#10278: ApiAnnotations : Nested forall loses forall annotation -------------------------------------+------------------------------------- Reporter: alanz | Owner: alanz Type: bug | Status: new Priority: normal | Milestone: 7.10.2 Component: Compiler | Version: 7.10.1 (Parser) | Keywords: Resolution: | ApiAnnotations Operating System: Unknown/Multiple | Architecture: Type of failure: None/Unknown | Unknown/Multiple Blocked By: | Test Case: Related Tickets: | Blocking: | Differential Revisions: -------------------------------------+------------------------------------- Comment (by alanz): @jstolarek has pointed out that the offending function is `HsTypes.mk_forall_ty` -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10278#comment:1 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#10278: ApiAnnotations : Nested forall loses forall annotation -------------------------------------+------------------------------------- Reporter: alanz | Owner: alanz Type: bug | Status: patch Priority: normal | Milestone: 7.10.2 Component: Compiler | Version: 7.10.1 (Parser) | Keywords: Resolution: | ApiAnnotations Operating System: Unknown/Multiple | Architecture: Type of failure: None/Unknown | Unknown/Multiple Blocked By: | Test Case: Related Tickets: | Blocking: | Differential Revisions: Phab:D833 -------------------------------------+------------------------------------- Changes (by alanz): * status: new => patch Comment: Although there is a version in development that gets rid of the collapsing, I am not going to have time to chase the last bugs through in the near future, and the Phab:D833 version will get the job done for ghc- exactprint in the interim. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10278#comment:3 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#10278: ApiAnnotations : Nested forall loses forall annotation -------------------------------------+------------------------------------- Reporter: alanz | Owner: alanz Type: bug | Status: patch Priority: normal | Milestone: 7.10.2 Component: Compiler | Version: 7.10.1 (Parser) | Keywords: Resolution: | ApiAnnotations Operating System: Unknown/Multiple | Architecture: Type of failure: None/Unknown | Unknown/Multiple Blocked By: | Test Case: Related Tickets: | Blocking: | Differential Revisions: | Phab:D833,Phab:D836 -------------------------------------+------------------------------------- Comment (by Austin Seipp ): In [changeset:"81030ede73c4e3783219b2a8d7463524e847cfce/ghc"]: {{{ #!CommitTicketReference repository="ghc" revision="81030ede73c4e3783219b2a8d7463524e847cfce" ApiAnnotations : Nested forall loses forall annotation When parsing {-# LANGUAGE ScopedTypeVariables #-} extremumNewton :: forall tag. forall tag1. tag -> tag1 -> Int extremumNewton = undefined The parser attaches an AnnForall to the second forall, which appears as a nested HsForAllTy. Somewhere this nesting is flattened, and the tyvarbndrs are collapsed into a single HsForAllTy. In this process the second AnnForAll loses its anchor in the AST. Reviewed By: austin Differential Revision: https://phabricator.haskell.org/D833 GHC Trac Issues: #10278 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10278#comment:5 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

#10278: ApiAnnotations : Nested forall loses forall annotation -------------------------------------+------------------------------------- Reporter: alanz | Owner: alanz Type: bug | Status: closed Priority: normal | Milestone: 7.10.2 Component: Compiler | Version: 7.10.1 (Parser) | Keywords: Resolution: fixed | ApiAnnotations Operating System: Unknown/Multiple | Architecture: Type of failure: None/Unknown | Unknown/Multiple Blocked By: | Test Case: Related Tickets: | Blocking: | Differential Revisions: | Phab:D833,Phab:D836 -------------------------------------+------------------------------------- Changes (by thoughtpolice): * status: patch => closed * resolution: => fixed Comment: Merged to `ghc-7.10`. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/10278#comment:7 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler