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  1. 03 Oct, 2017 11 commits
    • Tamar Christina's avatar
      Add ability to produce crash dumps on Windows · ec9ac20d
      Tamar Christina authored
      It's often hard to debug things like segfaults on Windows,
      mostly because gdb isn't always of use and users don't know
      how to effectively use it.
      
      This patch provides a way to create a crash drump by passing
      
      `+RTS --generate-crash-dumps` as an option. If any unhandled
      exception is triggered a dump is made that contains enough
      information to be able to diagnose things successfully.
      
      Currently the created dumps are a bit big because I include
      all registers, code and threads information.
      
      This looks like
      
      ```
      $ testsuite/tests/rts/derefnull.run/derefnull.exe +RTS
      --generate-crash-dumps
      
      Access violation in generated code when reading 0000000000000000
      Crash dump created. Dump written to:
              E:\msys64\tmp\ghc-20170901-220250-11216-16628.dmp
      ```
      
      Test Plan: ./validate
      
      Reviewers: austin, hvr, bgamari, erikd, simonmar
      
      Reviewed By: bgamari, simonmar
      
      Subscribers: rwbarton, thomie
      
      Differential Revision: https://phabricator.haskell.org/D3912
      ec9ac20d
    • Herbert Valerio Riedel's avatar
      Sync base/changelog.md · 55001c0c
      Herbert Valerio Riedel authored
      This updates the base-4.10.0.0 entry heading which has diverged from
      
       http://hackage.haskell.org/package/base-4.10.0.0/src/changelog.md
      
      and while at it also sets the GHC version for the base-4.11 entry to
      avoid confusion about what GHC 8.2.2's base is going to include.
      
      [skip ci]
      55001c0c
    • Joachim Breitner's avatar
      Revert installing texinfo in CI systems · a36eea1a
      Joachim Breitner authored
      This reverts commit 00ff0235.
      This reverts commit 11a59de2.
      a36eea1a
    • Ryan Scott's avatar
      Add regression test for #9725 · a02039c7
      Ryan Scott authored
      Kind equalities saves the day!
      a02039c7
    • Simon Peyton Jones's avatar
      Suppress error cascade in record fields · cb767542
      Simon Peyton Jones authored
      When a record contruction or pattern uses a data constructor
      that isn't in scope, we may produce spurious ambiguous-field
      errors (Trac #14307).  E.g.
      
         f (A { fld = x }) = e
      
      where 'A' is not in scope.  We want to draw attention to the
      out-of-scope data constructor first; once that is fixed we
      can think about the fields.
      
      This patch suppresses the field errors if the data con is out
      of scope.
      cb767542
    • Simon Peyton Jones's avatar
      Fix nasty bug in w/w for absence analysis · dbbee1ba
      Simon Peyton Jones authored
      This dark corner was exposed by Trac #14285.  It involves the
      interaction between absence analysis and INLINABLE pragmas.
      
      There is a full explanation in Note [aBSENT_ERROR_ID] in MkCore,
      which you can read there.  The changes in this patch are
      
      * Make exprIsHNF return True for absentError, treating
        absentError like an honorary data constructor.
      
      * Make absentError /not/ be diverging, unlike other error Ids.
      
      This is all a bit horrible.
      
      * While doing this I found that exprOkForSpeculation didn't
        have a case for value lambdas so I added one.  It's not
        really called on lifted types much, but it seems like the
        right thing
      dbbee1ba
    • Simon Peyton Jones's avatar
      Make GHC.IO.Buffer.summaryBuffer strict · b1e0c65a
      Simon Peyton Jones authored
      I came across this when debugging something else.  Making it strict
      improves the code slightly without affecting behaviour.
      b1e0c65a
    • Simon Peyton Jones's avatar
      Fix bug in the short-cut solver · a8fde183
      Simon Peyton Jones authored
      Trac #13943 showed that the relatively-new short-cut solver
      for class constraints (aka -fsolve-constant-dicts) was wrong.
      In particular, see "Type families" under Note [Shortcut solving]
      in TcInteract.
      
      The short-cut solver recursively solves sub-goals, but it doesn't
      flatten type-family applications, and as a result it erroneously
      thought that C (F a) cannot possibly match (C 0), which is
      simply untrue.  That led to an inifinte loop in the short-cut
      solver.
      
      The significant change is the one line
      
      +                 , all isTyFamFree preds  -- See "Type families" in
      +                                          -- Note [Shortcut solving]
      
      but, as ever, I do some other refactoring.  (E.g. I changed the
      name of the function to shortCutSolver rather than the more
      generic trySolveFromInstance.)
      
      I also made the short-cut solver respect the solver-depth limit,
      so that if this happens again it won't just produce an infinite
      loop.
      
      A bit of other refactoring, notably moving isTyFamFree
      from TcValidity to TcType
      a8fde183
    • Simon Peyton Jones's avatar
      Comments only · a1fc7ce3
      Simon Peyton Jones authored
      a1fc7ce3
    • Moritz Angermann's avatar
      Adds x86 NONE relocation type · a4ee2897
      Moritz Angermann authored
      Summary:
      As reported by Alex Lang, R_X86_64_NONE relocations
      appear in per-package object files, not per-module object
      files. This diff adds _NONE relocations for x86.
      
      Reviewers: bgamari, geekosaur, austin, erikd, simonmar
      
      Reviewed By: geekosaur
      
      Subscribers: rwbarton, thomie
      
      Differential Revision: https://phabricator.haskell.org/D4062
      a4ee2897
    • Moritz Angermann's avatar
      No libffi docs · d0c5d8de
      Moritz Angermann authored
      Summary:
      building libffi docs with our intree-libffi seems
      rather pointless.
      
      Reviewers: bgamari, austin
      
      Reviewed By: bgamari
      
      Subscribers: rwbarton, thomie
      
      Differential Revision: https://phabricator.haskell.org/D4054
      d0c5d8de
  2. 02 Oct, 2017 8 commits
  3. 30 Sep, 2017 5 commits
  4. 29 Sep, 2017 2 commits
  5. 28 Sep, 2017 1 commit
    • Simon Marlow's avatar
      mkDataConRep: fix bug in strictness signature (#14290) · 5935acdb
      Simon Marlow authored
      The strictness signature for a data con wrapper wasn't including any
      dictionary arguments, which meant that bangs on the fields of a
      constructor with an existential context would be moved to the wrong
      fields.  See T14290 for an example.
      
      Test Plan:
      * New test T14290
      * validate
      
      Reviewers: simonpj, niteria, austin, bgamari, erikd
      
      Reviewed By: simonpj, bgamari
      
      Subscribers: rwbarton, thomie
      
      GHC Trac Issues: #14290
      
      Differential Revision: https://phabricator.haskell.org/D4040
      5935acdb
  6. 27 Sep, 2017 8 commits
  7. 26 Sep, 2017 5 commits