Deleting the first character on a line continuation deletes the last character of the previous line

[fratajczak]

fish version: 3.0.2-1627-gd502ad2c2 and up
Tested on Fedora 31 Linux pc 5.5.16-200.fc31.x86_64 #1 SMP Wed Apr 8 16:43:33 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
The problem seems to be caused by d502ad2, the bug occurs on both gnome-terminal and kitty with a vanilla fish config.

To reproduce:

• Write a long command until the line wraps
• Insert only 1 character on the new line
• Press backspace
• The last character of the previous line disappears, it reappears after a redraw.

[zanchey]

That change got reworked in 5ece448 - can I ask if you've tried a newer version?

[fratajczak]

Yes, I bisected from the master branch.

[zanchey]

Yes, and I can reproduce (sorry, it was so simple that I should have done that first)

[ridiculousfish]

More fun from the sticky right margin. We can't issue clr_eos if we're "after" the last column since the cursor sticks to it. Fixed as 4116829 - thanks for filing!