#13185: haskell-relational-query: ghc: panic! (the 'impossible' happened) -------------------------------------+------------------------------------- Reporter: LocutusOfBorg | Owner: (none) Type: bug | Status: new Priority: high | Milestone: Component: Compiler | Version: 8.0.2 Resolution: | Keywords: Operating System: Linux | Architecture: | Unknown/Multiple Type of failure: Compile-time | Test Case: build crash or panic | relational-query with ghc 8.0.2 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by RyanGlScott): Thanks, LocutusOfBorg. I needed to constraint `persistable-record`: {{{ $ cabal install --enable-tests --constraint=persistable-record==0.4.1.0 --dry-run Resolving dependencies... In order, the following would be installed (use -v for more details): dlist-0.8.0.2 names-th-0.2.0.2 primitive-0.6.2.0 random-1.1 sql-words-0.1.4.1 text-1.2.2.2 tf-random-0.5 QuickCheck-2.9.2 quickcheck-simple-0.1.0.1 th-data-compat-0.0.2.2 persistable-record-0.4.1.0 (latest: 0.5.0.1) th-reify-compat-0.0.1.1 time-locale-compat-0.1.1.3 relational-query-0.8.3.2 (latest: 0.9.1.0) }}} With this set of dependencies, I was able to reproduce the bug. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13185#comment:15 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler