[Scons-users] weird bug that responds to presence/absence of print statement

[Henry Gomersall]

I've rather a strange problem that I'm trying to understand in debugging 
my tool (https://gist.github.com/hgomersall/6915968#file-jinja-py) 
further to discussions yesterday.

The problem I'm encountering is the simple presence of a print statement 
in the Builder action function allows the tool to work, removing it 
breaks it. (Essentially, I add `str(template_file)` at line 23, where 
template_file is an element in the source arg).

Is there some nefarious effect going on with SCons using the stdout from 
the builder action to do something?

Cheers,

Henry