Skip to content

GitLab

  • Menu
Projects Groups Snippets
  • Help
    • Help
    • Support
    • Community forum
    • Submit feedback
  • Sign in / Register
  • GHC GHC
  • Project information
    • Project information
    • Activity
    • Labels
    • Members
  • Repository
    • Repository
    • Files
    • Commits
    • Branches
    • Tags
    • Contributors
    • Graph
    • Compare
    • Locked Files
  • Issues 4,929
    • Issues 4,929
    • List
    • Boards
    • Service Desk
    • Milestones
    • Iterations
  • Merge requests 461
    • Merge requests 461
  • CI/CD
    • CI/CD
    • Pipelines
    • Jobs
    • Schedules
    • Test Cases
  • Deployments
    • Deployments
    • Releases
  • Analytics
    • Analytics
    • Value stream
    • CI/CD
    • Code review
    • Insights
    • Issue
    • Repository
  • Wiki
    • Wiki
  • Snippets
    • Snippets
  • Activity
  • Graph
  • Create a new issue
  • Jobs
  • Commits
  • Issue Boards
Collapse sidebar
  • Glasgow Haskell Compiler
  • GHCGHC
  • Issues
  • #9583
Closed
Open
Created Sep 12, 2014 by Edward Z. Yang@ezyangDeveloper

Simplifier ticks exhausted while compiling Cabal HEAD

Steps to reproduce:

  1. Clone Cabal HEAD
  2. cabal configure --with-ghc=/path/to/ghc-head
  3. dist/setup/setup build

Actual results:

[ 8 of 78] Compiling Distribution.Text ( Distribution/Text.hs, dist/build/Distribution/Text.o )
[ 9 of 78] Compiling Distribution.Version ( Distribution/Version.hs, dist/build/Distribution/Version.o )
ghc-stage2: panic! (the 'impossible' happened)
  (GHC version 7.9.20140911 for x86_64-unknown-linux):
        Simplifier ticks exhausted
    When trying UnfoldingDone GHC.Word.$fNumWord8_$c+
    To increase the limit, use -fsimpl-tick-factor=N (default 100)
    If you need to do this, let GHC HQ know, and what factor you needed
    To see detailed counts use -ddump-simpl-stats
    Total ticks: 813720

Please report this as a GHC bug:  http://www.haskell.org/ghc/reportabug

I know that it still fails with tick factor 4096; I haven't found a tick amount which makes it succeed.

Trac metadata
Trac field Value
Version 7.9
Type Bug
TypeOfFailure OtherFailure
Priority highest
Resolution Unresolved
Component Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information
Assignee
Assign to
Time tracking