[Webkit-unassigned] [Bug 275953] New: [WebKitWebDriver]: Missing Error Information on Capability Parsing Failure

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=275953

            Bug ID: 275953
           Summary: [WebKitWebDriver]: Missing Error Information on
                    Capability Parsing Failure
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: All
                OS: All
            Status: NEW
          Severity: Major
          Priority: P2
         Component: WebDriver
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: pythoncontrol at gmail.com
                CC: bburg at apple.com

Diagnosing this issue took me over 10 hours due to the lack of specific error messages when WebKit WebDriver with GTK fails to parse capabilities. Specifically, the driver failed when provided with a non-empty `browserName` string. Additionally, Selenium does not allow an empty string for the `browserName`, which further complicated the debugging process and consumed a significant amount of time. The generic error messages made it extremely difficult to pinpoint the cause of the failure. To further investigate, I have now entered another rabbit hole by attempting to compile WebKit myself. Here is a link to the relevant lines of code on GitHub where these issues occur: https://github.com/search?q=repo%3AWebKit%2FWebKit%20%22failed%20to%20match%20capabilities%22&type=code. Implementing a debug flag that provides detailed reasons for capability parsing failures would greatly enhance troubleshooting and reduce the time spent resolving such issues.

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