#14880: GHC panic: updateRole -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: goldfire Type: bug | Status: new Priority: normal | Milestone: 8.8.1 Component: Compiler (Type | Version: 8.2.2 checker) | Resolution: | Keywords: TypeInType Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple crash or panic | Test Case: Blocked By: | Blocking: Related Tickets: #15076 | Differential Rev(s): Phab:D4769 Wiki Page: | -------------------------------------+------------------------------------- Comment (by tdammers): Speed test results: performance for the `NDFV` version is virtually identical to that of the baseline (which uses `FV`). So leaving out the list when it is not going to be demanded anyway makes absolutely no difference, as one would expect. Full logs to be attached. The relevant branches can be found on git.haskell.org: - `wip/T14880-baseline` (before the patch) - `wip/T14880` (patch applied as-is) - `wip/T14880-just-tvs` (just the move from `FV` to `VarSet`) - `wip/T14880-nondet-fv` (introducing the `NDFV` flavour of `FV`, but otherwise identical to the baseline) To reproduce logs, use something like: {{{#!bash for NAME in T14880-nondet-fv T14880 T14880-baseline T14880-just-tvs do echo "$NAME" git checkout "wip/$NAME" \ && ( make -j2 \ && (/usr/bin/time --verbose \ ~/path/to/ghc/inplace/bin/ghc-stage2 \ -c testsuite/tests/perf/compiler/T5631.hs \ -fforce-recomp \ +RTS -V0 -tlogs/$NAME.stat --machine-readable -RTS) \ |& tee logs/$NAME.timing \ && echo "$NAME" ) done }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14880#comment:82 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler