[GHC] #10834: Test suite: Resistance against CallStack line number changes

[GHC]

#10834: Test suite: Resistance against CallStack line number changes
-------------------------------------+-------------------------------------
              Reporter:  nomeata     |             Owner:
                  Type:  bug         |            Status:  new
              Priority:  normal      |         Milestone:
             Component:  Test Suite  |           Version:  7.10.2
              Keywords:              |  Operating System:  Unknown/Multiple
          Architecture:              |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
             Test Case:              |        Blocked By:
              Blocking:              |   Related Tickets:
Differential Revisions:              |
-------------------------------------+-------------------------------------
 Hi,

 I just got this:

 {{{
 Actual stderr output differs from expected:
 --- ./ghci/scripts/T10501.stderr.normalised     2015-09-03
 00:20:22.622940998 +0000
 +++ ./ghci/scripts/T10501.run.stderr.normalised 2015-09-03
 00:20:22.622940998 +0000
 @@ -1,6 +1,6 @@
  *** Exception: Prelude.head: empty list
  CallStack:
 -  error, called at libraries/base/GHC/List.hs:1009:3 in base:GHC.List
 +  error, called at libraries/base/GHC/List.hs:1011:3 in base:GHC.List
  *** Exception: Prelude.undefined
  CallStack:
    error, called at libraries/base/GHC/Err.hs:42:14 in base:GHC.Err
 *** unexpected failure for T10501(ghci)
 }}}

 Having the test suite so fragile is annoying. Would it be possible to
 ignore line number differences in call stacks?

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10834>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler