The editor as an issue with nullable arrays. (C# 8.0 Nullable Ref Types)

Issue Description

The editor as an issue with nullable arrays. So, if I type up something like the following:

byte[]? buffer = null;

The syntax highlighting breaks. The IntelliSense however still works fine.

Steps to Reproduce

If I type up something like the following:

byte[]? buffer = null;

The syntax highlighting breaks.

Environment information

VSCode version: 1.41.0-insider C# Extension: 1.21.7

Mono Information

OmniSharp using global mono :6.4.0

Dotnet Information

.NET Core SDK (reflecting any global.json): Version: 3.0.100 Commit: 04339c3a26

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/3.0.100/

Host (useful for support): Version: 3.0.0 Commit: 7d57652f33

.NET Core SDKs installed: 2.1.301 [/usr/local/share/dotnet/sdk] 2.1.302 [/usr/local/share/dotnet/sdk] 2.1.401 [/usr/local/share/dotnet/sdk] 2.1.402 [/usr/local/share/dotnet/sdk] 2.1.403 [/usr/local/share/dotnet/sdk] 2.1.500 [/usr/local/share/dotnet/sdk] 2.1.505 [/usr/local/share/dotnet/sdk] 2.2.101 [/usr/local/share/dotnet/sdk] 2.2.102 [/usr/local/share/dotnet/sdk] 2.2.105 [/usr/local/share/dotnet/sdk] 2.2.300 [/usr/local/share/dotnet/sdk] 2.2.401 [/usr/local/share/dotnet/sdk] 2.2.402 [/usr/local/share/dotnet/sdk] 3.0.100 [/usr/local/share/dotnet/sdk]

.NET Core runtimes installed: Microsoft.AspNetCore.All 2.1.1 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.1.2 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.1.3 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.1.4 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.1.5 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.1.6 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.1.9 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.2.0 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.2.1 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.2.3 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.2.5 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.2.6 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All] Microsoft.AspNetCore.All 2.2.7 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.All] Microsoft.AspNetCore.App 2.1.1 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.1.2 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.1.3 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.1.4 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.1.5 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.1.6 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.1.9 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.2.0-preview2-35157 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.2.0 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.2.1 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.2.3 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.2.5 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.2.6 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 2.2.7 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.0.0-preview5-19227-01 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.0.0-preview6.19307.2 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.0.0-preview8.19405.7 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.0.0-preview9.19424.4 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.0.0-rc1.19457.4 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.AspNetCore.App 3.0.0 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App] Microsoft.NETCore.App 2.1.1 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.2 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.3 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.4 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.5 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.6 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.9 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 2.1.13 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 2.2.0-preview2-26905-02 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 2.2.0 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 2.2.1 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 2.2.3 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 2.2.5 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 2.2.6 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 2.2.7 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 3.0.0-preview5-27626-15 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 3.0.0-preview6-27804-01 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 3.0.0-preview9-19423-09 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 3.0.0-rc1-19456-20 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App] Microsoft.NETCore.App 3.0.0 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

To install additional .NET Core runtimes or SDKs: https://aka.ms/dotnet-download

Visual Studio Code Extensions

Extension	Author	Version
aspnet-helper	schneiderpat	0.6.4
auto-close-tag	formulahendry	0.5.6
auto-using	Fudge	0.7.9
azure-account	ms-vscode	0.8.7
azure-iot-toolkit	vsciot-vscode	2.13.0
azure-pipelines	ms-azure-devops	1.157.4
azurecli	ms-vscode	0.4.6
azurerm-vscode-tools	msazurermtools	0.8.2
beautify	HookyQR	1.5.0
better-comments	aaron-bond	2.0.5
bracket-pair-colorizer	CoenraadS	1.0.61
cake-vscode	cake-build	0.12.0
classynaming	reflectiondm	1.2.0
code-settings-sync	Shan	3.4.3
comments	AlexCoderCorp	1.0.4
csharp	ms-vscode	1.21.7
csharpextensions	jchannon	1.3.1
darkpp-italic	idbartosz	0.1.3
docomment	k–kato	0.1.8
dotnet	formulahendry	0.0.4
dotnet-core-commands	matijarmk	1.0.6
dotnet-test-explorer	formulahendry	0.7.1
easy-icons	jamesmaj	0.3.1
EditorConfig	EditorConfig	0.14.2
git-project-manager	felipecaputo	1.7.1
githd	huizhou	2.1.0
githistory	donjayamanne	0.4.6
gitlens	eamodio	10.1.2
graphql-for-vscode	kumar-harsh	1.15.3
highlight-trailing-white-spaces	ybaumes	0.0.2
markdown-all-in-one	yzhang	2.5.1
markdown-pdf	yzane	1.4.1
markdown-preview-github-styles	bierner	0.1.6
markdown-shortcuts	mdickin	0.12.0
material-icon-theme	PKief	3.9.1
Material-theme	zhuangtongfa	2.28.3
mono-debug	ms-vscode	0.15.8
monokai-vibrant	s3gf4ult	0.5.0
msbuild-project-tools	tintoy	0.3.2
mssql	ms-mssql	1.7.0
mustache	dawhite	1.1.1
net-core-starters-pack	blairleduc	1.0.0
one-monokai	azemoh	0.4.4
powershell	ms-vscode	2019.11.0
prettier-vscode	esbenp	3.5.0
quicktype	quicktype	12.0.46
rest-client	humao	0.22.2
sublime-babel-vscode	joshpeng	0.2.10
supersharp	craigthomas	0.1.4
theme-material-dark-soda	jbw91	1.3.1
theme-monokai-pro-vscode	monokai	1.1.14
todo-tree	Gruntfuggly	0.0.162
vsc-material-theme	Equinusocio	30.0.0
vscode-aks-tools	ms-kubernetes-tools	0.0.1
vscode-apimanagement	ms-azuretools	0.1.1
vscode-azureappservice	ms-azuretools	0.16.1
vscode-azurefunctions	ms-azuretools	0.20.0
vscode-azurestorage	ms-azuretools	0.7.2
vscode-cosmosdb	ms-azuretools	0.11.0
vscode-coverage-gutters	ryanluker	2.4.2
vscode-csharp-snippets	jorgeserrano	0.3.1
vscode-docker	ms-azuretools	0.8.2
vscode-dotnet-auto-attach	DennisMaxJung	1.1.0
vscode-great-icons	emmanuelbeziat	2.1.47
vscode-icons	vscode-icons-team	9.5.0
vscode-kubernetes-tools	ms-kubernetes-tools	1.0.7
vscode-markdownlint	DavidAnson	0.32.0
vscode-node-azure-pack	ms-vscode	0.0.10
vscode-quick-select	dbankier	0.2.8
vscode-sequence-diagrams	AleksandarDev	0.3.1
vscode-versionlens	pflannery	0.24.0
vscode-yaml	redhat	0.5.3
vscodeilviewer	josephwoodward	0.0.1
vsliveshare	ms-vsliveshare	1.0.1123
xml	DotJoshJohnson	2.5.0

[filipw]

it has shipped. please enable semantic highlighting (instructions here https://github.com/OmniSharp/omnisharp-vscode/releases/tag/v1.21.19-beta)

[michaelstaib]

There are two settings for this …

"editor.semanticHighlighting.enabled": true,
"csharp.semanticHighlighting.enabled": true,

after setting both everything worked fine… but only after omnisharp had fully loaded the project.

also, I am on the insider only.