Enabling preview features causes an issue with main somehow. #16572
Description
While working on the accessibility PR, I wanted to add a new CI leg to test out the visibility stuff.
And this command line failed ... when I tried it out on main it also failed.
eng\CIBuild.cmd -testCompilerComponentTests -configuration Release /p:FSharpLangVersion=preview
...
Results File: C:\microsoft\fsharp\artifacts\TestResults\Release\FSharp.Compiler.ComponentTests_net8.0.xml
Test Run Failed.
Total tests: 3314
Passed: 3105
Failed: 6
Skipped: 203
Total time: 9.9728 Minutes
Results file zipped:
FSharp.Compiler.ComponentTests_net8.0.zip