Cannot read properties of undefined (reading 'fsPath')

[roblourens]

I keep seeing this randomly in the agents app

2026-04-14 10:28:26.036 [error] [Window] Cannot read properties of undefined (reading 'fsPath'): TypeError: Cannot read properties of undefined (reading 'fsPath')
    at aqi (vscode-file://vscode-app/Applications/Visual%20Studio%20Code%20-%20Insiders.app/Contents/Resources/app/out/vs/sessions/sessions.desktop.main.js:4141:16934)
    at vscode-file://vscode-app/Applications/Visual%20Studio%20Code%20-%20Insiders.app/Contents/Resources/app/out/vs/sessions/sessions.desktop.main.js:4141:16769
    at Array.some (<anonymous>)
    at A$ (vscode-file://vscode-app/Applications/Visual%20Studio%20Code%20-%20Insiders.app/Contents/Resources/app/out/vs/sessions/sessions.desktop.main.js:4141:16761)
    at $je._resolveSession (vscode-file://vscode-app/Applications/Visual%20Studio%20Code%20-%20Insiders.app/Contents/Resources/app/out/vs/sessions/sessions.desktop.main.js:4896:27116)
    at WV._runFn (vscode-file://vscode-app/Applications/Visual%20Studio%20Code%20-%20Insiders.app/Contents/Resources/app/out/vs/sessions/sessions.desktop.main.js:4896:26685)
    at WV._run (vscode-file://vscode-app/Applications/Visual%20Studio%20Code%20-%20Insiders.app/Contents/Resources/app/out/vs/sessions/sessions.desktop.main.js:407:6694)
    at new WV (vscode-file://vscode-app/Applications/Visual%20Studio%20Code%20-%20Insiders.app/Contents/Resources/app/out/vs/sessions/sessions.desktop.main.js:407:5832)
    at de (vscode-file://vscode-app/Applications/Visual%20Studio%20Code%20-%20Insiders.app/Contents/Resources/app/out/vs/sessions/sessions.desktop.main.js:407:8931)
    at new $je (vscode-file://vscode-app/Applications/Visual%20Studio%20Code%20-%20Insiders.app/Contents/Resources/app/out/vs/sessions/sessions.desktop.main.js:4896:26660)
    at a._createInstance (vscode-file://vscode-app/Applications/Visual%20Studio%20Code%20-%20Insiders.app/Contents/Resources/app/out/vs/sessions/sessions.desktop.main.js:1466:2000)
    at a.createInstance (vscode-file://vscode-app/Applications/Visual%20Studio%20Code%20-%20Insiders.app/Contents/Resources/app/out/vs/sessions/sessions.desktop.main.js:1466:1440)
    at eCt._instantiateById (vscode-file://vscode-app/Applications/Visual%20Studio%20Code%20-%20Insiders.app/Contents/Resources/app/out/vs/sessions/sessions.desktop.main.js:641:41010)
    at eCt._instantiateSome (vscode-file://vscode-app/Applications/Visual%20Studio%20Code%20-%20Insiders.app/Contents/Resources/app/out/vs/sessions/sessions.desktop.main.js:641:40628)
    at vscode-file://vscode-app/Applications/Visual%20Studio%20Code%20-%20Insiders.app/Contents/Resources/app/out/vs/sessions/sessions.desktop.main.js:641:39937
2026-04-14 10:28:26.036 [error] [Window] Cannot read properties of undefined (reading 'fsPath'): TypeError: Cannot read properties of undefined (reading 'fsPath')
    at aqi (vscode-file://vscode-app/Applications/Visual%20Studio%20Code%20-%20Insiders.app/Contents/Resources/app/out/vs/sessions/sessions.desktop.main.js:4141:16934)
    at vscode-file://vscode-app/Applications/Visual%20Studio%20Code%20-%20Insiders.app/Contents/Resources/app/out/vs/sessions/sessions.desktop.main.js:4141:16769
    at Array.some (<anonymous>)
    at A$ (vscode-file://vscode-app/Applications/Visual%20Studio%20Code%20-%20Insiders.app/Contents/Resources/app/out/vs/sessions/sessions.desktop.main.js:4141:16761)
    at jje._resolveSession (vscode-file://vscode-app/Applications/Visual%20Studio%20Code%20-%20Insiders.app/Contents/Resources/app/out/vs/sessions/sessions.desktop.main.js:4896:30262)
    at new jje (vscode-file://vscode-app/Applications/Visual%20Studio%20Code%20-%20Insiders.app/Contents/Resources/app/out/vs/sessions/sessions.desktop.main.js:4896:30048)
    at a._createInstance (vscode-file://vscode-app/Applications/Visual%20Studio%20Code%20-%20Insiders.app/Contents/Resources/app/out/vs/sessions/sessions.desktop.main.js:1466:2000)
    at a.createInstance (vscode-file://vscode-app/Applications/Visual%20Studio%20Code%20-%20Insiders.app/Contents/Resources/app/out/vs/sessions/sessions.desktop.main.js:1466:1440)
    at eCt._instantiateById (vscode-file://vscode-app/Applications/Visual%20Studio%20Code%20-%20Insiders.app/Contents/Resources/app/out/vs/sessions/sessions.desktop.main.js:641:41010)
    at eCt._instantiateSome (vscode-file://vscode-app/Applications/Visual%20Studio%20Code%20-%20Insiders.app/Contents/Resources/app/out/vs/sessions/sessions.desktop.main.js:641:40628)

[bpasero]

I think this is from here:

vscode/src/vs/sessions/contrib/agentFeedback/browser/agentFeedbackOverviewRulerContribution.ts

Lines 54 to 61 in d87671d

	private _resolveSession(): void {
	const model = this._editor.getModel();
	if (!model) {
	this._sessionResource = undefined;
	return;
	}
	this._sessionResource = getSessionForResource(model.uri, this._chatEditingService, this._sessionsManagementService);
	}

or

vscode/src/vs/sessions/contrib/agentFeedback/browser/agentFeedbackOverviewRulerContribution.ts

Lines 54 to 61 in d87671d

	private _resolveSession(): void {
	const model = this._editor.getModel();
	if (!model) {
	this._sessionResource = undefined;
	return;
	}
	this._sessionResource = getSessionForResource(model.uri, this._chatEditingService, this._sessionsManagementService);
	}