[IMPALA-7461] TestDecimalFuzz hits DCHECK math-functions-ir.cc "Check failed lhs > 0 && rhs > 0"

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Duplicate
• Affects Version/s: Impala 3.1.0
• Component/s: Backend
• Labels: broken-build
• Target Version: Impala 3.1.0
• Epic Color: ghx-label-2
• Assignee: Joe McDonnell
• Reporter: Joe McDonnell
• Created: 17/Aug/18 23:16
• Updated: 18/Aug/18 20:40
• Resolved: 17/Aug/18 23:21

Description

Several builds have been failing with an impalad hitting this DCHECK:

auto MultiplicationOverflows = [](ActualType lhs, ActualType rhs) {
  DCHECK(lhs > 0 && rhs > 0); <----- HERE
  using ActualType = decltype(lhs);
  return BitUtil::CountLeadingZeros(lhs) + BitUtil::CountLeadingZeros(rhs) <=
  BitUtil::UnsignedWidth<ActualType>() + 1;
};

This happens during the TestDecimalFuzz test:

I0817 10:50:44.950784 10364 Frontend.java:1024] Analyzing query: select width_bucket(cast(-10.0 as decimal(8,6)), cast(-10.0 as decimal(3,1)), cast(6490371073.16853453566312041152511 as decimal(36,25)), 26386065)
F0817 10:50:44.952258 10364 math-functions-ir.cc:516] Check failed: lhs > 0 && rhs > 0

It looks like a regression due to the fix for IMPALA-7412.

Issue Links

• duplicates: IMPALA-7459 Query with width_bucket() crashes with Check failed: lhs > 0 && rhs > 0