Describes a reproduced host SIGSEGV in cuGraphicsMapResources (inside
libnvidia-eglcore), reached via zerocopy::cuda / zerocopy::egl on the tiled
EGL/GL->CUDA capture path, when the KWin dmabuf is invalidated mid-map (observed
on .181 during a Game->Desktop switch under zero-copy, with the compositor itself
crashing). Pre-existing capture-layer issue, not the gamemode work. Issue
description + root cause + solution-space considerations only -- the next agent
plans the implementation.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
