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Location in GHCi debugger prompt printed twice when default prompt is used

    • Closed Issue created by Ömer Sinan Ağacan @osa1

    (Noticed in #8316)

    Test.hs:

    foo :: [Int]
foo = [ 1 .. 10 ]

    Reproducer:

    $ ghc-stage2 --interactive -ignore-dot-ghci Test.hs
GHCi, version 8.5.20180325: http://www.haskell.org/ghc/  :? for help
[1 of 1] Compiling Main             ( Test.hs, interpreted )
Ok, one module loaded.
*Main> :break foo
Breakpoint 0 activated at Test.hs:2:7-14
*Main> foo
Stopped in Main.foo, Test.hs:2:7-14
_result :: [Int] = _
[Test.hs:2:7-14] [Test.hs:2:7-14] *Main>

    The [Test.hs:2:7-14] part is repeated. Setting the prompt fixes it:

    $ ghc-stage2 --interactive Test.hs -ignore-dot-ghci
GHCi, version 8.5.20180325: http://www.haskell.org/ghc/  :? for help
[1 of 1] Compiling Main             ( Test.hs, interpreted )
Ok, one module loaded.
*Main> :set prompt "> "
> :break foo
Breakpoint 0 activated at Test.hs:2:7-14
> foo
Stopped in Main.foo, Test.hs:2:7-14
_result :: [Int] = _
[Test.hs:2:7-14] >
    Trac metadata
    Trac field Value
    Version 8.5
    Type Bug
    TypeOfFailure OtherFailure
    Priority normal
    Resolution Unresolved
    Component GHCi
    Test case
    Differential revisions
    BlockedBy
    Related
    Blocking
    CC
    Operating system
    Architecture
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