Cannot do anything with `dotnet fsi` in .NET Core 3.1 preview

[cartermp]

On macOS Catalina.

Can't do basic arithmetic:

And pretty much nothing else works either.

[baronfel]

Did a bit of testing on preview two this morning:

• Debian 9 with 3.1.100 preview 2 can execute the above interaction
• Mac OS Mojave with 3.1.100 preview 2 cannot execute the above interaction. I can't even declare simple bindings:

> let m = 10m;;


error FS0193: Could not load file or assembly '"The system type 'System.Runtime.CompilerServices.CompilerGeneratedAttribute' was required but no referenced system DLL contained this type", Culture=neutral, PublicKeyToken=null'. The system cannot find the file specified.

[KevinRansom]

I just installed the most recent builds of 3.1.100-preview2-014569, 3.1.100-Preview3 and 5.0 from the dotnet cli site:
all worked for me on. I will update to catalina, and see how it goes.

MacOS Mojave 10.14.6

Welcome to .NET Core 3.1!
---------------------
SDK Version: 3.1.100-preview2-014569

Telemetry
---------
The .NET Core tools collect usage data in order to help us improve your experience. The data is anonymous. It is collected by Microsoft and shared with the community. You can opt-out of telemetry by setting the DOTNET_CLI_TELEMETRY_OPTOUT environment variable to '1' or 'true' using your favorite shell.

Read more about .NET Core CLI Tools telemetry: https://aka.ms/dotnet-cli-telemetry

----------------
Explore documentation: https://aka.ms/dotnet-docs
Report issues and find source on GitHub: https://github.com/dotnet/core
Find out what's new: https://aka.ms/dotnet-whats-new
Learn about the installed HTTPS developer cert: https://aka.ms/aspnet-core-https
Use 'dotnet --help' to see available commands or visit: https://aka.ms/dotnet-cli-docs
Write your first app: https://aka.ms/first-net-core-app
--------------------------------------------------------------------------------------

Microsoft (R) F# Interactive version 10.7.0.0 for F# 4.7
Copyright (c) Microsoft Corporation. All Rights Reserved.

For help type #help;;

> 2+2;;
val it : int = 4

> 

Kevins-MBP:~/temp/xps>dotnet fsi

Welcome to .NET Core 3.1!
---------------------
SDK Version: 3.1.100-preview3-014639

Telemetry
---------
The .NET Core tools collect usage data in order to help us improve your experience. The data is anonymous. It is collected by Microsoft and shared with the community. You can opt-out of telemetry by setting the DOTNET_CLI_TELEMETRY_OPTOUT environment variable to '1' or 'true' using your favorite shell.

Read more about .NET Core CLI Tools telemetry: https://aka.ms/dotnet-cli-telemetry

----------------
Explore documentation: https://aka.ms/dotnet-docs
Report issues and find source on GitHub: https://github.com/dotnet/core
Find out what's new: https://aka.ms/dotnet-whats-new
Learn about the installed HTTPS developer cert: https://aka.ms/aspnet-core-https
Use 'dotnet --help' to see available commands or visit: https://aka.ms/dotnet-cli-docs
Write your first app: https://aka.ms/first-net-core-app
--------------------------------------------------------------------------------------

Microsoft (R) F# Interactive version 10.7.0.0 for F# 4.7
Copyright (c) Microsoft Corporation. All Rights Reserved.

For help type #help;;

> 2+2;;
val it : int = 4

> cc

and ...

Kevins-MBP:~/temp/xps>dotnet fsi

Welcome to .NET Core 5.0!
---------------------
SDK Version: 5.0.100-alpha1-015580

Telemetry
---------
The .NET Core tools collect usage data in order to help us improve your experience. The data is anonymous. It is collected by Microsoft and shared with the community. You can opt-out of telemetry by setting the DOTNET_CLI_TELEMETRY_OPTOUT environment variable to '1' or 'true' using your favorite shell.

Read more about .NET Core CLI Tools telemetry: https://aka.ms/dotnet-cli-telemetry

----------------
Installed an ASP.NET Core HTTPS development certificate.
To trust the certificate run 'dotnet dev-certs https --trust' (Windows and macOS only).
Learn about HTTPS: https://aka.ms/dotnet-https
----------------
Write your first app: https://aka.ms/dotnet-hello-world
Find out what's new: https://aka.ms/dotnet-whats-new
Explore documentation: https://aka.ms/dotnet-docs
Report issues and find source on GitHub: https://github.com/dotnet/core
Use 'dotnet --help' to see available commands or visit: https://aka.ms/dotnet-cli
--------------------------------------------------------------------------------------

Microsoft (R) F# Interactive version 10.7.0.0 for F# 4.7
Copyright (c) Microsoft Corporation. All Rights Reserved.

For help type #help;;

> Failed to install ctrl-c handler - Ctrl-C handling will not be available. Error was:
	Could not load file or assembly 'Mono.Posix, Version=2.0.0.0, Culture=neutral, PublicKeyToken=0738eb9f132ed756'. The system cannot find the file specified.
- 2+2;;
val it : int = 4

> 

[KevinRansom]

With Catalina

Last login: Mon Nov  4 20:16:30 on console

The default interactive shell is now zsh.
To update your account to use zsh, please run `chsh -s /bin/zsh`.
For more details, please visit https://support.apple.com/kb/HT208050.
Kevins-MBP:~ kevinr$ dotnet fsi
-bash: dotnet: command not found
Kevins-MBP:~ kevinr$ dotnet fsi

Microsoft (R) F# Interactive version 10.7.0.0 for F# 4.7
Copyright (c) Microsoft Corporation. All Rights Reserved.

For help type #help;;

> 2+2;;
val it : int = 4

> 

[KevinRansom]

@cartermp , if this still fails on your macbook, could I take a look please mate.

[eiriktsarpalis]

Related to #7369

I'm seeing this on and off with preview builds in all platforms. Probably not fsharp related, similar errors are popping up in omnisharp.

[cartermp]

@KevinRansom this reproduces with the latest .NET Core 3 preview:

[KevinRansom]

@cartermp I left my MacBook at home, I can try when I get home, if you are going to be in today, could I look at it on your macbook?

thanks

Kevin

[cartermp]

I'm not in the office today still due to illness. These are my OS specs:

[KevinRansom]

Still works for me
@cartermp , I am going to need to look at your machine, see if I can figure out whats up.
System Software Overview:

  System Version:	macOS 10.15.1 (19B88)
  Kernel Version:	Darwin 19.0.0
  Boot Volume:	MacBook HD
  Boot Mode:	Normal
  Computer Name:	Kevin’s MacBook Pro
  User Name:	Kevin Ransom (kevinr)
  Secure Virtual Memory:	Enabled
  System Integrity Protection:	Enabled
  Time since boot:	9 days 20:41

Kevins-MBP:kevinransom kevinr$ dotnet

Usage: dotnet [options]
Usage: dotnet [path-to-application]

Options:
  -h|--help         Display help.
  --info            Display .NET Core information.
  --list-sdks       Display the installed SDKs.
  --list-runtimes   Display the installed runtimes.

path-to-application:
  The path to an application .dll file to execute.
Kevins-MBP:kevinransom kevinr$ dotnet --info
.NET Core SDK (reflecting any global.json):
 Version:   3.1.100-preview3-014639
 Commit:    c46588ae63

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/3.1.100-preview3-014639/

Host (useful for support):
  Version: 3.1.0-preview3.19553.2
  Commit:  13f35c3d86

.NET Core SDKs installed:
  3.1.100-preview3-014639 [/usr/local/share/dotnet/sdk]

.NET Core runtimes installed:
  Microsoft.AspNetCore.App 3.1.0-preview3.19554.4 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 3.1.0-preview3.19553.2 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

To install additional .NET Core runtimes or SDKs:
  https://aka.ms/dotnet-download
Kevins-MBP:kevinransom kevinr$ dotnet fsi

Microsoft (R) F# Interactive version 10.7.0.0 for F# 4.7
Copyright (c) Microsoft Corporation. All Rights Reserved.

For help type #help;;

> 2+2;;
val it : int = 4

> 

[abelbraaksma]

@KevinRansom, just to note, the two versions of the preview are not identical. @cartermp uses 014645 and you:

Version: 3.1.100-preview3-014639

Considering that the bug comes and goes, reprodibililty may have to do with that.

[KevinRansom]

For the sceptics among us here it is working on:
.NET Core SDKs installed:
3.1.100-preview3-014645 [/usr/local/share/dotnet/sdk

I am going to need to check it out on a machine that fails, to discover what the environment issues are.

Kevins-MBP:~ kevinr$ dotnet --info
.NET Core SDK (reflecting any global.json):
 Version:   3.1.100-preview3-014645
 Commit:    b32d27f4b3

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/3.1.100-preview3-014645/

Host (useful for support):
  Version: 3.1.0-preview3.19553.2
  Commit:  13f35c3d86

.NET Core SDKs installed:
  3.1.100-preview3-014645 [/usr/local/share/dotnet/sdk]

.NET Core runtimes installed:
  Microsoft.AspNetCore.App 3.1.0-preview3.19555.2 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 3.1.0-preview3.19553.2 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

To install additional .NET Core runtimes or SDKs:
  https://aka.ms/dotnet-download
Kevins-MBP:~ kevinr$  dotnet fsi

Welcome to .NET Core 3.1!
---------------------
SDK Version: 3.1.100-preview3-014645

Telemetry
---------
The .NET Core tools collect usage data in order to help us improve your experience. The data is anonymous. It is collected by Microsoft and shared with the community. You can opt-out of telemetry by setting the DOTNET_CLI_TELEMETRY_OPTOUT environment variable to '1' or 'true' using your favorite shell.

Read more about .NET Core CLI Tools telemetry: https://aka.ms/dotnet-cli-telemetry

----------------
Explore documentation: https://aka.ms/dotnet-docs
Report issues and find source on GitHub: https://github.com/dotnet/core
Find out what's new: https://aka.ms/dotnet-whats-new
Learn about the installed HTTPS developer cert: https://aka.ms/aspnet-core-https
Use 'dotnet --help' to see available commands or visit: https://aka.ms/dotnet-cli-docs
Write your first app: https://aka.ms/first-net-core-app
--------------------------------------------------------------------------------------

Microsoft (R) F# Interactive version 10.7.0.0 for F# 4.7
Copyright (c) Microsoft Corporation. All Rights Reserved.

For help type #help;;

> 2+2;;
val it : int = 4

>