So far the debugger shows only the line of the stack trace for the current selected entry in the stack trace. If you have two or more document views open it would be nice if it would be shown in every editor for every location in the stack trace. So if a function is called from different locations you can easily see from where she is called in a different editor. Otherwise you have go to the debugger and click on the stack trace. Which can be quite slow on windows.

This can be a little bit distracting for recursive functions etc. but different colors can be used for the arrow or a number can indicate the depth of the stack trace.