[ARROW-11970] [C++][CI] Fix Valgrind failures

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.0.0
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/27802
• Assignee: Antoine Pitrou
• Reporter: Antoine Pitrou
• Created: 15/Mar/21 15:43
• Updated: 11/Jan/23 08:23
• Resolved: 16/Mar/21 13:06

Description

See errors in https://github.com/ursacomputing/crossbow/runs/2110197336 .
There are two sources of errors:

• GTest trying to print uninitialized memory when converting the CSV writer test params to a string
• The fast_float library sometimes reads uninitialized memory

Issue Links

• is related to: ARROW-11833 [C++] Vendored fast_float errors for emscripten (architecture flag missing)
• links to: GitHub Pull Request #9711