Terminal unresponsive when keyboard is opened while 'Display all 1209 possiblilities? (y or n)' prompt is displayed

[Matthijs Nicolai]

On BQ aquaris Ubuntu edition.

Steps to reproduce:
- Open terminal app
- Enter passcode
- double tap somwhere in the terminal screen sucht that the following line is displayed:
    'Display all 1209 possibilities? (y or n)'
- Tap the keyboard button to open keyboard
- Tap in the terminal output area to close the 'Display all 1209 possibilities? (y or n)' message
- Now the terminal does not respond to keypresses anymore.

OS version:
Ubuntu Utopic Unicorn (development branch) - armhf (20150410-232623)

[Matthijs Nicolai (matthijs-w)]

Further investigation shows that although the message 'Display all 1209 possibilities (y or n)' is not displayed anymore, it still is there.
So the terminal only responds to characters y and n.

[Filippo Scognamiglio (flscogna)]

I can definitely reproduce the issue. As you say, the line is still there, but for some reason it's now shown anymore. I'll look into it.

[Stefano Verzegnassi (verzegnassi-stefano)]

This is reproducible with any terminal emulator (e.g. konsole, gnome-terminal, xterm)

On a desktop:
1) Launch the terminal emulator
2) Type e.g. "a"
3) Press "Tab" for auto-completion
4) Resize the emulator window
5) Press "Tab" again

I would say there could be something wrong in some upstream project (e.g. bash).

This report should be considered "Invalid" for terminal-app (the problem exists in another project), however it's true that it's much easier to trigger this bug on terminal-app, since:

 * The on-screen keyboard causes an update of the terminal widget size any time it's shown/hidden.
 * The "Tab" key is emulated by a single-tap gesture, which is often activated by mistake.

I will look on the net for further informations on this bug. Anyway, I think it's worth to discuss about some improvement in the UX, in order to make harder to encounter the issue.