Tomas Grosup

@gusty : Can I please ask for your help for correctly reproducing and verifying this? ```fsharp // Picking 1.6.1. to make sure it has been built with older SDK #r...

THanks for the steps, @gusty . I have created the repro with the mentioned `global.json`, `dotnet --version` in that folder states `8.0.412`. I then tried to reproduce the issue by...

`F# Interactive version 12.9.101.0 for F# 9.0` has not been updated, is it possible this is a very early .NET 9 SDK (or Visual Studio from that time) which did...

Or, if there is a specific version of F#+ that already has this problem, then I could `#r "nuget:` that version - I could then make it part of our...

Thanks, it would help for sure. An .fsx with a `#r "nuget:.."` reference to F#+ would work great, as it is something we can also keep around as a regression...

I just tested it on latest preview. Without having any further clue, the code is fully generic with `'a` having the `null` constraint. As soon as type is inferred from...

If I use the real `System.Environment.GetEnvironmentVariable`, `x` also becomes full `String` instead of `string|null` after the null handling case.

I am happy to assist if you are interested into pursueing this. The VSTest@3 did work with some minor bugs - e.g. I had the feeling that parametrized tests were...

I think this is a bug in the operator typechecking, we did have a few more reported recently when it comes to chaining of operators on the same line. Note...

I looked into this, I had no idea this was ever supported. The RFC FS-1053 https://github.com/fsharp/fslang-design/blob/main/FSharp-4.5/FS-1053-span.md uses the term "struct types" when mentioning features like `IsByRefLike` support. All the examples...