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  1. Core Server
  2. SERVER-30571

EphemeralForTest oplogStartHack segfaults if startingPosition is behind oplog

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    • Backwards Compatibility:
      Fully Compatible
    • Operating System:
      ALL
    • Sprint:
      Repl 2017-08-21

      Description

          Records::const_iterator it = records.lower_bound(startingPosition);
          if (it == records.end() || it->first > startingPosition)
              --it;
       
          return it->first;
      

      This loop should first check that it != records.begin(). Otherwise --it will fall off the front of the map.

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