Hello all,

I have updated my computer to Fedora 22 and gem5 stopped compiling. The error 
that I get when I want to compile is:

$ scons build/X86/gem5.opt
scons: Reading SConscript files ...
AttributeError: 'NoneType' object has no attribute 'group':
  File "./gem5/SConstruct", line 605:
    if not as_version or compareVersions(as_version[-1], "2.23") < 0:
  File "./gem5/src/python/m5/util/__init__.py", line 120:
    v1 = make_version_list(v1)
  File "./gem5/src/python/m5/util/__init__.py", line 116:
    return map(lambda x: int(re.match('\d+', x).group()), v.split('.'))
  File "./gem5/src/python/m5/util/__init__.py", line 116:
    return map(lambda x: int(re.match('\d+', x).group()), v.split('.'))

My Python version is 2.10.7, my scons version is 2.3.4 and my gcc version is 
5.1.1. I have tried with different SConstruct versions and still not compiling, 
any idea? I know what the error means but I do not understand why I get it, 
since it works in other linux enviroments. (My repo 
https://github.com/markoshorro/gem5/)

Regards

-- 
Marcos Horro Varela,
BSc student
University of A Coruña
http://markos-horro.com
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