Home/End keys fail with `error when reading terminal`

[kidosatori]

Problem

Elvish prints errors whenever the "Home" and "End" keys are pressed. The respective errors are:

error when reading terminal: bad CSI: "\x1b[7~"
error when reading terminal: bad CSI: "\x1b[8~"

Also, I'm not sure if this is related, but when pressing "Ctrl+LeftArrow" and "Ctrl+RightArrow" I'm getting these errors respectively:

error when reading terminal: bad G3: "\x1bOd"
error when reading terminal: bad G3: "\x1bOc"

Steps to reproduce

1. Start elvish.
2. Press any of the keys previously mentioned, e.g. "Home".

System information

• OS: Artix Linux
• Terminal: rxvt-unicode 9.22-5

~> cat ~/.elvish/rc.elv
use readline-binding

~> go version
go version go1.9.3 linux/amd64

[xiaq]

I will study the escape sequences of urxvt once I can get hand on it.

[kidosatori]

FTR, this issue prompted me to consider switching to a different terminal emulator. Now I'm using the minimalist st (it's not affected by this issue).

Just mentioning it in case you want to put this fix on hold until another rxvt-unicode user shows up, since apparently I was the first one here.

[xiaq]

Most urxvt keys are now supported. \o/