IronPython and Traceback line numbers in Mono (workaround)

One of the reasons why I need to have access to a Windows dev environment when doing my IronPython/Mono development is the lack of line numbers in IronPython tracebacks under Mono. But via Seo Sanghyeon comes a workround. He has discovered that that Mono can't display line numbers from AssemblyBuilder built in memory, but only from Assembly loaded from disk. So you need run mono in debug mode and get IronPython to compile and save the assemblies to disk. So if we have a buggy script like:

a = 1
b = 0
c = a/b

Prior to the workround the traceback would have been:

Traceback (most recent call last):
  File foo, line unknown, in Initialize
ZeroDivisionError: Division by zero

But if I start IronPython using:

mono --debug ipy.exe -X:SaveAssemblies foo.py

you get a more helpful traceback

Traceback (most recent call last):
  File /u1/ip/IPCE/IPCE-svn/Lib/site.py, line 33, in Initialize
  File /u1/ip/IPCE/IPCE-svn/Lib/fepy/__init__.py, line 7, in install
  File /u1/ip/IPCE/IPCE-svn/Lib/fepy/__init__.py, line 11, in install_option
  File /u1/ip/IPCE/IPCE-svn/Lib/fepy/ast.py, line 17, in Initialize
SystemError: Object reference not set to an instance of an object
Traceback (most recent call last):
  File /tmp/foo.py, line 3, in Initialize
ZeroDivisionError: Division by zero

Thanks again Sangyheon.