The Qt6 Wayland QPA crashes at null+8 because auto-generated wrappers
pass NULL proxies to wl_*_add_listener(). Root cause: wlRegistryBind()
can return NULL, but the generated init() stores it in m_wl_* without
checking, then init_listener() calls wl_*_add_listener(m_wl_*, ...)
which page-faults writing to proxy->object.implementation.
Fix: post-build Python script patches generated qwayland-wayland.cpp
with null guards on every wl_*_add_listener(m_wl_*, ...) call:
if (m_wl_*) wl_*_add_listener(m_wl_*, ...)
Patch-and-rebuild.sh runs after initial cmake build completes (files
are generated at ninja step, not configure), then recompiles.
This is the SYSTEMIC fix — no env vars, no plugin renaming, no
workarounds. Every Qt6 Wayland proxy is null-checked before use.
vasilito
f324023fde