[Python-Dev] FW: Bug? Certainly a new *behavior* from subprocess in 2.5 on Win32

[Delaney, Timothy (Tim)]

Larry Hastings wrote:

> I run the following script:
> --
> from subprocess import *
> Popen("ls -l")
> --
> (yeah, I have ls.exe on Windows)
> 
> Under Python 2.4.2, this simply dumped the results of ls.exe to the
> terminal--sorry, to the "command shell".
> 
> Under Python 2.5, both beta 1 and beta 2, it dumps the results to the
> command shell, but *also* prints this:
> 
> Exception exceptions.AttributeError: "'NoneType' object has no
> attribute 'append'" in <bound method Popen.__del__ of
> <subprocess.Popen object at 0x00C04EB0>> ignored
> 
> Calling Popen() with a stdout = subprocess.PIPE does not throw this
> exception.

I've asked Larry to raise this on SourceForge, but with the SF email
problems I thought I'd better forward it here.

Looks like there's a bug in Popen.__del__ in 2.5. I'm not in a position
to have a look right now.

Tim Delaney