FSharp.Compiler.Services should tolerate an FSharp.Core without siginfo/optdata in the search path

[sergey-tihon]

fsprojects/ProjectScaffold#46

[ghost]

@sergey-tihon could you add steps for a minimal repro for this?

[sergey-tihon]

I know only one way to reproduce this:

1. Checkout sergey-tihon/FSharp.ProjectScaffold/tree/bug branch.
2. Execute build generatedocs
3. You will get HTML docs without code tips.

The only difference of this branch is that it copies Fsharp.Core.dll into build target directory.
As I understand FSharp.Compiler.Services loads Fsharp.Core.dll from build target which was copied without siginfo/optdata and tips generation works incorrectly.

[ghost]

The version of FSharp.Compiler.Services being used is very old. The problem may still occur, but maybe not. Could you update FSharp.Formatting to 0.0.33, and FSharp.ProjectScaffold to that new version of FSharp.Formatting? fsprojects/FSharp.Formatting#142

[sergey-tihon]

I did it. Bug still occur with latest FSharp.Formatting and FSharp.Compiler.Services.
Please try again (the same link)

[ghost]

This is quite hard to fix without potentially introducing resolution discrepancies between FSharp.Compiler.Service and F# proper.

You can avoid the problem by passing an explicit path reference to FSharp.Core to FSharp.Compiler.Service.

[ghost]

There was a fix for this after all

[sergey-tihon]

Yay! It is really works!
Thank you!