#15068: Small number of test case failures on Ubuntu Bionic (GCC 7.3) -------------------------------------+------------------------------------- Reporter: jrp | Owner: (none) Type: bug | Status: merge Priority: highest | Milestone: 8.6.1 Component: Compiler | Version: 8.4.1 (CodeGen) | Resolution: fixed | Keywords: Operating System: Linux | Architecture: x86_64 | (amd64) Type of failure: Incorrect result | Test Case: T13658 at runtime | T14779a T14779b T14868 debug | parsing001 Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4654 Wiki Page: | -------------------------------------+------------------------------------- Comment (by hvr): Replying to [comment:35 YitzGale]:
Thanks! Is the fix something that can be backported to previous versions of GHC?
It can be done, and this is typically something that falls into the scope of packagers and distributors if they need to target affected toolchains; in fact this is what I did in - GHC 8.2.2 (c.f. https://launchpad.net/~hvr/+archive/ubuntu/ghc/+sourcepub/9083599 /+listing-archive-extra) - GHC 8.4.2 (c.f. https://launchpad.net/~hvr/+archive/ubuntu/ghc/+sourcepub/9083600 /+listing-archive-extra) This has also happened in the past; without such backporting of compat- fixes I wouldn't be able to provide GHC versions ranging back to GHC 7.0.1 for the latest Debian & Ubuntu releases which had already made this necessary in the past thanks to evolving toolchains which broke assumptions made by GHC or happened to expose actual bugs, or were actually bugs in the C toolchain. -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15068#comment:36 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler