dotnet fsi crashes with lines longer than terminal width

[greggyb]

dotnet fsi crashes with lines longer than terminal width

[greggyb]

With more experimentation, it appears that this is specific to readline-enabled interpreters. Disabling readline with $ dotnet fsi --readline- seems to eliminate the error.

[vzarytovskii]

What's the version of sdk in use?

[greggyb]

Ubuntu:

$ dotnet --version
8.0.105

FreeBSD:

$ dotnet --version
8.0.100

[greggyb]

Extra context:
Right now, due to a confluence of how FSAC and editors interact, working around this with the --readline- option has pretty negative knock-on effects for interactive programming with Ionide plugins.

• Editor plugin interactions: ionide/Ionide-vim#82
• FSAC issues with CLI options: ionide/FsAutoComplete#1210

A fix for the latter (FSAC issues with CLI options) will make the situation much more tenable for interactive development. Personally, I hope to get that PR raised tonight, as this is impacting my productivity.

After that fix, I think the situation will be much less severe. It certainly won't be a major concern for me, as the vast majority (99%) of my interactive use is sending lines from an editor to the interpreter via Ionide.

[bmitc]

This isn't to say that "it works on my machine" but rather to give further debug data point that this indeed seems specific to the terminal being used. On Windows 11 and Windows Terminal, FSI handles long lines. For example:

PowerShell 7.4.2
Loading personal and system profiles took 1605ms.
> dotnet fsi

Microsoft (R) F# Interactive version 12.8.200.0 for F# 8.0
Copyright (c) Microsoft Corporation. All Rights Reserved.

For help type #help;;

> printfn "This is a very long sentence which I will type to overflow the boundary of the terminal and yield the error
 that I am talking about in this bug report. No holding down a key for me! System.PlatformNotSupportedException: Opera
tion is not supported on this platform.asdflkajsfdaoiwejfoawjefoaijwefljawlkefjlakwjfelkajwveoijaoifjeoawjfeawljlvkjaw
kljfoeiawjfeoiawjfoejawoefjoajwfeioajwfeljaklvjelkajfeoaijwfeoiawjefoij";;
This is a very long sentence which I will type to overflow the boundary of the terminal and yield the error that I am talking about in this bug report. No holding down a key for me! System.PlatformNotSupportedException: Operation is not supported on this platform.asdflkajsfdaoiwejfoawjefoaijwefljawlkefjlakwjfelkajwveoijaoifjeoawjfeawljlvkjawkljfoeiawjfeoiawjfoejawoefjoajwfeioajwfeljaklvjelkajfeoaijwfeoiawjefoij
val it: unit = ()

Versions:

> dotnet fsi --version
Microsoft (R) F# Interactive version 12.8.200.0 for F# 8.0

> dotnet --version
8.0.204

Hopefully that's helpful.