Empty array doesn't have max() at max(linenos)

[causalitygroup]

Just a quick note, I had an exception until I edited show_func() to have a guard for max(linenos) like this:

    if len(linenos):
        nlines = max(linenos) - min(min(linenos), start_lineno) + 1
    else:
        nlines = 1

Hope this helps. Great module btw, amazing how short a line profiler can be.

[burnpanck]

Had this issue too, in my case the culprit was a dynamically compiled function (so no source code available). I don't quite see why there are no line numbers for that function either, but probably just because it wasn't called at all...