Issue Description

I am observing a crash of the Preview extension every time I hover over a block of code (inside a Pester test script) that is highlighted as a Problem (due to a test failure during the past run). As soon as I hover over, I can see a brief appearance of a little tool-tip showing the name of the failed test and a tiny message saying No quick fixes available and once it disappears, I receive a notification about termination of the PowerShell session.

Attached Logs

Diagnostics logs will be uploaded over an email.

Environment Information

Visual Studio Code

Name	Version
Operating System	Windows_NT x64 10.0.17763
VSCode	1.37.0
PowerShell Extension Version	2019.5.0

PowerShell Information

Name	Value
PSVersion	5.1.17763.503
PSEdition	Desktop
PSCompatibleVersions	1.0 2.0 3.0 4.0 5.0 5.1.17763.503
BuildVersion	10.0.17763.503
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
azure-account	ms-vscode	0.8.4
azure-pipelines	ms-azure-devops	1.155.0
beautify	HookyQR	1.5.0
code-settings-sync	Shan	3.4.1
code-spell-checker	streetsidesoftware	1.7.17
csharp	ms-vscode	1.21.0
docs-article-templates	docsmsft	0.2.7
docs-authoring-pack	docsmsft	0.1.2
docs-markdown	docsmsft	0.2.13
docs-preview	docsmsft	0.3.25
docs-yaml	docsmsft	0.2.3
ecdc	mitchdenny	1.3.0
EditorConfig	EditorConfig	0.13.0
gc-excelviewer	GrapeCity	2.1.32
gitlens	eamodio	9.9.3
live-html-previewer	hdg	0.3.0
mssql	ms-mssql	1.6.0
partial-diff	ryu1kn	1.4.0
pomodoro-code	odonno	0.2.1
powershell-preview	ms-vscode	2019.5.0
team	ms-vsts	1.149.2
theme-hackershaze	Nuuf	2.0.1
todo-tree	Gruntfuggly	0.0.140
vscode-hexdump	slevesque	1.7.2
vscode-logicapps	ms-azuretools	0.2.9
vscode-markdownlint	DavidAnson	0.30.1
vscode-yaml	redhat	0.4.1
xml	DotJoshJohnson	2.5.0