[GHC] #12494: Implementation of setenv in base incorrectly claims empty environment variable not supported on Windows

[GHC]

#12494: Implementation of setenv in base incorrectly claims empty environment
variable not supported on Windows
-------------------------------------+-------------------------------------
        Reporter:  ezyang            |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  libraries/base    |              Version:  8.0.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by bergmark):

 > On the one hand, we use semantic versioning to signal this very kind of
 semantic API changes; on the other hand, base makes inflationary use of
 major version increments due to its large API surface, so that we end up
 with a sub-optimal signal/noise ratio, resulting in API consumers not
 paying attention anymore... :-(
 Do people actually care less about the base changelog than for other
 packages? Semantic changes are always scary since they can be missed, but
 your point still stands.

 > > Change the parameter to only accept non-empty strings
 > how?
 Using NonEmpty Char, which is a bit wonky. ''dreams of non-empty
 literals''

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12494#comment:3>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler