Compiler version downgraded to 4.8.0

[petro2050]

Description

I recently started seeing this error with ubuntu-latest:

CSC : error CS9057: The analyzer assembly '/home/runner/.nuget/packages/amazon.jsii.analyzers/1.106.0/analyzers/dotnet/cs/Amazon.JSII.Analyzers.dll' references version '4.12.0.0' of the compiler, which is newer than the currently running version '4.8.0.0'.

On 22.04, the version seems to be 4.11.0.0. I was hoping the new one would have version 4.12. Seems like it's worse now.

Platforms affected

• Azure DevOps
• GitHub Actions - Standard Runners
• GitHub Actions - Larger Runners

Runner images affected

• Ubuntu 20.04
• Ubuntu 22.04
• Ubuntu 24.04
• macOS 12
• macOS 13
• macOS 13 Arm64
• macOS 14
• macOS 14 Arm64
• macOS 15
• macOS 15 Arm64
• Windows Server 2019
• Windows Server 2022
• Windows Server 2025

Image version and build link

Ubuntu 24.04

Is it regression?

Yes

Expected behavior

An older version of the compiler is shown.

Actual behavior

The compiler version should be updated.

Repro steps

Deploy a .net 8 application with the provided Nuget package.