Analyse following RPM build log snippet. Describe contents accurately, without speculation or suggestions for resolution.            
Your analysis must be as concise as possible, while keeping relevant information intact.
Snippet: 
File "/usr/lib/python3.13/site-packages/specfile/spec_parser.py", line 235, in get_rpm_spec
    raise RPMException(stderr=stderr) from e
specfile.exceptions.RPMException: line 42: Unclosed %if
This is the exception from the specfile Python library, which parses the specfile.