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[nll] use NLL during bootstrapping #53172

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nikomatsakis opened this issue Aug 7, 2018 · 3 comments
Closed
49 of 53 tasks

[nll] use NLL during bootstrapping #53172

nikomatsakis opened this issue Aug 7, 2018 · 3 comments
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A-NLL Area: Non Lexical Lifetimes (NLL) NLL-complete Working towards the "valid code works" goal T-compiler Relevant to the compiler team, which will review and decide on the PR/issue.
Milestone
Rust 2018 RC

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@nikomatsakis
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nikomatsakis commented Aug 7, 2018 •
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An important correctness milestone is to have the compiler itself use NLL when bootstrapping. We've made some stabs at this but we need to start doing it all the time.

Instructions

  • Log into Zulip and head to correct thread to say hi =)
  • Select a crate from the list below
  • Leave a comment that you are trying it
  • Verify that ./x.py build --stage 1 works for you
  • Add #![cfg_attr(not(stage0), feature(nll))] to the lib.rs file
    • This incantation adds #![feature(nll)], but only once we get to stage1 -- otherwise we'd be using the beta version of NLL, which is old and buggy.)
  • Try ./x.py build --stage 1 again and see if it works
  • If so, open a PR

Crate list
@nikomatsakis nikomatsakis added T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. A-NLL Area: Non Lexical Lifetimes (NLL) WG-compiler-nll NLL-complete Working towards the "valid code works" goal labels Aug 7, 2018
@nikomatsakis nikomatsakis added this to the Rust 2018 RC milestone Aug 7, 2018
@lovesegfault
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lovesegfault commented Aug 7, 2018 •
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I'm going to be attempting this for librustc_mir just to start.

This was referenced Aug 9, 2018
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@nikomatsakis nikomatsakis mentioned this issue Aug 9, 2018
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kennytm added a commit to kennytm/rust that referenced this issue Aug 9, 2018
@kennytm
Rollup merge of rust-lang#53211 - memoryruins:nll_bootstrap, r=nikoma…
bb0151c 
…tsakis

[nll] enable feature(nll) on various crates for bootstrap

rust-lang#53172
kennytm added a commit to kennytm/rust that referenced this issue Aug 9, 2018
@kennytm
Rollup merge of rust-lang#53214 - memoryruins:nll_bootstrap_2, r=niko…
62d70c9 
…matsakis

[nll] enable feature(nll) on various crates for bootstrap: part 2

rust-lang#53172
kennytm added a commit to kennytm/rust that referenced this issue Aug 9, 2018
@kennytm
Rollup merge of rust-lang#53219 - memoryruins:nll_bootstrap_3, r=niko…
e2d0e3f 
…matsakis

[nll] enable feature(nll) on various crates for bootstrap: part 3

rust-lang#53172
@memoryruins memoryruins mentioned this issue Aug 9, 2018
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@matthewjasper matthewjasper mentioned this issue Aug 9, 2018
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kennytm added a commit to kennytm/rust that referenced this issue Aug 11, 2018
@kennytm
Rollup merge of rust-lang#53230 - memoryruins:nll_bootstrap_4, r=niko…
1bd57e2 
…matsakis

[nll] enable feature(nll) on various crates for bootstrap: part 4

rust-lang#53172
GuillaumeGomez added a commit to GuillaumeGomez/rust that referenced this issue Aug 12, 2018
@GuillaumeGomez
Rollup merge of rust-lang#53230 - memoryruins:nll_bootstrap_4, r=niko…
3e9a1a1 
…matsakis

[nll] enable feature(nll) on various crates for bootstrap: part 4

rust-lang#53172

r? @nikomatsakis
@pnkfelix
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The remaining four crates:

  • liblibc
  • libbacktrace
  • libcompiler_builtins
  • stdsimd

are all "external dependencies", in the sense that they are crates that have been factored out and are hosted on separate repositories (still within the rust-lang or rust-lang-nursery ecosystems).

So, it seems like the vast majority of work here is done, and the important thing is: It seems clear that we can bootstrap ourselves using NLL.

Therefore, I am closing this task as "effectively finished"

@memoryruins
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memoryruins commented Aug 14, 2018 •
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Note: locally, libcompiler_builtins successfully built with NLL. I expect stdsimd and any others would too.

Well done, everyone :)

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