Buffer corruption when the terminal is resized.

[Paul Peet]

I would like to report a bug with bash (readline?). This bug can be
reproduced by opening gnome-terminal with bash running. By quickly
horizontally resizing the terminal window you can see that the buffer
seems to be corrupted as you see repeated or even removed lines or
characters.

At first I thought this might be an issue with gnome-terminal/vte but
this also happens with xterm so the conclusion was that it might be
bash/readline's fault.

This can be reproduced on stock Ubuntu 17.04.

Bash version: 4.4.7(1)-release (x86_64-pc-linux-gnu)
System: Linux 4.10.0-22-generic #24-Ubuntu SMP Mon May 22 17:43:20 UTC
2017 x86_64 x86_64

I've also uploaded a gif which shows this behavior:
https://media.giphy.com/media/3ohze1ynhK8ZDGmpq0/giphy.gif