#7878: Panic when using DerivingGeneric with hs-boot -------------------------------+-------------------------------------------- Reporter: ryant5000 | Owner: Type: bug | Status: new Priority: normal | Component: Compiler Version: 7.6.3 | Keywords: Os: Linux | Architecture: x86_64 (amd64) Failure: Compile-time crash | Blockedby: Blocking: | Related: -------------------------------+-------------------------------------------- When a module that uses DerivingGeneric has an hs-boot file, a panic like the following results: ghc: panic! (the 'impossible' happened) (GHC version 7.6.3 for x86_64-unknown-linux): tcIfaceGlobal (local): not found: main:A.D1Test{tc apn} [(roo,ghc: panic! (the 'impossible' happened) (GHC version 7.6.3 for x86_64-unknown-linux): ghc: panic! (the 'impossible' happened) (GHC version 7.6.3 for x86_64-unknown-linux): tcIfaceGlobal (local): not found: The attached files demonstrate the issue. To reproduce, run 'ghc --make C'. Note that running the same command a second time will not cause the error, unless *.hi* files are deleted. -- Ticket URL: http://hackage.haskell.org/trac/ghc/ticket/7878 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler