[jira] [Created] (IMPALA-11416) SlotRef::tuple_is_nullable_ uninitialised for struct children

["Daniel Becker (Jira)" <ji...@apache.org>]

Daniel Becker created IMPALA-11416:
--------------------------------------

             Summary: SlotRef::tuple_is_nullable_ uninitialised for struct children
                 Key: IMPALA-11416
                 URL: https://issues.apache.org/jira/browse/IMPALA-11416
             Project: IMPALA
          Issue Type: Bug
          Components: Backend
            Reporter: Daniel Becker
            Assignee: Daniel Becker


In {{SlotRef::Init}}, {{tuple_is_nullable_}} is only assigned a value if the {{SlotRef}} is not within a struct:
{code:cpp}
if (!slot_desc_->parent()->isTupleOfStructSlot()) {
      tuple_is_nullable_ = row_desc.TupleIsNullable(tuple_idx_);
}
{code}
https://github.com/apache/impala/blob/fefb9f24be1f99ac0077a8d6ef00834d8e90ef45/be/src/exprs/slot-ref.cc#L103

Otherwise {{tuple_is_nullable_}} remains uninitialised, leading to undefined behaviour when it is read.



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