It seems that we don't handle this case for some reason. It would be awesome if we could show the values of bound arguments in addition to the function's source code. I got this error when hovering over a bound function stored in a local: file:///Users/burg/repos/webkit-dev/WebKitBuild/Release/WebInspectorUI.framework/Resources/Views/SourceCodeTextEditor.js:1296:30: CONSOLE ERROR Cannot resolve function details.
<rdar://problem/19281552>