Using the nv driver and an old libXrandr with a server built from git commit ee9bdd3f, running xrandr -s 1 results in a crash in RRCrtcSet because it's called with mode=NULL from ProcRRSetScreenConfig.
Created attachment 7918 [details] Backtrace from the crash
Sorry about the phenomenal bug spam, guys. Adding xorg-team@ to the QA contact so bugs don't get lost in future.
commit 06c3021aec720837bef432656e88ae9b4e35101d Author: Aaron Plattner <aplattner@nvidia.com> Date: Wed Feb 28 16:09:11 2007 -0800 Don't crash setting a NULL mode with a randr classic DDX. Also remember to update the screen size durin g modesets.
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