Getting wrong dotnet version

[JCash]

Description:
Our CI has started to fail because we get the new dotnet-10-rc version and not the 9.x version we specify.

Here's how we request the version:

{ name: 'Setup dotnet', uses: actions/setup-dotnet@v4, with: {dotnet-version: '9.x'}},

And here is the actual script that runs:

Run actions/setup-dotnet@v4
  with:
    dotnet-version: 9.x
    cache: false
    ...
/Users/runner/work/_actions/actions/setup-dotnet/v4/externals/install-dotnet.sh --skip-non-versioned-files --runtime dotnet --channel LTS
dotnet-install: Attempting to download using aka.ms link https://builds.dotnet.microsoft.com/dotnet/Runtime/10.0.0-rc.2.25502.107/dotnet-runtime-10.0.0-rc.2.25502.107-osx-arm64.tar.gz
...
/Users/runner/work/_actions/actions/setup-dotnet/v4/externals/install-dotnet.sh --skip-non-versioned-files --channel 9.0
dotnet-install: Attempting to download using aka.ms link https://builds.dotnet.microsoft.com/dotnet/Sdk/9.0.306/dotnet-sdk-9.0.306-osx-arm64.tar.gz

It seems related to #642

When I run dotnet, I clearly expect 9.x, not 10.x?
How am I supposed to get the correct version?

Task version:
Specify the task version

Platform:

• Ubuntu
• macOS
• Windows

Runner type:

• Hosted
• Self-hosted

Repro steps:
Add the action in your workflow:

{ name: 'Setup dotnet', uses: actions/setup-dotnet@v4, with: {dotnet-version: '9.x'}},

Expected behavior:
I expect the version to stay on 9.x.

Actual behavior:
I get dotnet 10 release candidate.

[priyagupta108]

Hello @JCash 👋,
Thank you for your report. We'll investigate the issue and get back to you with the details!