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https://issues.apache.org/jira/browse/IMPALA-15379?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Smith resolved IMPALA-15379.
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Fix Version/s: Impala 5.0.0
Resolution: Fixed
> Undefined VLA size 0 in CodegenEvalConjuncts and CodegenMaterializeExprs
> ------------------------------------------------------------------------
>
> Key: IMPALA-15379
> URL: https://issues.apache.org/jira/browse/IMPALA-15379
> Project: IMPALA
> Issue Type: Bug
> Components: Backend
> Reporter: Michael Smith
> Assignee: Michael Smith
> Priority: Major
> Fix For: Impala 5.0.0
>
>
> Creating a variable-length array with size 0 is undefined in C (and VLAs are
> only allowed in C++ via GCC/Clang extensions).
> ExecNode::CodegenEvalConjuncts and Tuple::CodegenMaterializeExprs both
> initialize VLAs that can have an input size of 0, which newer Clang versions
> identify in UBSAN builds.
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