[GHC] #14043: GHC.Stack.callStack throws exception

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[GHC] #14043: GHC.Stack.callStack throws exception

GHC - devs mailing list
#14043: GHC.Stack.callStack throws exception
-------------------------------------+-------------------------------------
           Reporter:  bgamari        |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  high           |         Milestone:  8.4.1
          Component:  Compiler       |           Version:  8.0.1
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 This program,
 {{{#!hs
 import GHC.Stack
 main :: IO ()
 main =  putStrLn (prettyCallStack $ id (\_ -> callStack) ())
 }}}
 terminates with,
 {{{
 Hi: popCallStack: empty stack
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14043>
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Re: [GHC] #14043: GHC.Stack.callStack throws exception

GHC - devs mailing list
#14043: GHC.Stack.callStack throws exception
-------------------------------------+-------------------------------------
        Reporter:  bgamari           |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  high              |            Milestone:  8.4.1
       Component:  Compiler          |              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 bgamari):

 The problem appears to be that `callStack` is defined directly in terms of
 `popCallStack`, which fails on an empty stack. Presumably we should just
 return an empty stack in this case.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14043#comment:1>
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The Glasgow Haskell Compiler

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Re: [GHC] #14043: GHC.Stack.callStack throws exception

GHC - devs mailing list
In reply to this post by GHC - devs mailing list
#14043: GHC.Stack.callStack throws exception
-------------------------------------+-------------------------------------
        Reporter:  bgamari           |                Owner:  (none)
            Type:  bug               |               Status:  patch
        Priority:  high              |            Milestone:  8.4.1
       Component:  Compiler          |              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):  Phab:D3795
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by bgamari):

 * status:  new => patch
 * differential:   => Phab:D3795


--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14043#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler

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Re: [GHC] #14043: GHC.Stack.callStack throws exception

GHC - devs mailing list
In reply to this post by GHC - devs mailing list
#14043: GHC.Stack.callStack throws exception
-------------------------------------+-------------------------------------
        Reporter:  bgamari           |                Owner:  (none)
            Type:  bug               |               Status:  closed
        Priority:  high              |            Milestone:  8.4.1
       Component:  Compiler          |              Version:  8.0.1
      Resolution:  fixed             |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):  Phab:D3795
       Wiki Page:                    |
-------------------------------------+-------------------------------------
Changes (by bgamari):

 * status:  patch => closed
 * resolution:   => fixed


Comment:

 This was merged.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/14043#comment:3>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler

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