Cannot read property 'isFullScreen' of null

[chrmarti]

Issue Type: Bug

ERR Cannot read property 'isFullScreen' of null: TypeError: Cannot read property 'isFullScreen' of null
at C.isFullScreen (/Applications/Visual Studio Code - Insiders.app/Contents/Resources/app/out/vs/code/electron-main/main.js:444:954)
at Screen. (/Applications/Visual Studio Code - Insiders.app/Contents/Resources/app/out/vs/code/electron-main/main.js:438:18)
at emitThree (events.js:141:20)
at Screen.emit (events.js:217:7)

VS Code version: Code - Insiders 1.29.0-insider (5438af1, 2018-11-07T00:54:27.213Z)
OS version: Darwin x64 17.7.0

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-4770HQ CPU @ 2.20GHz (8 x 2200)
GPU Status	2d_canvas: enabled checker_imaging: disabled_off flash_3d: enabled flash_stage3d: enabled flash_stage3d_baseline: enabled gpu_compositing: enabled multiple_raster_threads: enabled_on native_gpu_memory_buffers: enabled rasterization: enabled video_decode: enabled video_encode: enabled webgl: enabled webgl2: enabled
Load (avg)	3, 4, 4
Memory (System)	16.00GB (0.89GB free)
Process Argv	-psn_0_5215481
Screen Reader	no
VM	33%

Extensions (28)

Extension	Author (truncated)	Version
unique-lines	bib	1.0.0
ssh	chr	0.0.4
vscode-eslint	dba	1.7.0
Spot	der	0.4.0
ghlink	dt	1.0.2
remotehub	eam	0.2.0
EditorConfig	Edi	0.12.5
tslint	eg2	1.0.40
git-project-manager	fel	1.7.1
vscode-pull-request-github	Git	0.2.3
rest-client	hum	0.20.3
solidity	Jua	0.0.46
theme-karyfoundation-themes	kar	18.2.1
graphql-for-vscode	kum	1.12.1
vscode-azureappservice	ms-	0.9.1
vscode-azurefunctions	ms-	0.12.0
vscode-cosmosdb	ms-	0.8.0
azure-account	ms-	0.6.0
azurecli	ms-	0.4.2
github-issues-prs	ms-	0.9.1
vsliveshare	ms-	0.3.925
debugger-for-chrome	msj	4.11.0
vscode-docker	Pet	0.3.1
vscode-versionlens	pfl	0.22.0
vscode-workspacecontains-canary	rob	0.0.2
vscode-open-in-github	sys	1.8.0
ayu	tea	0.16.0
azure-iot-toolkit	vsc	1.6.0

[isidorn]

I could add a null check and simply go over this. However forwarding to @bpasero since this might uncover some flaw in his logic

[vscodebot]

We closed this issue because we are unable to reproduce the problem with the steps you describe. Chances are we've already fixed your problem in a recent version of VS Code. If not, please ask us to reopen the issue and provide us with more detail. Our issue reporting guidelines might help you with that.

Happy Coding!

[bpasero]

This was a global listener not being cleaned up when the window closes 👍