs, extfs, ftpfs, fish
Data types: char: 8; int: 32; long: 64; void *: 64; size_t: 64; off_t: 64;