#10288: -flate-dmd-anal triggers "Entered absent arg" -------------------------------------+------------------------------------- Reporter: yongqli | Owner: Type: bug | Status: infoneeded Priority: normal | Milestone: Component: Compiler | Version: 7.10.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Runtime crash | Unknown/Multiple Blocked By: | Test Case: Related Tickets: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by yongqli): See Main.hs here: https://gist.github.com/yongqli/5dc94aeaeda2e24c6637 You need the following packages: {{{ linear, lens, vector, vector-th- unbox, strict }}} Running with {{{ ghc Main.hs -O2 -flate-dmd-anal -fforce-recomp; ./Main }}} will give {{{ Main: Oops! Entered absent arg w_sGY6 MVN V1 Double }}} It takes about 3 days's worth of work to produce a test case like this. Is there a better option than deleting a piece of code and then recompiling? I essentially have to "unwrite" my whole program. Is there a fuzzer-like tool that could conceivably be used? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10288#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler