[GHC] #15640: Add "difficulty" field to tickets

[GHC]

#15640: Add "difficulty" field to tickets
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           Reporter:  flip101        |             Owner:  hvr
               Type:  feature        |            Status:  new
  request                            |
           Priority:  normal         |         Milestone:
          Component:  Trac & Git     |           Version:
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:  Other          |   Type of failure:  None/Unknown
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
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 I propose to add a new field to tickets to indicate the difficulty of
 fixing a bug. This for three purposes:

 * The priority of the bug can be affected by the difficulty, thus making
 the difficulty visible as a field can be handy to set/affect the priority
 accordingly, example:
 https://ghc.haskell.org/trac/ghc/ticket/15579#comment:1

 * Can be welcoming to newcomers who want to contribute to GHC to start
 with tickets with low priority. The new field should be searchable so they
 can get a list of all tickets with low difficulty

 * Can make work on GHC more efficient by doing more high-priority / low-
 difficulty bugs. This plays into pareto principle - 80/20 rule

 As for the actual levels, "easy" or "hard" is subjective. So i think it's
 a good idea to have levels according to some experience level somebody
 should have. I can imagine some bugs can only be squashed by a few or even
 one person, while others can be jumped on by people who have decent
 haskell experience (given they want to read the background of setting up
 GHC dev and such).

 One could then argue that this field should then be named "skill level
 needed", but i like difficulty more :) And this also allows for situations
 where the bug can be fixed only by a few people who are really
 knowledgeable about the matter but still find a need for different
 gradients of difficulty level.

 Maybe something like:
 * Very easy - new to haskell
 * Easy - need haskell experience
 * Medium - need a lot of haskell experience
 * Hard - need experience with GHC dev
 * Very Hard - as before + profiling/debugging tools + system knowledge
 * Very Hard - as before + specific compiling techniques
 * Very Hard - as before + need C skills (for RTS)
 * ..

 I'm not sure how and who can change the Trac settings, but the procedure
 for this is described on this page:
 https://trac.edgewall.org/wiki/TracTicketsCustomFields

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15640>
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