Bug #22469: parse.y hash key does not warn on -0.0

• Status: Open
• Assignee: -
• Target version: -
• Backport: 3.3: UNKNOWN, 3.4: UNKNOWN, 4.0: UNKNOWN

[kddnewton (Kevin Newton)]

When generating warnings for duplicate keys (hash keys or case-when clauses) parse.y misses warning on -0.0 and 0.0 because it doesn't normalize it like a Ruby hash does.

{ 0.0 => 1, -0.0 => 1 }

^-- should warn