add overlapping or incoherent instances

see OverlappingInstances and IncoherentInstances.

changed weight to 5

added Trac import + 1 deleted label

assigned to @trac-ijones and unassigned @trac-somebody

Trac metadata

Trac field	Value
Component	CompilerSupport → Proposal

changed title from add Overlapping Instances to add overlapping or incoherent instances

changed the description

assigned to @trac-none and unassigned @trac-ijones

changed milestone to %⊥

moving non-milestoned many year old legacy tickets out of the way

Set default priority (as this confuses Trac otherwise)

mentioned in issue #92

added enhancement modification labels and removed modification label