Suggestions for parameter types not working

[PrzemyslawKlys]

Issue Description

I am experiencing a problem with... suggestions for parameter types not working.

In code:

This used to work. It's not working in production and preview. It's very useful in ISE.

Attached Logs

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Environment Information

Visual Studio Code

Name	Version
Operating System	Windows_NT x64 10.0.19041
VSCode	1.45.1
PowerShell Extension Version	2020.6.0

PowerShell Information

Name	Value
PSVersion	5.1.19041.1
PSEdition	Desktop
PSCompatibleVersions	1.0 2.0 3.0 4.0 5.0 5.1.19041.1
BuildVersion	10.0.19041.1
CLRVersion	4.0.30319.42000
WSManStackVersion	3.0
PSRemotingProtocolVersion	2.3
SerializationVersion	1.1.0.1

Visual Studio Code Extensions

Visual Studio Code Extensions(Click to Expand)

Extension	Author	Version
bracket-pair-colorizer-2	CoenraadS	0.1.4
code-settings-sync	Shan	3.4.3
github-linker	gimenete	0.2.3
gitlens	eamodio	10.2.1
grammarly	znck	0.12.1
markdown-all-in-one	yzhang	3.0.0
material-icon-theme	PKief	4.1.0
powershell-preview	ms-vscode	2020.6.0
project-manager	alefragnani	11.0.1
vscode-markdownlint	DavidAnson	0.36.0
vscode-pull-request-github	GitHub	0.16.0
vscode-toggle-quotes	BriteSnow	0.3.2
vscode-wakatime	WakaTime	4.0.0
xml	DotJoshJohnson	2.5.0

[SeeminglyScience]

Works for me.

Windows PowerShell is really finicky with it's type completion because it didn't account for the fact that type discovery sometimes throws (like JIT and assembly resolution errors). Next time you see it try this directly in the console:

TabExpansion2 -inputScript ($s = '[IDictionary') -cursorColumn $s.Length

If that throws, there's a good chance that an assembly was loaded in the current session that type discovery doesn't handle well. Especially if you have an older version of .NET framework then pretty much any netstandard targeting assembly will cause it.

[PrzemyslawKlys]

I can replicate it every single time.

[PrzemyslawKlys]

Same machine in ISE doesn't have a problem. Not sure if that helps:

[SeeminglyScience]

After you get that error can you run this pls:

$e = $Error[0].Exception
while ($e -and $null -eq $e.LoaderExceptions) {
    $e = $e.InnerException
}

$e.LoaderExceptions | fl * -for

[PrzemyslawKlys]

Message        : Method 'get_Line' in type 'EditorServicesCommandSuite.EditorServices.LspPosition' from assembly 'EditorServicesCommandSuite.EditorServices, Vers
                 ion=1.0.0.0, Culture=neutral, PublicKeyToken=null' does not have an implementation.
TypeName       : EditorServicesCommandSuite.EditorServices.LspPosition
Data           : {}
InnerException :
TargetSite     :
StackTrace     :
HelpLink       :
Source         :
HResult        : -2146233054

[PrzemyslawKlys]

After I've removed module from loading - it works.

[SeeminglyScience]

Yep that's a JIT time exception for sure. FWIW that won't affect completion in PS7 since the type completion API now catches those exceptions during type discovery.

@TylerLeonhardt You know if there's any more breaking changes coming in the near future? (I know we've already discussed this one in particular, just trying to see if I should expect more shortly).

[PrzemyslawKlys]

Thank you @SeeminglyScience, appreciate your help!