#13803: Panic while forcing the thunk for TyThing IsFile (regression) -------------------------------------+------------------------------------- Reporter: inaki | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.2.1-rc2 Resolution: | Keywords: hs-boot Operating System: Unknown/Multiple | Architecture: Type of failure: Compile-time | Unknown/Multiple crash or panic | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by ezyang): This appears to fix the problem but we may need to figure out something more efficient, since adding the forkM here affects ALL axioms we load from interfaces. {{{ diff --git a/compiler/iface/TcIface.hs b/compiler/iface/TcIface.hs index 3a6a4070d2..0fad1da50b 100644 --- a/compiler/iface/TcIface.hs +++ b/compiler/iface/TcIface.hs @@ -807,7 +807,7 @@ tc_iface_decl _parent ignore_prags tc_iface_decl _ _ (IfaceAxiom { ifName = tc_name, ifTyCon = tc , ifAxBranches = branches, ifRole = role }) = do { tc_tycon <- tcIfaceTyCon tc - ; tc_branches <- tc_ax_branches branches + ; tc_branches <- forkM (text "Axiom branches" <+> ppr tc_name) $ tc_ax_branches branches ; let axiom = CoAxiom { co_ax_unique = nameUnique tc_name , co_ax_name = tc_name , co_ax_tc = tc_tycon }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/13803#comment:12 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler