Coverity analysis defect 174965: Use of auto that causes a copy

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    • Type: Bug
    • Resolution: Unresolved
    • Priority: Major - P3
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    • Affects Version/s: None
    • Component/s: None
    • Query Optimization
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    • 3
    • TBD
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      Use of auto that causes a copy

      Unnecessary object copies can affect performance. Using the auto keyword without an & causes a copy.
      /data/mci/6140986752f315ae1d2c1d7ffa1ce13a/bazel_cache/1e034c4de3ae6337dc7b387a79ef43e8/execroot/_main/src/mongo/db/pipeline/sharded_agg_helpers.cpp:1154: AUTO_CAUSES_COPY 174965 Using the "auto" keyword without an "&" causes the copy of an object of type "mongo::decorable_detail::DecorationToken<mongo::OperationContext, mongo::ReadPreferenceSetting>::DecorationType".
      /data/mci/6140986752f315ae1d2c1d7ffa1ce13a/bazel_cache/1e034c4de3ae6337dc7b387a79ef43e8/execroot/_main/src/mongo/db/pipeline/sharded_agg_helpers.cpp:1154: AUTO_CAUSES_COPY 174965 The variable "readPref" has a non-"const" type, however its value is never changed.

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            Reporter:
            Coverity Collector User
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              Created:
              Updated: