Kmail crashes when typing a recipient email

[Bennett Piater]

On Sunday, October 19, 2025 5:04:57 PM Central European Summer Time you wrote:
> I don't see how my error could be unrelated to wayland, since I can
> reproduce it at will - forcing kmail through xwayland with
> QT_QPA_PLATFORM="xcb" works fine, but running it natively through wayland
> triggers the error.
> 
> I'll happily help debug this, but I have no idea how to continue. I'm not
> used to QT dev and kdepim is huge :D
> If a dev has a hunch which function might be the cause, I can add
> breakpoints there and try to narrow it down. Otherwise, I'm afraid a dev
> trying this in wayland outside of plasma would be the easiest.

Since I have no idea what I'm doing, I gave Claude a shot. I don't know enough 
about QT or wayland, but it does seem like there is a bug somewhere in 
kontacts or qts wayland handling.
Not sure why kwin doesn't trigger it - maybe it validates less strictly than 
sway?

https://claude.ai/share/68dee173-3faf-4dd1-8357-e62d1aedc1fb

What do others think about this? Are any devs reading this list that could 
check if this is plausible?

Cheers,
Bennett