#12532: Remove sum and tuple names from knownKeyNames -------------------------------------+------------------------------------- Reporter: bgamari | Owner: Type: task | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.0.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by bgamari): Right, but the problem that I describe is actually quite orthogonal to the known-key encoding issue. The problem is that while generating a fingerprint for an `IfaceDecl` we override the implementation of `putName` in to resolve ensure that the fingerprints the things it refers to are included in its fingerprint. We do this by building up a `NameEnv Fingerprint` as we walk the `IfaceDecl`s in dependency order. Previously this was fine since none of the `Name`s we would serialize were binding occurrences. However, now that `IfaceTopBndr` is also a `Name` we have lost the ability to distinguish binding from non-binding occurrences. This breaks the fingerprinting implementation since we then end up attempting to lookup the `Name` (and implicit `Name`s) of the thing we are trying to fingerprint since its serialization contains a binding `Name`. In writing this the solution here became fairly obvious: simply tell `putName` whether it is serializing a binding or non-binding occurrence. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/12532#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler