Operation Canceled in VSCode Extension Host Process

[felixhaeberle]

Description

An error occurred indicating an operation was canceled within the Visual Studio Code extension host process. This cancellation appears to be unhandled and has been reported as an error. The issue was encountered in the context of extension operations, potentially involving GitHub Copilot Chat extension activities.

Error Details

• Type: Canceled
• Message: Canceled
• Location: Various locations within extensionHostProcess.js and specific extension files (github.copilot-chat-0.11.1/dist/extension.js).
• Handled: No

Stack Trace

• The error originates from multiple points within the extension host process and GitHub Copilot Chat extension, indicating a broad impact on extension operations due to the cancellation.
• Specific locations include instantiation and operational methods within extensionHostProcess.js and various operations within the GitHub Copilot Chat extension.

Potential Issue

The cancellation error suggests an asynchronous operation initiated by the extension(s) was terminated prematurely. This could result from user action, internal logic conditions not being met, or other extensions interfering with normal operations.

Steps to Reproduce

1. Run Visual Studio Code on macOS 14.0 with the GitHub Copilot Chat extension version 0.11.1 installed.
2. Engage in activities that involve extension host processes, such as initiating Copilot sessions or other extension-related operations.
3. The cancellation error may manifest under conditions where operations are interrupted or cannot complete as expected.

Expected Behavior

Operations within the VSCode extension host, especially involving extensions like GitHub Copilot Chat, should complete successfully or handle cancellations gracefully without resulting in unhandled errors.

Actual Behavior

An operation was canceled within the extension host process, leading to an unhandled error that could potentially disrupt user workflow or extension functionality.

Suggested Fix

• Investigate the specific operations leading to cancellations, identifying if they stem from user actions, extension conflicts, or internal logic errors.
• Implement more robust error handling around asynchronous operations, ensuring that cancellations are anticipated and managed without escalating to unhandled errors.
• Review and, if necessary, update the GitHub Copilot Chat extension and other related extensions to ensure their compatibility and stability within the extension host environment, particularly focusing on asynchronous task management.

Environment

• Node Version: v18.15.0
• macOS Version: 14.0
• Architecture: arm64
• Environment: production
• Error Level: error
• Error Mechanism: onunhandledrejection
• OS: macOS 14.0
• Runtime: Node v18.15.0

[ross-chipstack]

I'm seeing this any time I run > Developer: Reload Window

[OfekShilon]

I suspect this originates in the last line here: https://github.com/microsoft/vscode/blob/3e8b60f276587a4d2a4d24b8d81729c3a9c9373e/src/vs/platform/clipboard/browser/clipboardService.ts#L43-L61

We're seeing lots of similar errors in compiler-explorer (utilizing monaco-editor), when users browse from Safari.

The cancel call is:

    cancel() {
        return this.error(new CancellationError());
    }

AFAICT this isn't part of anything async, so maybe the intention was to throw and not return this CancellationError? But I really don't know what I'm talking about and don't have a macOS to try and debug this.

@jrieken Maybe you can help?