Add PrelRules for par#

seq# and spark# are elided when their arguments are known to be evaluated. par#, however, is not. Presumably this leads to sparks being created and then immediately going away.

Trac metadata

Trac field	Value
Version	8.4.3
Type	Bug
TypeOfFailure	OtherFailure
Priority	low
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC	simonmar
Operating system
Architecture

changed milestone to %8.6.1

changed weight to 3

added Tbug Trac import labels

That sounds plausible to me.

par# should have been deprecated back in 7.2 when we added spark#. We don't use it any more. Let's just add a deprecated note to it and remove it in a future release.

changed milestone to %8.8.1

These won't be fixed in GHC 8.6

mentioned in commit feb8a671

changed milestone to %8.10.1

Bumping milestones of low-priority tickets.

closed

par# is now deprecated, closing.

Trac metadata

Trac field	Value
Resolution	Unresolved → ResolvedFixed

added newcomer label

added runtime perf label

added Plow label

mentioned in merge request !5548 (closed)

mentioned in issue #24825