#14285: Entered absent arg - triggered by INLINEABLE, regression from 8.0.2 --------------------------------------+--------------------------------- Reporter: j.waldmann | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.1 Keywords: | Operating System: Linux Architecture: x86_64 (amd64) | Type of failure: None/Unknown Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: --------------------------------------+--------------------------------- Steps to reproduce: {{{ git clone https://gitlab.imn.htwk-leipzig.de/waldmann/pure-matchbox git checkout a2005d246cb7bd77a33bf4c09419534bc7ecd435 stack build .stack-work/install/x86_64-linux/nightly-2017-09-26/8.2.1/bin/pure- matchbox -i -w Count data/z001.srs }}} Output: {{{ pure-matchbox: Oops! Entered absent arg ww Map k (Set k1) }}} Error goes away when compiling with -O0, or when removing this pragma in src/Matchbox/Pairs.hs {{{ 52 {-# INLINEABLE pre_images #-} 53 pre_images x rel = images x $ mirrorRel rel }}} (normal output starts with YES on a single line) Error also goes away when building with 8.0.2 {{{ PATH=/where/you/have/installed/ghc-8.0.2/bin:$PATH stack build --resolver=lts-9.6 }}} I tried to isolate a shorter test case but gave up after some hours. Is there some automation for this? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14285 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler