Re: [GHC] #12955: Confusing error (module is not loaded) when more hsigs provided than -instantiated-with

#12955: Confusing error (module is not loaded) when more hsigs provided than -instantiated-with -------------------------------------+------------------------------------- Reporter: ezyang | Owner: ezyang Type: bug | Status: new Priority: normal | Milestone: 8.2.1 Component: Compiler | Version: 8.1 Resolution: | Keywords: backpack 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 Edward Z. Yang ): In [changeset:"24f6bec94411aa6c39a2c94ce5154ffe96ae330f/ghc" 24f6bec9/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="24f6bec94411aa6c39a2c94ce5154ffe96ae330f" Sanity check if we pick up an hsig file without -instantiated-with. Summary: Previously we would just let compilation proceed along until we tried to pull up the Module for the hsig file, and get main:A instead of <A>, and get a mysterious error. Check for this earlier! Fixes #12955. Signed-off-by: Edward Z. Yang Test Plan: validate Reviewers: simonpj, austin, bgamari Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D2815 GHC Trac Issues: #12955 }}} -- Ticket URL: GHC The Glasgow Haskell Compiler