FSI packaged with 3.0.100-preview3-010431 doesn't recognize System.Uri

[HoraceGonzalez]

While using the dotnet core version of FSI in 3.0 preview 3, the type System.Uri doesn't seem to be recognized by default.

Repro steps

1. run fsi, eg. dotnet fsi.exe

2. execute the following script:

let foo = System.Uri("https://fsharp.org")

Expected behavior

FSI interprets the code without error.

> let foo = System.Uri("https://fsharp.org");;
val foo : System.Uri = https://fsharp.org/

Actual behavior

FSI outputs the following error:

  let foo = System.Uri("");;
  -----------------^^^

/home/stdin(3,18): error FS0039: The value, constructor, namespace or type 'Uri' is not defined.

Known workarounds

I'm not confident this is a proper workaround, but explicitly referencing System.Private.Uri.dll from within FSI seems to at least get rid of the error. Eg.:

#r "System.Private.Uri"

Related information

Here's my dotnet --info:

> dotnet --info                                                                                                                                                               
.NET Core SDK (reflecting any global.json):
 Version:   3.0.100-preview3-010431
 Commit:    d72abce213

Runtime Environment:
 OS Name:     ubuntu
 OS Version:  18.04
 OS Platform: Linux
 RID:         ubuntu.18.04-x64
 Base Path:   /home/tracy/.dotnet/sdk/3.0.100-preview3-010431/

Host (useful for support):
  Version: 3.0.0-preview3-27503-5
  Commit:  3844df9537

.NET Core SDKs installed:
  2.1.300 [/home/tracy/.dotnet/sdk]
  2.1.402 [/home/tracy/.dotnet/sdk]
  2.1.503 [/home/tracy/.dotnet/sdk]
  3.0.100-preview3-010431 [/home/tracy/.dotnet/sdk]

.NET Core runtimes installed:
  Microsoft.AspNetCore.All 2.1.0 [/home/tracy/.dotnet/shared/Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.1.4 [/home/tracy/.dotnet/shared/Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.1.7 [/home/tracy/.dotnet/shared/Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.App 2.1.0 [/home/tracy/.dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.1.4 [/home/tracy/.dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.1.7 [/home/tracy/.dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.0.0-preview3-19153-02 [/home/tracy/.dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 2.1.0 [/home/tracy/.dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.4 [/home/tracy/.dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.1.7 [/home/tracy/.dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.0.0-preview3-27503-5 [/home/tracy/.dotnet/shared/Microsoft.NETCore.App]

To install additional .NET Core runtimes or SDKs:
  https://aka.ms/dotnet-download

PS Made some formatting edits on this comment.

[KevinRansom]

@HoraceGonzalez,

yes there are a few framework types that fsi doesn't currently recognize: this PR: is intended to address that: #6324

However, that PR, has as a side-effect opened up a much worse bug, that I am looking at right now, and will need to fix before I can merge this one.

Kevin

[cartermp]

Closing as dupe of #6215

[KevinRansom]

@HoraceGonzalez, thanks for this report.

[HoraceGonzalez]

Thanks, folks!

[hravnx]

This error is still (again?) present in dotnet core 3.1.101 on macOS 10.15.2. Exact same repro steps as in the original description above.

Output from dotnet --info

NET Core SDK (reflecting any global.json):
 Version:   3.1.101
 Commit:    b377529961

Runtime Environment:
 OS Name:     Mac OS X
 OS Version:  10.15
 OS Platform: Darwin
 RID:         osx.10.15-x64
 Base Path:   /usr/local/share/dotnet/sdk/3.1.101/

Host (useful for support):
  Version: 3.1.1
  Commit:  a1388f194c