[GHC] #2810: Debugger: change context to the module containing the current breakpoint

[GHC]

#2810: Debugger: change context to the module containing the current breakpoint
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  Reporter:  simonmar          |          Owner:                  
      Type:  feature request   |         Status:  new             
  Priority:  normal            |      Milestone:  6.12 branch     
 Component:  GHCi              |        Version:  6.8.3           
  Severity:  normal            |       Keywords:                  
Difficulty:  Moderate (1 day)  |       Testcase:                  
        Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
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 Moved part of #2740 here.

 When we stop at a breakpoint, perhaps we should change the current context
 (`:module`) to the module that contains the breakpoint location.  That
 would at least give access to a similar scope to that in which the
 breakpoint expression is located.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2810>
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