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Diffstat (limited to 'compiler/iface/TcIface.lhs')
| -rw-r--r-- | compiler/iface/TcIface.lhs | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/compiler/iface/TcIface.lhs b/compiler/iface/TcIface.lhs index a1cd558bc0..0de092742c 100644 --- a/compiler/iface/TcIface.lhs +++ b/compiler/iface/TcIface.lhs @@ -1283,8 +1283,13 @@ tcIfaceGlobal name -- emasculated form (e.g. lacking data constructors). tcIfaceTyCon :: IfaceTyCon -> IfL TyCon -tcIfaceTyCon (IfaceTc name) = do { thing <- tcIfaceGlobal name - ; return (tyThingTyCon thing) } +tcIfaceTyCon (IfaceTc name) + = do { thing <- tcIfaceGlobal name + ; case thing of -- A "type constructor" can be a promoted data constructor + -- c.f. Trac #5881 + ATyCon tc -> return tc + ADataCon dc -> return (buildPromotedDataCon dc) + _ -> pprPanic "tcIfaceTyCon" (ppr name $$ ppr thing) } tcIfaceCoAxiom :: Name -> IfL CoAxiom tcIfaceCoAxiom name = do { thing <- tcIfaceGlobal name |