[ARROW-914] [C++/Python] Fix Decimal ToBytes

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.3.0
• Fix Version/s: 0.3.0
• Component/s: C++
• External issue URL: https://github.com/apache/arrow/issues/16515
• Assignee: Phillip Cloud
• Reporter: Phillip Cloud
• Created: 29/Apr/17 21:48
• Updated: 11/Jan/23 07:11
• Resolved: 30/Apr/17 00:53

Description

We're currently copying unused bytes when using boost int128_t, which results in us putting garbage values at the end of the 16 byte buffer coming from boost.