#16104: Plugin name lookup behavior change from GHC 8.4 series -------------------------------------+------------------------------------- Reporter: lerkok | Owner: (none) Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 8.6.3 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 michaelpj): I think we're also observing this. I think this is not the intended behaviour. Looking at the documentation of `thNameToGhcName` it says: "Qualified or unqualified TH names will be dynamically bound to names in the module being compiled, if possible." My interpretation of this was: if you can import the name qualified in the module being compiled when the core plugin triggers, then the name lookup should succeed. This seems to no longer be true. I can also confirm that adding (unused) imports for the modules whose names are being accessed makes the lookup work again. In our case the plugin *is* registered via a separate package and we're still seeing this. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16104#comment:4 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler