[GHC] #11247: Weird error from running runghc on an invalid input filename

[GHC]

#11247: Weird error from running runghc on an invalid input filename
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        Reporter:  rwbarton          |                Owner:
            Type:  bug               |               Status:  new
        Priority:  low               |            Milestone:
       Component:  Compiler          |              Version:  7.8.4
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  Incorrect         |  Unknown/Multiple
  warning at compile-time            |            Test Case:  runghc/T11247
      Blocked By:                    |             Blocking:
 Related Tickets:  #7765             |  Differential Rev(s):  Phab:D1678
       Wiki Page:                    |
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Comment (by thomie):

 Just putting down some notes here:

 * `runghc random.` calls `ghc -e :main random.`

 * The function function `partition_args` in `ghc/Main.hs` decides that
 `random.` doesn't look like a source file input.

 * So it becomes a linker input (`ldInputs`).

 * But then `classifyLdInput` in `compiler/main/Linker.hs` decides it isn't
 a suitable linker input either, and ignores it.

 From 948e7f388748078a8d9a324b284da7c4029f7060:

    In GHCi & Template Haskell, give a warning for things mentioned on the
 command line that we don't recognise, and then ignore them. In batch mode,
 these are still passed to the linker as before.

 Indeed, `ghc random.` shows an error produced by the linker:
 `gcc: error: random.: No such file or directory`

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11247#comment:3>
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