Debug cannot read property 'onError' of undefined

Issue Description

Insiders only (works fine in Stable): every time I try to start a debug session (either press F5, or use the Start Debug command), regardless of the debug type I select (Interactive Sessions, or Current File etc…) I always get the error in the screenshot. I can reproduce with all extensions disabled (except Powershell of course), I tried to clean my C:\Users\carloc.vscode-insiders\extensions folder (basically reinstall the extensions from scratch) but the problem remains.

I use Code Insiders as my primary editor, I think I got this error the first time towards the end of last week but I don’t have exact dates to confirm

Attached Logs

1540311154-1018dcff-3bc2-424c-a3bf-83841bbc9be21540311145453.zip

Environment Information

Visual Studio Code

Name	Version
Operating System	Windows_NT x64 10.0.17763
VSCode	1.29.0-insider
PowerShell Extension Version	1.9.0

PowerShell Information

Name	Value
PSVersion	5.1.17763.1
PSEdition	Desktop
PSCompatibleVersions	1.0 2.0 3.0 4.0 5.0 5.1.17763.1
BuildVersion	10.0.17763.1
CLRVersion	4.0.30319.42000
WSManStackVersion	3.0
PSRemotingProtocolVersion	2.3
SerializationVersion	1.1.0.1

launch.json

{
    // Use IntelliSense to learn about possible attributes.
    // Hover to view descriptions of existing attributes.
    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
    "version": "0.2.0",
    "configurations": [{
            "type": "PowerShell",
            "request": "launch",
            "name": "PowerShell Launch Current File",
            "script": "${file}",
            "args": [],
            "cwd": "${file}"
        },
        {
            "type": "PowerShell",
            "request": "launch",
            "name": "PowerShell Launch Current File in Temporary Console",
            "script": "${file}",
            "args": [],
            "cwd": "${file}",
            "createTemporaryIntegratedConsole": true
        },
        {
            "type": "PowerShell",
            "request": "launch",
            "name": "PowerShell Launch Current File w/Args Prompt",
            "script": "${file}",
            "args": [
                "${command:SpecifyScriptArgs}"
            ],
            "cwd": "${file}"
        },
        {
            "type": "PowerShell",
            "request": "attach",
            "name": "PowerShell Attach to Host Process",
            "processId": "${command:PickPSHostProcess}",
            "runspaceId": 1
        },
        {
            "type": "PowerShell",
            "request": "launch",
            "name": "PowerShell Interactive Session",
            "cwd": ""
        }
    ]
}

Visual Studio Code Extensions

Visual Studio Code Extensions(Click to Expand)

Extension	Author	Version
arm-snippets	samcogan	1.3.7
atom-material-theme	tobiasalthoff	1.5.0
auto-close-tag	formulahendry	0.5.6
auto-rename-tag	formulahendry	0.0.15
azure-account	ms-vscode	0.4.3
azurecli	ms-vscode	0.4.2
azurerm-vscode-tools	msazurermtools	0.4.2
beautify	HookyQR	1.4.6
better-align	wwm	1.1.6
Bookmarks	alefragnani	9.1.0
bracket-pair-colorizer	CoenraadS	1.0.60
change-case	wmaurer	1.0.0
code-runner	formulahendry	0.9.4
code-settings-sync	Shan	3.2.0
code-spell-checker	streetsidesoftware	1.6.10
copy-text	salbert	0.4.1
csharp	ms-vscode	1.16.2
csharpextensions	jchannon	1.3.0
csharpfixformat	Leopotam	0.0.76
cursor-tools	naumovs	2.0.0
debugger-for-chrome	msjsdiag	4.10.2
docomment	k–kato	0.1.2
emoji-code	idleberg	0.7.2
extension-manifest-editor	ms-devlabs	0.1.5
file-icons	file-icons	1.0.16
filter-line	everettjf	1.1.0
gc-excelviewer	GrapeCity	2.1.26
gitignore	codezombiech	0.5.0
gitlens	eamodio	8.5.6
highlight-bad-chars	wengerk	0.0.3
highlight-matching-tag	vincaslt	0.6.2
highlight-words	rsbondi	0.0.8
hogwarts-colors-dark	CarloCardella	0.7.0
indent4to2	Compulim	0.1.2
JavaScriptSnippets	xabikos	1.7.1
json-escaper	joshuapoehls	1.1.0
linux-themes	SolarLiner	1.0.1
LiveServer	ritwickdey	5.1.1
LogFileHighlighter	emilast	2.4.2
markdown-all-in-one	yzhang	1.6.2
markdown-table-prettify	darkriszty	2.2.0
material-icon-theme	PKief	3.6.0
Material-theme	zhuangtongfa	2.17.4
metago	metaseed	2.11.0
mssql	ms-mssql	1.4.0
new-moon-vscode	taniarascia	1.4.11
notification-tester	svipben	2.0.1
one-monokai	azemoh	0.3.7
open-in-browser	techer	2.0.0
partial-diff	ryu1kn	1.4.0
path-intellisense	christian-kohler	1.4.2
PowerShell	ms-vscode	1.9.0
preview-vscode	searKing	1.4.4
python	ms-python	2018.9.1
rainbow-csv	mechatroner	0.7.1
reg	ionutvmi	0.0.2
seito-openfile	Fr43nk	1.8.1
selectline-statusbar	tomoki1207	0.0.2
seti-icons	qinjia	0.1.3
shell-launcher	Tyriar	0.2.0
sort-lines	Tyriar	1.7.0
string-converter	adamwalzer	0.1.1
sublime-commands	Zarel	0.1.0
supersharp	craigthomas	0.1.4
TabOut	albert	0.1.6
team	ms-vsts	1.142.0
text-marker	ryu1kn	1.9.0
text-power-tools	qcz	1.2.1
theme-dracula	dracula-theme	2.14.1
Theme-TomorrowKit	ms-vscode	0.1.4
transformer	dakara	1.6.0
tslint	eg2	1.0.40
txt-syntax	xshrim	0.0.3
typescript-hero	rbbit	3.0.0
vsc-material-theme	Equinusocio	2.4.2
vscode-csharp-snippets	jorgeserrano	0.3.1
vscode-eslint	dbaeumer	1.6.1
vscode-fileutils	sleistner	2.11.0
vscode-format-context-menu	lacroixdavid1	1.0.4
vscode-great-icons	emmanuelbeziat	2.1.44
vscode-guid	heaths	1.4.0
vscode-highlight	fabiospampinato	1.3.0
vscode-icons	robertohuertasm	7.27.0
vscode-insertdatestring	jsynowiec	2.2.3
vscode-markdownlint	DavidAnson	0.20.0
vscode-path-tools	cg-cnu	0.0.4
vscode-pull-request-github	GitHub	0.2.1
vscode-random	jrebocho	1.3.2
vscode-simple-icons	LaurentTreguier	1.8.7
vscode-simpler-icons	davidbabel	1.6.5
vscode-smart-column-indenter	lmcarreiro	0.0.13
vscode-theme-onedark	akamud	2.1.0
vscode-theme-onelight	akamud	2.1.0
vscode-todo-plus	fabiospampinato	4.9.2
vscodeintellicode	VisualStudioExptTeam	1.0.5
vsliveshare	ms-vsliveshare	0.3.834
vsliveshare-audio	ms-vsliveshare	0.1.39
wrapSelection	konstantin	0.6.8
xml	DotJoshJohnson	2.3.2

[jaroslavcervenka]

I had the same error. Debugger started to work when extension VS Live Share has been disabled and VS code reloaded.

[fbehrens]

I have experienced this issue in vscode 1.30.2.

In insiders it is fixed.