#10051: panic - the 'impossible' happened ---------------------------------+----------------------------------------- Reporter: jpw1991 | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: GHCi | Version: 7.8.4 Resolution: | Keywords: Operating System: Windows | Architecture: x86_64 (amd64) Type of failure: GHCi crash | Test Case: Blocked By: | Blocking: Related Tickets: #7103, #9907 | Differential Revisions: ---------------------------------+----------------------------------------- Comment (by Austin Seipp <austin@…>): In [changeset:"a293925d810229fbea77d95f2b3068e78f8380cc/ghc"]: {{{ #!CommitTicketReference repository="ghc" revision="a293925d810229fbea77d95f2b3068e78f8380cc" rts/linker: ignore unknown PE sections Summary: Currently the linker tries to see if it understands/knows every section in the PE file before it continues. If it encounters a section it doesn't know about it errors out. Every time there's a change in MinGW compiler that adds a new section to the PE file this will break the ghc linker. The new sections don't need to be understood by `ghc` to continue so instead of erroring out the section is just ignored. When running with `-debug` the sections that are ignored will be printed. Test Plan: See the file `ghcilinkerbug.zip` in #9907. 1) unzip file content. 2) open examplecpp.cabal and change base <4.8 to <4.9. 3) execute cabal file with cabal repl. Applying the patch makes `cabal repl` in step 3) work. Note that the file will fail on a `___mingw_vprintf` not being found. This is because of the `cc-options` specifying `-std=c++0x`, which will also require `libmingwex.a` to be linked in but wasn't specified in the cabal file. To fix this, remove the `cc-options` which defaults to c99. Reviewers: austin Reviewed By: austin Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D671 GHC Trac Issues: #9907, #7103, #10051, #7056, #8546 }}} -- Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10051#comment:4> GHC <http://www.haskell.org/ghc/> The Glasgow Haskell Compiler