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: 
signals.c:329:17: error: ‘return’ with no value, in function returning non-void [-Wreturn-mismatch]
  329 |                 return;
      |                 ^~~~~~
detailed description of issue