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: 
+ /usr/bin/patch -p1 -s --fuzz=0 --no-backup-if-mismatch -f
2 out of 2 hunks FAILED -- saving rejects to file lib/thumbnailprovider/thumbnailgenerator.cpp.rej

There the build failed