#15716: GHC hangs on default implementation of type family -------------------------------------+------------------------------------- Reporter: Heimdell | Owner: (none) Type: bug | Status: closed Priority: high | Milestone: 8.4.1 Component: Compiler | Version: 8.4.1 Resolution: duplicate | Keywords: Operating System: Linux | Architecture: x86_64 Type of failure: Compile-time | (amd64) crash or panic | Test Case: Blocked By: | Blocking: Related Tickets: #13601 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Changes (by RyanGlScott): * status: new => closed * resolution: => duplicate * related: => #13601 * milestone: => 8.4.1 Comment: Indeed, this was fixed in commit c2417b87ff59c92fbfa8eceeff2a0d6152b11a47 (Fix #13819 by refactoring TypeEqOrigin.uo_thing), which debuted in GHC 8.4. The `T13601` test case from #13601 demonstrates a very similar program which used to loop at compile-time before this commit, so I'll close this bug as a duplicate of #13601. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15716#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler