[Webkit-unassigned] [Bug 104854] New: Web Inspector: Show which exception causes break on exception.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=104854

           Summary: Web Inspector: Show which exception causes break on
                    exception.
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: All
        OS/Version: All
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Web Inspector
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: johnjbarton at chromium.org
                CC: keishi at webkit.org, pmuellr at yahoo.com,
                    pfeldman at chromium.org, yurys at chromium.org,
                    apavlov at chromium.org, loislo at chromium.org,
                    vsevik at chromium.org,
                    web-inspector-bugs at googlegroups.com


The current user experience for break on exception is puzzling: the debugger stops on the line of the error, but gives no information about the error message other than a cryptic <exception> property in Local on the Scope Variables.  If you continue, then you get the error message in the UI, but its too late your not paused any more!

Rather than this code in ScopeChainSideBar.js:

var details = WebInspector.debuggerModel.debuggerPausedDetails();
                        var exception = details.reason === WebInspector.DebuggerModel.BreakReason.Exception ? details.auxData : 0;
                        if (exception) {
                            extraProperties = extraProperties || [];
                            var exceptionObject = /** @type {RuntimeAgent.RemoteObject} */ (exception);
                            extraProperties.push(new WebInspector.RemoteObjectProperty("<exception>", WebInspector.RemoteObject.fromPayload(exceptionObject)));
                        }

a better solution would put the same information in to the red insert for error messages.

The red insert could be removed on resume to let the console put it copy up.

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