portal2
                                
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                        `mat_wireframe 1` crashes the game
What happens
Loading any map, enabling sv_cheats 1 and setting mat_wireframe 1 crashes the game.
What was expected
Wireframe mode enables normally as in other Source titles.
Environment
Tested on multiple Linux installs, where the crash is easily reproduced:
| CPU | GPU | Distro | DE | Notes | 
|---|---|---|---|---|
| Ryzen 7 5800X | Radeon RX 6700 | Void Linux | KDE (kwin X11) 5.25.3 | |
| Ryzen 7 5800X | Radeon RX 6700 | Void Linux | KDE (kwin X11) 5.25.3 | -vulkan | 
| Ryzen 7 4700U | RX Vega 7 (iGPU) | Void Linux | KDE (kwin X11) 5.25.3 | |
| Ryzen 7 4700U | RX Vega 7 (iGPU) | Void Linux | KDE (kwin X11) 5.25.3 | -vulkan | 
| i5 3317U | HD4000/IVB (iGPU) | Arch Linux | XFCE (xfwm4 X11) 4.16.1 | |
| i5 3317U | HD4000/IVB (iGPU) | Arch Linux | XFCE (xfwm4 X11) 4.16.1 | -vulkan | 
| i5 7600K | GTX 1060 | Arch Linux | KDE (kwin Wayland) 5.25.3 | Ran through prime-run | 
Steam Portal 2 public branch version 9166234.