settings.json throws validation errors in latest insiders

[smlombardi]

Issue Type: Bug

After las tinsiders update, status bar displays and error. Clicking the error shows

{
	"resource": "/0/settings.json",
	"owner": "_generated_diagnostic_collection_name_#0",
	"code": "513",
	"severity": 8,
	"message": "Property expected",
	"source": "jsonc",
	"startLineNumber": 673,
	"startColumn": 1,
	"endLineNumber": 673,
	"endColumn": 2
}

VS Code version: Code - Insiders 1.26.0-insider (e8b1ee0, 2018-07-26T05:12:05.252Z)
OS version: Darwin x64 17.7.0

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz (8 x 2800)
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)	2, 2, 2
Memory (System)	16.00GB (1.12GB free)
Process Argv	/Users/st016lo/Applications/Visual Studio Code - Insiders.app/Contents/MacOS/Electron
Screen Reader	no
VM	0%

Extensions (26)

Extension	Author (truncated)	Version
better-comments	aar	1.2.6
Bookmarks	ale	9.0.2
project-manager	ale	8.0.0
bracket-pair-colorizer	Coe	1.0.59
vscode-eslint	dba	1.4.12
tslint	eg2	1.0.34
vscode-great-icons	emm	2.1.37
prettier-vscode	esb	1.5.0
auto-rename-tag	for	0.0.15
path-autocomplete	ion	1.12.0
svg	joc	0.1.1
Angular2	joh	6.1.1
ecdc	mit	0.12.0
HTMLHint	mka	0.5.0
theme-monokai-pro-vscode	mon	1.1.8
vscode-scss	mrm	0.6.2
vscode-stylefmt	mrm	2.5.0
angular2-inline	nat	0.0.17
incrementor	nms	0.1.0
vscode-versionlens	pfl	0.21.1
quicktype	qui	12.0.5
code-settings-sync	Sha	3.0.0
stylelint	shi	0.38.1
rewrap	stk	1.9.1
sort-lines	Tyr	1.7.0
change-case	wma	1.0.0

(4 theme extensions excluded)

[smlombardi]

This one, also:

{
	"resource": "/0/settings.json",
	"owner": "_generated_diagnostic_collection_name_#0",
	"code": "513",
	"severity": 8,
	"message": "Property expected",
	"source": "jsonc",
	"startLineNumber": 2746,
	"startColumn": 1,
	"endLineNumber": 2746,
	"endColumn": 2
}

[acrixl]

same error for build from master

[kieferrm]

Was fixed with dae69db.