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Warn when RUST_LOG contains a name that isn't a valid path #2038

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Warn when RUST_LOG contains a name that isn't a valid path#2038
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A-runtimeArea: std's runtime and "pre-main" init for handling backtraces, unwinds, stack overflowsC-enhancementCategory: An issue proposing an enhancement or a PR with one.E-easyCall for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.

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@jdm
jdm
opened on Mar 21, 2012

I can't imagine any reason you would actually want a name that isn't a valid logging identifier.

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  1. catamorphism commented on Apr 19, 2012

    @catamorphism
    catamorphism
    on Apr 19, 2012
    Contributor

    Should be fixed as part of implementing #2033.

  2. bblum commented on Jun 21, 2013

    @bblum
    bblum
    on Jun 21, 2013
    Contributor

    That bug is now closed, but this is still an issue.

    The place to implement this in the old runtime is in update_log_settings. Not sure how the new runtime will deal with it.

  3. emberian commented on Aug 11, 2013

    @emberian
    emberian
    on Aug 11, 2013
    Contributor
    [16:02:15]~/hacking/rust/src/rt> RUST_LOG=foo rustc
warning: got 1 RUST_LOG specs but only matched 0 of them.
You may have mistyped a RUST_LOG spec.
Use RUST_LOG=::help to see the list of crates and modules.

    Closing.

  4. emberian
    closed this as completedon Aug 11, 2013

  5. bblum commented on Aug 11, 2013

    @bblum
    bblum
    on Aug 11, 2013
    Contributor

    Nice!

  6. bors
    added 11 commits that reference this issue on May 2, 2020

    Auto merge of rust-lang#5011 - JohnTitor:split-collapsible-if, r=flip…

    fdccfe7

    Auto merge of rust-lang#5030 - JohnTitor:split-missing-doc, r=phansch

    ab5de38

    Auto merge of rust-lang#5033 - JohnTitor:split-use-self, r=flip1995

    05cb0df

    Auto merge of rust-lang#5066 - JohnTitor:split-up-1447, r=llogiq

    f728bcd

    Auto merge of rust-lang#5068 - JohnTitor:split-up-transmute, r=phansch

    f78cc07

    Auto merge of rust-lang#5085 - JohnTitor:split-up-test, r=phansch

    c48594c

    Auto merge of rust-lang#5090 - JohnTitor:split-up-match-same-arms, r=…

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    Auto merge of rust-lang#5099 - JohnTitor:split-up-non-copy-const, r=f…

    5b42a76

    Auto merge of rust-lang#5108 - JohnTitor:split-up-0130, r=flip1995

    bbef531

    Auto merge of rust-lang#5120 - JohnTitor:split-up-drop-forget-ref, r=…

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    Auto merge of rust-lang#5130 - JohnTitor:split-up-index-slice, r=flip…

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  7. folkertdev
    added a commit that references this issue on Mar 3, 2026

    Merge pull request rust-lang#2038 from sayantn/sde-update

    c66d49f
  8. U007D
    added a commit that references this issue on Aug 21, 2026

    Auto merge of rust-lang#2038 - RalfJung:rustup, r=RalfJung

    d46b648
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    A-runtimeArea: std's runtime and "pre-main" init for handling backtraces, unwinds, stack overflowsC-enhancementCategory: An issue proposing an enhancement or a PR with one.E-easyCall for participation: Easy difficulty. Experience needed to fix: Not much. Good first issue.

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