Burst 1.8.15 Constant Crash on Compile

Unity Engine
,
1

Update to latest burst 1.8.15 and turning burst compilation on just crashes 100% while recompiling in my project

Repro rate 7/7 (100%) just going to Burst → Enable Compilation
Unity 6000.0.3f1
Deleting burst cache does not help
-edit- full Library deletion and reimport doesn’t help

Stacks from logs

and

2

IN-76518

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3

Thanks, will take a look.

4

Well it seems like Unity 6000.0.4 bumped min burst version to 1.8.15 so I’m now blocked from upgrading Unity (unless I throw a copy of burst 1.8.14 in the /Packages folder I guess)

5

I just encountered both errors last night (which I will refer to as Error1 and Error2 respectively) across two of my projects. However, my steps for triggering them and how I resolved them are a bit different. So I will document here what happened in case it sheds additional light on the problem to help track down this issue.

I started off in ProjectA, where at some point I disabled Burst compilation to iterate on some code a bit faster. After iterating for a while, I re-enabled Burst and encountered Error1. Notably, this was on Unity 6000.0.3f1 and Burst 1.8.13. I restarted the editor and encountered the same crash on startup. I reported this as IN-77476

While I was waiting for that bug to upload, I decided to try and upgrade Project B from 6000.0.2f1 to 6000.0.3f1. This was also using Burst 1.8.13. Doing so resulted in Error2 upon immediately opening up the project. Reported as IN-77478

Once ProjectA’s report was submitted, I wiped out the Library cache and temp folders completely and reopened the project, and I encountered Error2 this time. I did the same for Project B with the same result.

I then installed Unity 6000.0.4f1, and opened Project A in it, which inherently updated Burst to 1.8.15. This opened successfully, and I was able to test my iterations in Burst. I did the same for ProjectB.

So far, Unity 6000.0.3f1 seems to be the real culprit for me, but I might just need more time experimenting to encounter more issues.

I hope this info proves to be helpful! Best of luck tracking this one down!

6

Hi. Any new update?

7

Apologies, the issue turned out to be slightly trickier than we expected. We are preparing a 1.8.16 to correct the issues introduced in 1.8.15. If nothing else is encountered a new 1.8.16 should be available shortly, (end of week)

2 Likes
8

Hi, Burst 1.8.16, which contains the fix for this issue, has been released & is accessible through the Package Manager.

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