Unity Issue Tracker - [Metal] [iOS] Application crashes on BufferMetal::SetData when multithreaded rendering is on

Fixed in 2021.2.X

Duplicate in 2019.4.X

Votes

1

Found in

2019.4

2020.2

2021.1

2021.1.0b1

2021.2

Issue ID

1303935

Regression

No

[Metal] [iOS] Application crashes on BufferMetal::SetData when multithreaded rendering is on

Metal

Jan 06, 2021

Reproduction steps:
1. Open project in "case_1274547-minimum.zip"
2. Build the project for iOS and deploy it to a device
3. Wait

Actual result: the project crashes at launch or after some time (usually takes less than 20 seconds)

Reproducible with: 2019.4.29f1, 2020.3.13f1, 2021.1.14f1, 2021.2.0a17
Not reproducible wih: 2021.2.0a18 (Fix version), 2022.1.0a1
Could not test with 2018.4.31f1 (precompiled assembly exception)

Devices tested:
Reproducible with:
VLNQA00310 iPad Pro 12.9 1st gen (iOS 13.4.1)
iPhone 8+ (iOS 12.0)
iPhone XR (iOS 13.4.1)
iPad Air 2 (iOS 11.0.3)
iPad 9.7 6th gen (iOS 14.0b7)
Not reproducible with:
iPhone 11 (iOS 13.7)
iPhone 11 (iOS 14.3)
Apple TV 4th gen (tvOS 14)
iPhone SE 2nd gen (iOS 14.0.1)

Few lines from trace:
* thread #29, name = 'UnityGfxDeviceWorker', stop reason = EXC_BAD_ACCESS (code=1, address=0x18)
* frame #0: 0x0000000105dbb278 UnityFramework`BufferMetal::SetData(void const*, unsigned long, unsigned long) + 60
frame #1: 0x0000000105dca660 UnityFramework`GfxDeviceMetal::SetComputeBufferData(GfxBuffer*, void const*, unsigned long, unsigned long) + 40
...

Resolution Note (fix version 2021.2):

Fixed in 2021.2.0a18

Comments (2)

NHN_Fujisawa

Apr 28, 2022 01:54

I want to know when this solution will be implemented in 2019.4.x.
meryemekinci

Sep 24, 2021 18:55

I am having the same issue with 2020.3.10.

There is no 2021.2.X version on Unity Download page. Which fixed version is available on the download page?

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