[BCUS98114] Gran Turismo 5 v1.04 - Crash with "Unimplemented BEM class instruction" at countdown "1" on Grand Valley Speedway

[redeto]

Quick summary

Gran Turismo 5 [BCUS98114] v1.04 consistently crashes at the exact same
moment during the race start countdown, always at "1", on one specific
race. 100% reproducible.

Details

Event: A-Spec > Beginner Series > Japanese Classics > 3rd race
Track: Grand Valley Speedway
Weather: Clear
Car: Mitsubishi Galant GTO MR '70 (in-game car list)The emulator terminates with:
"Unimplemented BEM class instruction"
(FPOpcodes.cpp:150, get_operand_count)

Steps to reproduce

1. Start A-Spec > Japanese Classics event, 3rd race (Grand Valley Speedway)
2. Wait for the start countdown to reach "1"
3. Emulator crashes every time at this exact point

RPCS3 Version: v0.0.42-19897-44a2e4d6 Alpha | master
GPU: NVIDIA GeForce RTX 3070
Renderer: Vulkan
Driver: 596.49.0.0
OS: Windows 10, Build 26200

Log attached: RPCS3.log

Note: Similar "Unimplemented BEM class instruction" crashes were
reported/fixed for Uncharted 3 and Killzone 2 in #17891 / #18416,
but this appears to be a different trigger pattern on Grand Valley
Speedway.

Attach a log file

crash_excerpt.txt

Attach capture files for visual issues

No response

System configuration

No response

Other details

No response

[emissary935]

Seems to be tied to the "Resolution Scale" slider, I had it on 200% and resetting the option made it work again.

[redeto]

Can confirm, same fix worked for me too. Thanks!

Seems to be tied to the "Resolution Scale" slider, I had it on 200% and resetting the option made it work again.

[visnants]

Seems to be tied to the "Resolution Scale" slider, I had it on 200% and resetting the option made it work again.

Can confirm. Races for me only work at 100% res scale. And this issue seems to be in every race, not just on Grand Valley Speedway.

[Satan86]

This crash is fixed when enabling the "Disable Blit Engine Upscaling" setting in the Debug Tab of Settings, so it's a regression from #19343 which enabled Blit Engine Upscaling by default. It is reproducible in more than the specific race mentioned as well, it crashes immediately upon you start driving.

[kd-11]

Hmm, so we're upscaling shader code somehow. Interesting finding.

[rubidragoon]

I was having the same crashing at the beginning of any race until I found this issue and the "Disable Blit Engine Upscaling" setting which totally fixed!!! Thanks 🙏