[GHC] #12194: ghc-pkg, package database path containing a trailing slash, and ${pkgroot}

[GHC]

#12194: ghc-pkg, package database path containing a trailing slash, and ${pkgroot}
-------------------------------------+-------------------------------------
        Reporter:  dudebout          |                Owner:
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  ghc-pkg           |              Version:  8.0.1
      Resolution:                    |             Keywords:  pkgroot
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Incorrect result  |  Unknown/Multiple
  at runtime                         |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D2336
       Wiki Page:                    |
-------------------------------------+-------------------------------------

Comment (by dudebout):

 I am seeing the same issue in ghc. If I am not mistaken, the same fix
 applies in ghc/compiler/main/Packages.hs at line 419:
 https://github.com/ghc/ghc/blob/1937ef1c506b538f0f93cd290fa4a42fc85ab769/compiler/main/Packages.hs#L419

 Reading line 355 to 449, it seems like the name is taken straight from the
 option or env var. See in particular lines 374/376/393 where the name
 comes from.

 I have not tried runghc. Would that share the ghc code?

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/12194#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler