case fails for vectors with negative numbers

Description

The last case should return true like the other,

Real life example that triggered this:

Explaination: This is caused by `case` using `hashCode` instead of hashEq for hash comparisons (when not wrapped in a vector, the comparison is direct) and the fact that negative integers and negative longs hash differently while positive ones hash identical.
Porposal: Make `case` use hasheq instead of hashCode

Patch: 0001-switch-to-hasheq-for-case.patch

Prescreened by: Alex Miller

Environment

OSX

Assignee

Unassigned

Reporter

import

Labels

Approval

Prescreened

Patch

Code and Test

Affects versions

Priority

Critical
Configure