2326873 - An internal Error "dflib/dfo.cxx:1978" and "Parallel Combiner" occurred due to a specific query.

An IQ Internal Error "dflib/dfo.cxx:1978" and "Parallel Combiner" occurred due to a specific query.
   
    **       Non-Fatal IQ Internal Error Detected
    **       at dflib/dfo.cxx:1978  on thread 139969934755584 (TID 432)
    **       with Query_Name: 001_repro
    **       Error detected at DFO #398 Parallel Combiner  
           
    [ Stacktrace & Error message ]
  
     df_Exception::df_Exception
     df_Exception::ThrowException
     dfo::ConstructWorkAllocatorInternal
     dfo::ConstructWorkAllocator
     dfo_Combiner::SourcePreFetch
     dfo_Combiner::FetchOpus
     dfjo_Hash::Fetch_T2_IntoHash
     dfjo_Hash::FirstFetch
     dfjo_Hash::FetchOpus
     dfjo_Hash::ExecWork
     workAllocator::DoWork
     ...
     **       End of stack trace from Non-Fatal IQ Internal Error dflib/dfo.cxx:1978
     ...
     Exception Thrown from dflib/dfo.cxx:1978, Err# 0, tid 432 origtid 432
        O/S Err#: 0, ErrID: 9216 (df_Exception); SQLCode: -1006001, SQLState: 'QBA01', Severity: 23
     [20239]: IQ Internal error. Please report this to SAP IQ support.
     -- (dflib/dfo.cxx 1978)
         
  When running the same query on IQ 16.0 SP10 PL10, the same error also happened as below.
         
     **       Non-Fatal IQ Internal Error Detected
     **       at dflib/dfo.cxx:1966  on thread 140157769094912 (TID 423)
     **       Error detected at DFO #390 Parallel Combiner

• SAP IQ 16.0 SP10
• SAP IQ 16.0 SP11
• SAP IQ 16.1 

IQ, dflib/dfo.cxx:1978, dflib/dfo.cxx:1966, Parallel Combiner, dflib/dfo, dfo::ConstructWorkAllocatorInternal, ConstructWorkAllocatorInternal , KBA , BC-SYB-IQ , Sybase IQ , Bug Filed