[DO NOT MERGE] bootstrap with -Znext-solver=globally

[lcnr]

A revival of #124812.

Current status:

./x.py b --stage 2 passes 🎉

try builds succeed 🎉 🎉 🎉

first perf run 👻

in-flight changes

• ce66d92 is a rebased version of add a normalizes-to fast path #125334, unsure whether I actually want to land this PR for now
• propagate opaque types to the typeck root #135445
• https://github.com/lcnr/rust/tree/opaque-type-method-call support method calls on not-yet defined opaque types in their defining scope ☠️

r? @ghost

[compiler-errors]

@bors try

[bors]

⌛ Trying commit f631ca8 with merge ca04381...

[compiler-errors]

I also pushed:

• Deeply normalize when computing implied outlives bounds #133517
• Structurally resolve before checking ! in HIR typeck #133518
• Check xform_ret_ty for WF in the new solver to improve method winnowing #133519
• Structurally resolve before applying projection in borrowck #133520
• Structurally resolve before matching on type of projection #133521
• Cache in DeepRejectCtxt #133524

I think this is sufficient to make the compiler build, or at least ./x.py build --stage=2 completes successfully on my local branch.

[bors]

💔 Test failed - checks-actions

[bors]

☔ The latest upstream changes (presumably #133527) made this pull request unmergeable. Please resolve the merge conflicts.

[lqd]

Next failure is on color-print-proc-macro-0.3.6 while building cargo.

pub fn repro() -> impl FnMut() {
    if true {
        || ()
    } else {
        || ()
    }
}

godbolt

[compiler-errors]

@bors try

[bors]

⌛ Trying commit 6210ed3 with merge ac5ccad...

[bors]

💔 Test failed - checks-actions

[compiler-errors]

@bors try

[bors]

⌛ Trying commit 8fa8f40 with merge 550ae0d...

[lqd]

I was reducing the new failure but you've already fixed it ^^

[bors]

☔ The latest upstream changes (presumably #133865) made this pull request unmergeable. Please resolve the merge conflicts.

[bors]

☔ The latest upstream changes (presumably #134492) made this pull request unmergeable. Please resolve the merge conflicts.

[bors]

☔ The latest upstream changes (presumably #135615) made this pull request unmergeable. Please resolve the merge conflicts.

[lcnr]

@bors try

[bors]

⌛ Trying commit eb842ab with merge 1e9a398...

[rust-log-analyzer]

The job x86_64-gnu-llvm-18 failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

#21 exporting to docker image format
#21 sending tarball 28.2s done
#21 DONE 31.3s
##[endgroup]
Setting extra environment values for docker:  --env ENABLE_GCC_CODEGEN=1 --env GCC_EXEC_PREFIX=/usr/lib/gcc/
[CI_JOB_NAME=x86_64-gnu-llvm-18]
debug: `DISABLE_CI_RUSTC_IF_INCOMPATIBLE` configured.
---
sccache: Starting the server...
##[group]Configure the build
configure: processing command line
configure: 
configure: build.configure-args := ['--build=x86_64-unknown-linux-gnu', '--llvm-root=/usr/lib/llvm-18', '--enable-llvm-link-shared', '--set', 'rust.randomize-layout=true', '--set', 'rust.thin-lto-import-instr-limit=10', '--enable-verbose-configure', '--enable-sccache', '--disable-manage-submodules', '--enable-locked-deps', '--enable-cargo-native-static', '--set', 'rust.codegen-units-std=1', '--set', 'dist.compression-profile=balanced', '--dist-compression-formats=xz', '--set', 'rust.lld=false', '--disable-dist-src', '--release-channel=nightly', '--enable-debug-assertions', '--enable-overflow-checks', '--enable-llvm-assertions', '--set', 'rust.verify-llvm-ir', '--set', 'rust.codegen-backends=llvm,cranelift,gcc', '--set', 'llvm.static-libstdcpp', '--enable-new-symbol-mangling']
configure: target.x86_64-unknown-linux-gnu.llvm-config := /usr/lib/llvm-18/bin/llvm-config
configure: llvm.link-shared     := True
configure: rust.randomize-layout := True
configure: rust.thin-lto-import-instr-limit := 10
---
   Compiling rustc_codegen_llvm v0.0.0 (/checkout/compiler/rustc_codegen_llvm)
error: unused variable: `key`
   --> compiler/rustc_hir_typeck/src/method/probe.rs:717:14
    |
717 |         for (key, hidden_ty) in &opaque_types {
    |              ^^^ help: if this is intentional, prefix it with an underscore: `_key`
    = note: `-D unused-variables` implied by `-D warnings`
    = help: to override `-D warnings` add `#[allow(unused_variables)]`

   Compiling rustc_borrowck v0.0.0 (/checkout/compiler/rustc_borrowck)
   Compiling rustc_borrowck v0.0.0 (/checkout/compiler/rustc_borrowck)
error: unused import: `Obligation`
  --> compiler/rustc_borrowck/src/type_check/mod.rs:22:27
   |
22 | use rustc_infer::traits::{Obligation, ObligationCause, PredicateObligations};
   |
   = note: `-D unused-imports` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(unused_imports)]`


error: could not compile `rustc_hir_typeck` (lib) due to 1 previous error
warning: build failed, waiting for other jobs to finish...
error: unused variable: `fr_fn_body`
  --> compiler/rustc_borrowck/src/type_check/opaque_types.rs:47:9
   |
47 |     let fr_fn_body = ty::Region::new_var(
   |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_fr_fn_body`
   = note: `-D unused-variables` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(unused_variables)]`

error: could not compile `rustc_borrowck` (lib) due to 2 previous errors

[rust-log-analyzer]

The job dist-x86_64-linux failed! Check out the build log: (web) (plain)

Click to see the possible cause of the failure (guessed by this bot)

file:.git/config remote.origin.url=https://github.com/rust-lang-ci/rust
file:.git/config remote.origin.fetch=+refs/heads/*:refs/remotes/origin/*
file:.git/config gc.auto=0
file:.git/config http.https://github.com/.extraheader=AUTHORIZATION: basic ***
file:.git/config branch.try.remote=origin
file:.git/config branch.try.merge=refs/heads/try
file:.git/config remote.upstream.fetch=+refs/heads/*:refs/remotes/upstream/*
file:.git/config submodule.library/backtrace.active=true
file:.git/config submodule.library/backtrace.url=https://github.com/rust-lang/backtrace-rs.git
file:.git/config submodule.library/stdarch.active=true
---
   Compiling rustc_borrowck v0.0.0 (/checkout/compiler/rustc_borrowck)
error: unused import: `Obligation`
  --> compiler/rustc_borrowck/src/type_check/mod.rs:22:27
   |
22 | use rustc_infer::traits::{Obligation, ObligationCause, PredicateObligations};
   |
   = note: `-D unused-imports` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(unused_imports)]`


   Compiling rustc_privacy v0.0.0 (/checkout/compiler/rustc_privacy)
   Compiling rustc_passes v0.0.0 (/checkout/compiler/rustc_passes)
[RUSTC-TIMING] rustc_sanitizers test:false 4.263
   Compiling rustc_mir_build v0.0.0 (/checkout/compiler/rustc_mir_build)
error: unused variable: `fr_fn_body`
  --> compiler/rustc_borrowck/src/type_check/opaque_types.rs:47:9
   |
47 |     let fr_fn_body = ty::Region::new_var(
   |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_fr_fn_body`
   = note: `-D unused-variables` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(unused_variables)]`

[RUSTC-TIMING] rustc_privacy test:false 3.963
---
Caused by:
    Command RUST_BACKTRACE=full python3 /checkout/x.py build --target x86_64-unknown-linux-gnu --host x86_64-unknown-linux-gnu --stage 2 library/std --rust-profile-generate /tmp/tmp-multistage/opt-artifacts/rustc-pgo --set llvm.thin-lto=false --set llvm.link-shared=true [at /checkout/obj] has failed with exit code Some(1)

Stack backtrace:
   0: <anyhow::Error>::msg::<alloc::string::String>
             at /rust/deps/anyhow-1.0.95/src/backtrace.rs:27:14
   1: <opt_dist::exec::CmdBuilder>::run
             at /rustc/1e9a3982b32a55982d30bb45d13422abc475b466/src/tools/opt-dist/src/exec.rs:80:17
   2: <opt_dist::exec::Bootstrap>::run
             at /rustc/1e9a3982b32a55982d30bb45d13422abc475b466/src/tools/opt-dist/src/exec.rs:181:9
             at /rustc/1e9a3982b32a55982d30bb45d13422abc475b466/src/tools/opt-dist/src/main.rs:238:13
             at /rustc/1e9a3982b32a55982d30bb45d13422abc475b466/src/tools/opt-dist/src/main.rs:238:13
   4: <opt_dist::timer::TimerSection>::section::<opt_dist::execute_pipeline::{closure#1}::{closure#0}, ()>
             at /rustc/1e9a3982b32a55982d30bb45d13422abc475b466/src/tools/opt-dist/src/timer.rs:111:22
             at /rustc/1e9a3982b32a55982d30bb45d13422abc475b466/src/tools/opt-dist/src/main.rs:227:9
             at /rustc/1e9a3982b32a55982d30bb45d13422abc475b466/src/tools/opt-dist/src/main.rs:227:9
   6: <opt_dist::timer::TimerSection>::section::<opt_dist::execute_pipeline::{closure#1}, opt_dist::training::RustcPGOProfile>
             at /rustc/1e9a3982b32a55982d30bb45d13422abc475b466/src/tools/opt-dist/src/timer.rs:111:22
             at /rustc/1e9a3982b32a55982d30bb45d13422abc475b466/src/tools/opt-dist/src/main.rs:224:29
   8: opt_dist::main
             at /rustc/1e9a3982b32a55982d30bb45d13422abc475b466/src/tools/opt-dist/src/main.rs:415:18
   9: <fn() -> core::result::Result<(), anyhow::Error> as core::ops::function::FnOnce<()>>::call_once
   9: <fn() -> core::result::Result<(), anyhow::Error> as core::ops::function::FnOnce<()>>::call_once
             at /rustc/e30eefff41038ceea427009023627d6d66b36715/library/core/src/ops/function.rs:250:5
  10: std::sys::backtrace::__rust_begin_short_backtrace::<fn() -> core::result::Result<(), anyhow::Error>, core::result::Result<(), anyhow::Error>>
             at /rustc/e30eefff41038ceea427009023627d6d66b36715/library/std/src/sys/backtrace.rs:152:18
  11: std::rt::lang_start::<core::result::Result<(), anyhow::Error>>::{closure#0}
             at /rustc/e30eefff41038ceea427009023627d6d66b36715/library/std/src/rt.rs:195:18
  12: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once
             at /rustc/e30eefff41038ceea427009023627d6d66b36715/library/core/src/ops/function.rs:284:13
             at /rustc/e30eefff41038ceea427009023627d6d66b36715/library/std/src/panicking.rs:584:40
  14: std::panicking::try
             at /rustc/e30eefff41038ceea427009023627d6d66b36715/library/std/src/panicking.rs:547:19
  15: std::panic::catch_unwind

[bors]

💔 Test failed - checks-actions

[bors]

☔ The latest upstream changes (presumably #136085) made this pull request unmergeable. Please resolve the merge conflicts.