vscode: Extensions stop working after some time: MaxListenersExceededWarning

Issue Type: Bug

1. Open VS Code
2. Work on a project for a few hours (the time it takes for this bug to occur is not consistent). 2.a. Some extra information: my workspace contains *.vue, *.md, *.js, *.css, *.md files, and a single web.xml file. Executing “Reload Window” from the Command Pallette fixes the issue, temporarily, then it will happen again after a few more hours.

Console output in VS Code developer tools console:

INFO no standard startup: not a new window
/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.main.js:276 [Extension Host] Git extension API method 'getGitPath' is deprecated.
t.log @ /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.main.js:276
/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.main.js:276 [Extension Host] Sync : Connected with user : 'mrjones2014'
6/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.main.js:1411   ERR Cannot read property 'peekBack' of undefined: TypeError: Cannot read property 'peekBack' of undefined
	at IndentSpy._peekBack (/Users/mat/.vscode/extensions/sirtori.indenticator-0.6.0/out/src/extension.js:250:28)
	at IndentSpy._buildHoverString (/Users/mat/.vscode/extensions/sirtori.indenticator-0.6.0/out/src/extension.js:234:35)
	at IndentSpy._buildHoverprovider (/Users/mat/.vscode/extensions/sirtori.indenticator-0.6.0/out/src/extension.js:215:28)
	at Object.provideHover (/Users/mat/.vscode/extensions/sirtori.indenticator-0.6.0/out/src/extension.js:205:29)
	at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:749:178
	at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:108:466
	at new n.Class.derive._oncancel (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:86:460)
	at Object.t.asWinJsPromise (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:108:431)
	at e.provideHover (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:749:132)
	at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:763:824
	at e._withAdapter (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:761:91)
	at e.$provideHover (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:763:786)
	at e._doInvokeHandler (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:681:309)
	at e._invokeHandler (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:681:27)
	at e._receiveRequest (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:679:802)
	at e._receiveOneMessage (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:678:993)
	at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:677:791
	at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:98:597
	at e.fire (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:99:917)
	at a (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:164:787)
	at Socket._socketDataListener (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:164:1006)
	at emitOne (events.js:116:13)
	at Socket.emit (events.js:211:7)
	at addChunk (_stream_readable.js:263:12)
	at readableAddChunk (_stream_readable.js:250:11)
	at Socket.Readable.push (_stream_readable.js:208:10)
	at Pipe.onread (net.js:594:20)
t.log @ /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.main.js:276
t.log @ /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.main.js:276
t.log @ /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.main.js:276
/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.main.js:1411   ERR Cannot read property 'peekBack' of undefined: TypeError: Cannot read property 'peekBack' of undefined
	at IndentSpy._peekBack (/Users/mat/.vscode/extensions/sirtori.indenticator-0.6.0/out/src/extension.js:250:28)
	at IndentSpy._buildHoverString (/Users/mat/.vscode/extensions/sirtori.indenticator-0.6.0/out/src/extension.js:234:35)
	at IndentSpy._buildHoverprovider (/Users/mat/.vscode/extensions/sirtori.indenticator-0.6.0/out/src/extension.js:215:28)
	at Object.provideHover (/Users/mat/.vscode/extensions/sirtori.indenticator-0.6.0/out/src/extension.js:205:29)
	at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:749:178
	at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:108:466
	at new n.Class.derive._oncancel (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:86:460)
	at Object.t.asWinJsPromise (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:108:431)
	at e.provideHover (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:749:132)
	at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:763:824
	at e._withAdapter (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:761:91)
	at e.$provideHover (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:763:786)
	at e._doInvokeHandler (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:681:309)
	at e._invokeHandler (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:681:27)
	at e._receiveRequest (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:679:802)
	at e._receiveOneMessage (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:678:993)
	at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:677:791
	at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:98:597
	at e.fire (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:99:917)
	at a (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:164:787)
	at Socket._socketDataListener (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:164:1006)
	at emitOne (events.js:116:13)
	at Socket.emit (events.js:211:7)
	at addChunk (_stream_readable.js:263:12)
	at readableAddChunk (_stream_readable.js:250:11)
	at Socket.Readable.push (_stream_readable.js:208:10)
	at Pipe.onread (net.js:594:20)
/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.main.js:276 [IPC Library: Search] (node:48600) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 exit listeners added. Use emitter.setMaxListeners() to increase limit
t.log @ /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.main.js:276
3/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.main.js:1411   ERR Cannot read property 'peekBack' of undefined: TypeError: Cannot read property 'peekBack' of undefined
	at IndentSpy._peekBack (/Users/mat/.vscode/extensions/sirtori.indenticator-0.6.0/out/src/extension.js:250:28)
	at IndentSpy._buildHoverString (/Users/mat/.vscode/extensions/sirtori.indenticator-0.6.0/out/src/extension.js:234:35)
	at IndentSpy._buildHoverprovider (/Users/mat/.vscode/extensions/sirtori.indenticator-0.6.0/out/src/extension.js:215:28)
	at Object.provideHover (/Users/mat/.vscode/extensions/sirtori.indenticator-0.6.0/out/src/extension.js:205:29)
	at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:749:178
	at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:108:466
	at new n.Class.derive._oncancel (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:86:460)
	at Object.t.asWinJsPromise (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:108:431)
	at e.provideHover (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:749:132)
	at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:763:824
	at e._withAdapter (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:761:91)
	at e.$provideHover (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:763:786)
	at e._doInvokeHandler (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:681:309)
	at e._invokeHandler (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:681:27)
	at e._receiveRequest (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:679:802)
	at e._receiveOneMessage (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:678:993)
	at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:677:791
	at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:98:597
	at e.fire (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:99:917)
	at a (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:164:787)
	at Socket._socketDataListener (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:164:1006)
	at emitOne (events.js:116:13)
	at Socket.emit (events.js:211:7)
	at addChunk (_stream_readable.js:263:12)
	at readableAddChunk (_stream_readable.js:250:11)
	at Socket.Readable.push (_stream_readable.js:208:10)
	at Pipe.onread (net.js:594:20)
2/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.main.js:276 [IPC Library: Search] (node:48600) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 exit listeners added. Use emitter.setMaxListeners() to increase limit
t.log @ /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.main.js:276
/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.main.js:1411   ERR Cannot read property 'peekBack' of undefined: TypeError: Cannot read property 'peekBack' of undefined
	at IndentSpy._peekBack (/Users/mat/.vscode/extensions/sirtori.indenticator-0.6.0/out/src/extension.js:250:28)
	at IndentSpy._buildHoverString (/Users/mat/.vscode/extensions/sirtori.indenticator-0.6.0/out/src/extension.js:234:35)
	at IndentSpy._buildHoverprovider (/Users/mat/.vscode/extensions/sirtori.indenticator-0.6.0/out/src/extension.js:215:28)
	at Object.provideHover (/Users/mat/.vscode/extensions/sirtori.indenticator-0.6.0/out/src/extension.js:205:29)
	at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:749:178
	at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:108:466
	at new n.Class.derive._oncancel (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:86:460)
	at Object.t.asWinJsPromise (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:108:431)
	at e.provideHover (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:749:132)
	at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:763:824
	at e._withAdapter (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:761:91)
	at e.$provideHover (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:763:786)
	at e._doInvokeHandler (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:681:309)
	at e._invokeHandler (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:681:27)
	at e._receiveRequest (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:679:802)
	at e._receiveOneMessage (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:678:993)
	at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:677:791
	at /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:98:597
	at e.fire (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:99:917)
	at a (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:164:787)
	at Socket._socketDataListener (/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/node/extensionHostProcess.js:164:1006)
	at emitOne (events.js:116:13)
	at Socket.emit (events.js:211:7)
	at addChunk (_stream_readable.js:263:12)
	at readableAddChunk (_stream_readable.js:250:11)
	at Socket.Readable.push (_stream_readable.js:208:10)
	at Pipe.onread (net.js:594:20)
/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.main.js:276 [IPC Library: Search] (node:48600) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 exit listeners added. Use emitter.setMaxListeners() to increase limit
t.log @ /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.main.js:276
t.log @ /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.main.js:276
t.log @ /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.main.js:276
4/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.main.js:276 [IPC Library: Search] (node:48600) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 exit listeners added. Use emitter.setMaxListeners() to increase limit
t.log @ /Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.main.js:276
2/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.main.js:1411  WARN Aborted onWillSaveTextDocument-event after 1750ms
console.ts:136 [IPC Library: Search] (node:48600) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 exit listeners added. Use emitter.setMaxListeners() to increase limit
t.log @ console.ts:136
(anonymous) @ ipc.cp.ts:200
e.fire @ event.ts:140
i @ event.ts:588
emitTwo @ events.js:126
emit @ events.js:214
emit @ internal/child_process.js:772
_combinedTickCallback @ internal/process/next_tick.js:141
_tickCallback @ internal/process/next_tick.js:180

VS Code version: Code 1.27.2 (f46c4c469d6e6d8c46f268d1553c5dc4b475840f, 2018-09-12T07:04:11.329Z) OS version: Darwin x64 18.0.0

System Info

Item	Value
CPUs	Intel® Core™ i7-4870HQ CPU @ 2.50GHz (8 x 2500)
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, 3, 3
Memory (System)	16.00GB (0.13GB free)
Process Argv	/Applications/Visual Studio Code.app/Contents/MacOS/Electron /Users/mat/MyWorkspace.code-workspace
Screen Reader	no
VM	0%

Extensions (12)

Extension	Author (truncated)	Version
vscode-color	ans	0.4.5
bracket-pair-colorizer	Coe	1.0.60
vue-peek	dar	1.0.2
gitlens	eam	8.5.6
vsc-material-theme	Equ	2.4.2
auto-close-tag	for	0.5.6
auto-rename-tag	for	0.0.15
vscode-firefox-debug	hbe	1.7.0
debugger-for-chrome	msj	4.10.2
vetur	oct	0.13.0
code-settings-sync	Sha	3.1.2
indenticator	Sir	0.6.0