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Adding Deref impl affects lifetime bounds of other methods #27697

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#62016
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Adding Deref impl affects lifetime bounds of other methods#27697
#62016
Labels
A-lifetimesArea: Lifetimes / regionsA-type-systemArea: Type systemC-bugCategory: This is a bug.E-needs-testCall for participation: An issue has been fixed and does not reproduce, but no test has been added.T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.

Description

@frewsxcv
frewsxcv
opened on Aug 12, 2015

From https://users.rust-lang.org/t/does-implementing-deref-affect-the-lifetime-bounds-of-all-other-methods/

Code: http://is.gd/AkyE699 http://is.gd/AkyE69

If the Deref is removed, the code compiles. Presumably, the inclusion of the Deref implementation on the trait object causes the lifetime bounds to change on the do_something method.

Activity

  1. Stebalien commented on Aug 12, 2015

    @Stebalien
    Stebalien
    on Aug 12, 2015
    Contributor

    Code: http://is.gd/AkyE69

  2. bluss commented on Aug 12, 2015

    @bluss
    bluss
    on Aug 12, 2015
    Contributor

    For debugging, notice that impl Deref for MyTrait is equivalent to impl Deref for MyTrait + 'static.

  3. steveklabnik
    added
    A-type-systemArea: Type system
    A-lifetimesArea: Lifetimes / regions
    on Aug 13, 2015

  4. steveklabnik commented on Feb 7, 2017

    @steveklabnik
    steveklabnik
    on Feb 7, 2017
    Contributor

    Triage: still reproduces today.

  5. Mark-Simulacrum
    added
    C-bugCategory: This is a bug.
    on Jul 22, 2017

  6. frewsxcv commented on Jun 4, 2018

    @frewsxcv
    frewsxcv
    on Jun 4, 2018
    ContributorAuthor

    Triage: still reproduces today.

  7. pnkfelix commented on Feb 27, 2019

    @pnkfelix
    pnkfelix
    on Feb 27, 2019
    Contributor

    This no longer reproduces. Tagging as E-needstest

  8. pnkfelix
    added
    E-needs-testCall for participation: An issue has been fixed and does not reproduce, but no test has been added.
    T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.
    on Feb 27, 2019
  9. Centril
    added 3 commits that reference this issue on Jun 21, 2019

    Rollup merge of rust-lang#62016 - JohnTitor:add-test-for-issue-27697,…

    46948c6

    Rollup merge of rust-lang#62016 - JohnTitor:add-test-for-issue-27697,…

    daf231b

    Rollup merge of rust-lang#62016 - JohnTitor:add-test-for-issue-27697,…

    595f55c
  10. bors
    closed this as completedin #62016on Jun 22, 2019
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    A-lifetimesArea: Lifetimes / regionsA-type-systemArea: Type systemC-bugCategory: This is a bug.E-needs-testCall for participation: An issue has been fixed and does not reproduce, but no test has been added.T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.

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