#13535: vector test suite uses excessive memory on GHC 8.2 -------------------------------------+------------------------------------- Reporter: RyanGlScott | Owner: (none) Type: bug | Status: new Priority: highest | Milestone: 8.2.1 Component: Compiler | Version: 8.1 Keywords: | Operating System: Unknown/Multiple Architecture: | Type of failure: Compile-time Unknown/Multiple | performance bug Test Case: | Blocked By: Blocking: | Related Tickets: Differential Rev(s): | Wiki Page: -------------------------------------+------------------------------------- First noticed [https://github.com/haskell/vector/pull/161#issuecomment-292031845 here]. I haven't managed to boil this down to a test case with no dependencies yet, so for the time being, this requires `vector`. To reproduce, follow these steps: {{{ $ git clone https://github.com/erikd/vector $ cd vector/ $ cabal install --only-dependencies --enable-tests -w /opt/ghc/8.2.1/bin/ghc $ cabal configure --enable-tests -w /opt/ghc/8.2.1/bin/ghc $ cabal test }}} When building `vector-tests-O2`, GHC will stall when compiling the `Tests.Vector` module. On machines with modest memory allowances (e.g., [https://travis-ci.org/haskell/vector/jobs/218749281#L1270 the machines used on Travis CI]), GHC will be killed with an out-of-memory error after trying to compile `Tests.Vector` for a while. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13535 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler