[Wayland-bugs] [Bug 100947] The xxxx_set_user_data() API cause client data corrupted in listener callbacks

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100947

--- Comment #2 from Pekka Paalanen <ppaalanen at gmail.com> ---
Hi,

I suppose this is the common mistake: *_add_listener() sets the same user_data
member as *_set_user_data(). It's not exactly underlined in the docs, but it is
there: https://wayland.freedesktop.org/docs/html/apb.html#Client-classwl__proxy
for wl_proxy_add_listener() and wl_proxy_set_user_data().

The compositor has nothing to do with this. If you call *_set_user_data(), you
will overwrite the value set by *_add_listener().

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