Error in references breaks subsequent hovers

[Desentso]

• Sourcegraph version: Sourcegraph.com
• Platform information: Windows 10, Chrome 70.0.3538.77

Steps to reproduce:

1. Open any C file on sourcegraph.com (I could only reproduce with C)
2. Hover over any function
3. Click "Find references"

Expected behavior:

It should show the correct references.
After that the hover features should work normally.

Actual behavior:

References tab says "No local references found", even though there is local references on the same file
Console throws error:

An error occurred when sending LSP requests to the language server, disabling this instance of the language extension (reload the page to clear this state).  
Error: method not found at sourcegraph.commands.executeCommand.then.responses

After this all hovering features stop working.

[sqs]

We will be temporarily removing C support as it does not work well enough. Sorry you encountered these problems.

There is a separate issue you raised, too: a references error causes subsequent hovers to not work. Assigned to @chrismwendt or @sqs and retitled issue.

[chrismwendt]

The separate issue about errors preventing subsequent hovers from working was fixed in sourcegraph/sourcegraph-langserver-http#9