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Nightly 2019-12-29 causes reached the type-length limit error in previously working code #67757

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sdroege opened this issue Dec 31, 2019 · 3 comments
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A-async-await Area: Async & Await AsyncAwait-Triaged Async-await issues that have been triaged during a working group meeting. C-bug Category: This is a bug. P-high High priority regression-from-stable-to-nightly Performance or correctness regression from stable to nightly. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.

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@sdroege
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sdroege commented Dec 31, 2019

cargo bisect-rustc considers 3a087ad the culprit.

Can be reproduced on https://github.com/sdroege/async-tungstenite by running cargo test:

error: reached the type-length limit while instantiating `std::thread::LocalKey::<std::cel...ure::Future, ()}]>, ()}]>]], ()>`
    |
    = note: consider adding a `#![type_length_limit="1364215"]` attribute to your crate

error: aborting due to previous error

error: could not compile `async-tungstenite`.
warning: build failed, waiting for other jobs to finish...
error: reached the type-length limit while instantiating `async_task::utils::abort_on_pani..., async_std::task::task::Task>]>`
  --> /home/slomo/.cargo/registry/src/github.com-1ecc6299db9ec823/async-task-1.1.1/src/utils.rs:8:1
   |
8  | / pub(crate) fn abort_on_panic<T>(f: impl FnOnce() -> T) -> T {
9  | |     struct Bomb;
10 | |
11 | |     impl Drop for Bomb {
...  |
20 | |     t
21 | | }
   | |_^
   |
   = note: consider adding a `#![type_length_limit="1363798"]` attribute to your crate

error: aborting due to previous error

error: could not compile `async-tungstenite`.
warning: build failed, waiting for other jobs to finish...
error: reached the type-length limit while instantiating `std::thread::LocalKey::<std::cel...::Message>>, ()}]>, ()}]>]], ()>`
    |
    = note: consider adding a `#![type_length_limit="1367031"]` attribute to your crate

error: aborting due to previous error

error: could not compile `async-tungstenite`.
@jonas-schievink
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Presumably due to #65244. cc @seanmonstar

@jonas-schievink jonas-schievink added C-bug Category: This is a bug. I-nominated regression-from-stable-to-nightly Performance or correctness regression from stable to nightly. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. A-async-await Area: Async & Await labels Dec 31, 2019
@pnkfelix
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pnkfelix commented Jan 2, 2020

triage: P-high. We may well revert PR #65244; see ongoing discussion in issue #67706

@pnkfelix pnkfelix added the P-high High priority label Jan 2, 2020
@tmandry
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tmandry commented Jan 7, 2020

Fixed by #67768.

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Labels
A-async-await Area: Async & Await AsyncAwait-Triaged Async-await issues that have been triaged during a working group meeting. C-bug Category: This is a bug. P-high High priority regression-from-stable-to-nightly Performance or correctness regression from stable to nightly. T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
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