[C++][Fuzzing] IPC reads do not check decimal precision

[asfimport]

The fuzzit runs found the attached crash. The underlying issue is that Decimal precision values are checked to late (in the Decima constructor instead of in the IPC code).

Reporter: Marco Neumann / @crepererum
Assignee: Marco Neumann / @crepererum

Original Issue Attachments:

• crash-5e88bae6ac5250714e8c8bc73b9d67b949fadbb4

PRs and other links:

• GitHub Pull Request #8
• GitHub Pull Request #5104

_{Note: This issue was originally created as ARROW-6269. Please see the migration documentation for further details.}

[asfimport]

Antoine Pitrou / @pitrou:
Issue resolved by pull request 5104
#5104