Tim Armstrong has posted comments on this change.

Change subject: IMPALA-3308: Get expr-test passing on PPC64LE
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Patch Set 1:

Actually I think we should go further to prevent such bugs in future. Currently 
it's still possible to create an invalid ExprValue just by copying it.

Could you add DISALLOW_COPY_AND_ASSIGN(ExprValue) to ExprValue (you'll see 
other examples in the codebase) and then update all of the constructions to use 
the in-place Init() pattern.

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Gerrit-MessageType: comment
Gerrit-Change-Id: I4504ee6a52a085f530aadfcfa009bacb83c64787
Gerrit-PatchSet: 1
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: segelyang <[email protected]>
Gerrit-Reviewer: Lars Volker <[email protected]>
Gerrit-Reviewer: Tim Armstrong <[email protected]>
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