#14318: TH shadowing bind statement triggers -Wunused-matches -------------------------------------+------------------------------------- Reporter: lyxia | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Template Haskell | Version: 8.2.1 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: Type of failure: Incorrect | Unknown/Multiple error/warning at compile-time | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by mgsloan): Ah, here is a ticket about TH allowing you to produce non-unique uniques: https://ghc.haskell.org/trac/ghc/ticket/11812 So, I suspect that the proper solution here would involve making it so that TH cannot produce non-unique binding of unique names. There is some tricky stuff here, though. I can imagine a scenario where a TH user might rely on storing unique names in memory and re-using them between splices. This makes the task of further unique-ification quite non-trivial. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/14318#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler