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NLL: incorrect "unused mut" lint warning, with multiple closures #51904

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#51964
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NLL: incorrect "unused mut" lint warning, with multiple closures#51904
#51964
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matthewjasper
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A-NLLArea: Non-lexical lifetimes (NLL)C-enhancementCategory: An issue proposing an enhancement or a PR with one.T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.
Milestone
Rust 2018 Preview 2

Description

@lqd
lqd
opened on Jun 29, 2018

Found while trying to bootstrap Rust with NLL enabled, just in case we're not already tracking this incorrect warning (as we're already tracking other similar ones in #51801 and #51830 and more).

Reduced from libsyntax::parser::parser::parse_dot_or_call_expr_with. Probably not exactly minimal, but smaller than the whole parser :)

Repro here on the playground

Activity

  1. lqd
    added
    A-NLLArea: Non-lexical lifetimes (NLL)
    NLL-diagnosticsWorking towards the "diagnostic parity" goal
    on Jun 29, 2018
  2. matthewjasper
    added
    WG-compiler-nll
    on Jun 29, 2018
  3. nikomatsakis
    added this to the Rust 2018 Preview 2 milestone on Jun 29, 2018
  4. nikomatsakis
    added
    NLL-deferred
    on Jun 29, 2018

  5. nikomatsakis commented on Jun 29, 2018

    @nikomatsakis
    nikomatsakis
    on Jun 29, 2018
    Contributor

    Tagging as NLL-deferred because #51918 has precedence

  6. nikomatsakis
    added
    NLL-deferred
    and removed
    NLL-deferred
    NLL-diagnosticsWorking towards the "diagnostic parity" goal
    on Jun 29, 2018
  7. nikomatsakis
    assigned
    matthewjasper
    on Jul 2, 2018
  8. jkordish
    added
    C-enhancementCategory: An issue proposing an enhancement or a PR with one.
    T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.
    on Jul 3, 2018
  9. bors
    added a commit that references this issue on Jul 5, 2018

    Auto merge of #51964 - matthewjasper:unused-mut-mir-generation, r=nik…

    b51ca20
  10. bors
    closed this as completedin #51964on Jul 5, 2018
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A-NLLArea: Non-lexical lifetimes (NLL)C-enhancementCategory: An issue proposing an enhancement or a PR with one.T-compilerRelevant to the compiler team, which will review and decide on the PR/issue.

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