Andi Vajda wrote:
On Fri, 13 Mar 2009, Michael McCandless wrote:
OK it's great that I can .printStackTrace() to see it...
But shouldn't we override JavaError.__str__ so by default an
unhandled exception originating from Java would reveal its Java
trace as well? (And presumably vice/versa).
Does that actually work or does it require some deeper messing with
Python so that the exception reporting explores the actual Java
exception and continues reporting the stacktrace ?
Good question -- I'm really not sure what's the best way to implement
it.
I think on exception we should try to provide as much info as
possible to aid in debugging. Sometimes, it's a user who sees this
exception, copies it into email and sends it off to you for remote
debugging.
Oh, in theory, I completely agree with you. Last time I looked at
implementing this it wasn't trivial. Maybe, I missed the obvious ?
Even if overriding __str__ thus worked here, Java is not making it
trivial to get a stacktrace as a String (you have to have
PrintWriter and StringWriter available to you). Similarly, the JNI
ExceptionDescribe() C++ function prints to stderr, it doesn't give
you a string.
So, what needs to be done instead is bend Python to do the right
thing when reporting the stacktrace of the JavaError python
exception and that looked non-trivial last time I looked into it.
Yeah it does not sound easy. I'll at least open an issue for it...
this certainly shouldn't block 2.4.1.
Mike
