Re: [GHC] #15061: print022 testcase fails on i386

#15061: print022 testcase fails on i386 -------------------------------------+------------------------------------- Reporter: bgamari | Owner: osa1 Type: bug | Status: patch Priority: highest | Milestone: 8.6.1 Component: GHCi | Version: 8.2.2 Resolution: | Keywords: ci-breakage Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D4906 Wiki Page: | -------------------------------------+------------------------------------- Comment (by Ömer Sinan Ağacan ): In [changeset:"15bb4e0b6c08b1f8f5511f04af14242f13833ed1/ghc" 15bb4e0b/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="15bb4e0b6c08b1f8f5511f04af14242f13833ed1" Fix nptr field alignment in RtClosureInspect `extractSubTerms` (which is extracting pointer and non-pointer fields of a closure) was computing the alignment incorrectly when aligning a 64-bit value (e.g. a Double) on i386 by aligning it to 64-bits instead of to word size (32-bits). This is documented in `mkVirtHeapOffsetsWithPadding`:

Align the start offset (eg, 2-byte value should be 2-byte aligned). But not more than to a word.

Fixes #15061 Test Plan: Validated on both 32-bit and 64-bit. 32-bit fails with various unrelated stat failures, but no actual test failures. Reviewers: hvr, bgamari Reviewed By: bgamari Subscribers: simonpj, rwbarton, thomie, carter GHC Trac Issues: #15061 Differential Revision: https://phabricator.haskell.org/D4906 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15061#comment:9 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler