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[nothing to see here yet] Experiments #146421

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@rustbot rustbot added A-CI Area: Our Github Actions CI A-testsuite Area: The testsuite used to check the correctness of rustc S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-infra Relevant to the infrastructure team, which will review and decide on the PR/issue. labels Sep 10, 2025
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mati865 commented Sep 10, 2025

@bors try @rust-timer queue

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Awaiting bors try build completion.

@rustbot label: +S-waiting-on-perf

rust-bors bot added a commit that referenced this pull request Sep 10, 2025
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Auto merge of #146421 - mati865:experiments, r=<try>
0603a22 
[nothing to see here yet] Experiments
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@rustbot rustbot added the S-waiting-on-perf Status: Waiting on a perf run to be completed. label Sep 10, 2025
@mati865 mati865 added the S-experimental Status: Ongoing experiment that does not require reviewing and won't be merged in its current state. label Sep 10, 2025
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The job aarch64-gnu-llvm-19-2 failed! Check out the build log: (web) (plain enhanced) (plain)

Click to see the possible cause of the failure (guessed by this bot) 
[TIMING:end] tool::Tidy { compiler: Compiler { stage: 0, host: aarch64-unknown-linux-gnu, forced_compiler: false }, target: aarch64-unknown-linux-gnu } -- 0.000
fmt check
fmt: checked 6364 files
tidy check
tidy error: invalid source: "git+https://github.com/davidlattimore/wild?rev=35f1e6e#35f1e6ee7ee8859a8829a13daae81d2480958ac3"
tidy error: invalid source: "git+https://github.com/davidlattimore/wild?rev=35f1e6e#35f1e6ee7ee8859a8829a13daae81d2480958ac3"
tidy error: invalid source: "git+https://github.com/davidlattimore/wild?rev=35f1e6e#35f1e6ee7ee8859a8829a13daae81d2480958ac3"
tidy error: invalid source: "git+https://github.com/davidlattimore/wild?rev=35f1e6e#35f1e6ee7ee8859a8829a13daae81d2480958ac3"
tidy error: invalid license `Zlib` for package `registry+https://github.com/rust-lang/crates.io-index#libz-rs-sys@0.5.2` in workspace `.`
tidy error: invalid license `MIT/NCSA` for package `registry+https://github.com/rust-lang/crates.io-index#msvc-demangler@0.10.1` in workspace `.`
tidy error: invalid license `Zlib` for package `registry+https://github.com/rust-lang/crates.io-index#zlib-rs@0.5.2` in workspace `.`
tidy error: Dependency for . not explicitly permitted: registry+https://github.com/rust-lang/crates.io-index#libz-rs-sys@0.5.2
tidy error: Dependency for . not explicitly permitted: registry+https://github.com/rust-lang/crates.io-index#zlib-rs@0.5.2
Go to `src/tools/tidy/src/deps.rs:229` for the list.
tidy error: Dependency for . not explicitly permitted: registry+https://github.com/rust-lang/crates.io-index#rayon-core@1.13.0
tidy error: invalid license `Zlib` for package `registry+https://github.com/rust-lang/crates.io-index#libz-rs-sys@0.5.2` in workspace `src/tools/test-float-parse`
tidy error: invalid license `MIT/NCSA` for package `registry+https://github.com/rust-lang/crates.io-index#msvc-demangler@0.10.1` in workspace `src/tools/test-float-parse`
tidy error: invalid license `Zlib` for package `registry+https://github.com/rust-lang/crates.io-index#zlib-rs@0.5.2` in workspace `src/tools/test-float-parse`
Checking tidy rustdoc_json...
No error code explanation was removed!
tidy: Skipping binary file check, read-only filesystem
##[error]tidy error: /checkout/compiler/rustc_target/src/spec/mod.rs:130: TODO is used for tasks that should be done before merging a PR; If you want to leave a message in the codebase use FIXME
some tidy checks failed
Command `/checkout/obj/build/aarch64-unknown-linux-gnu/stage1-tools-bin/rust-tidy /checkout /checkout/obj/build/aarch64-unknown-linux-gnu/stage0/bin/cargo /checkout/obj/build 4 npm` failed with exit code 1
Created at: src/bootstrap/src/core/build_steps/tool.rs:1643:23
Executed at: src/bootstrap/src/core/build_steps/test.rs:1281:29

Command has failed. Rerun with -v to see more details.
Bootstrap failed while executing `--stage 2 test --skip tests --skip coverage-map --skip coverage-run --skip library --skip tidyselftest`
Build completed unsuccessfully in 0:00:53
  local time: Wed Sep 10 19:19:21 UTC 2025
  network time: Wed, 10 Sep 2025 19:24:01 GMT
##[error]Process completed with exit code 1.

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

Click to see the possible cause of the failure (guessed by this bot) 
#23 42.33 + cd clang-build
#23 42.33 + INC=/rustroot/include:/usr/include
#23 42.33 + GCC_PLUGIN_TARGET=x86_64-pc-linux-gnu
#23 42.33 + [[ x86_64-pc-linux-gnu == \i\6\8\6\-\p\c\-\l\i\n\u\x\-\g\n\u ]]
#23 42.33 + hide_output cmake ../llvm -DCMAKE_C_COMPILER=/rustroot/bin/gcc -DCMAKE_CXX_COMPILER=/rustroot/bin/g++ -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/rustroot -DCOMPILER_RT_BUILD_SANITIZERS=OFF -DCOMPILER_RT_BUILD_XRAY=OFF -DCOMPILER_RT_BUILD_MEMPROF=OFF -DCOMPILER_RT_BUILD_CTX_PROFILE=OFF -DLLVM_TARGETS_TO_BUILD=X86 -DLLVM_INCLUDE_BENCHMARKS=OFF -DLLVM_INCLUDE_TESTS=OFF -DLLVM_INCLUDE_EXAMPLES=OFF '-DLLVM_ENABLE_PROJECTS=clang;lld;bolt' -DLLVM_ENABLE_RUNTIMES=compiler-rt -DLLVM_BINUTILS_INCDIR=/rustroot/lib/gcc/x86_64-pc-linux-gnu/9.5.0/plugin/include/ '-DRUNTIMES_CMAKE_ARGS=-DCMAKE_CXX_FLAGS="--gcc-toolchain=/rustroot"' -DC_INCLUDE_DIRS=/rustroot/include:/usr/include
#23 51.10 ++ nproc
#23 51.10 + hide_output make -j36
#23 81.13 Wed Sep 10 19:59:05 UTC 2025 - building ...
#23 111.2 Wed Sep 10 19:59:35 UTC 2025 - building ...
#23 141.2 Wed Sep 10 20:00:05 UTC 2025 - building ...
---
   Compiling collector v0.1.0 (/tmp/tmp-multistage/opt-artifacts/rustc-perf/collector)
    Finished `dev` profile [unoptimized + debuginfo] target(s) in 31.30s
[2025-09-10T20:25:28.484Z INFO  opt_dist::timer] Section `Stage 1 (Rustc PGO)` starts
[2025-09-10T20:25:28.485Z INFO  opt_dist::timer] Section `Stage 1 (Rustc PGO) > Build PGO instrumented rustc and LLVM` starts
[2025-09-10T20:25:28.485Z INFO  opt_dist::exec] Executing `RUST_BACKTRACE=full python3 /checkout/x.py build --target x86_64-unknown-linux-gnu --host x86_64-unknown-linux-gnu --stage 2 library/std --set rust.llvm-bitcode-linker=false --set build.extended=false --set rust.codegen-backends=['llvm'] --set rust.deny-warnings=false --rust-profile-generate /tmp/tmp-multistage/opt-artifacts/rustc-pgo --set llvm.thin-lto=false --set llvm.link-shared=true [at /checkout/obj]`
##[endgroup]
Unknown option: -C
usage: git [--version] [--help] [-c name=value]
           [--exec-path[=<path>]] [--html-path] [--man-path] [--info-path]
           [-p|--paginate|--no-pager] [--no-replace-objects] [--bare]
---
[RUSTC-TIMING] colosseum test:false 0.101
   Compiling smallvec v1.15.1
[RUSTC-TIMING] sharded_offset_map test:false 0.133
[RUSTC-TIMING] bitflags test:false 0.319
   Compiling bumpalo-herd v0.1.2
[RUSTC-TIMING] sharded_vec_writer test:false 0.129
[RUSTC-TIMING] atomic_take test:false 0.068
[RUSTC-TIMING] bumpalo test:false 0.299
   Compiling rustc_version v0.4.1
[RUSTC-TIMING] thread_local test:false 0.320
---
[RUSTC-TIMING] miniz_oxide test:false 1.620
   Compiling rayon v1.11.0
[RUSTC-TIMING] jobserver test:false 0.725
[RUSTC-TIMING] itertools test:false 1.700
   Compiling linker-utils v0.5.0 (https://github.com/davidlattimore/wild?rev=35f1e6e#35f1e6ee)
[RUSTC-TIMING] symbolic_common test:false 0.517
[RUSTC-TIMING] msvc_demangler test:false 1.918
[RUSTC-TIMING] cc test:false 0.924
   Compiling zstd-sys v2.0.16+zstd.1.5.7
   Compiling blake3 v1.8.2
---
[RUSTC-TIMING] zstd test:false 0.271
[RUSTC-TIMING] serde test:false 2.221
   Compiling postcard v1.1.3
[RUSTC-TIMING] heapless test:false 0.471
   Compiling linker-layout v0.5.0 (https://github.com/davidlattimore/wild?rev=35f1e6e#35f1e6ee)
   Compiling linker-trace v0.5.0 (https://github.com/davidlattimore/wild?rev=35f1e6e#35f1e6ee)
[RUSTC-TIMING] postcard test:false 0.268
   Compiling libwild v0.5.0 (https://github.com/davidlattimore/wild?rev=35f1e6e#35f1e6ee)
[RUSTC-TIMING] tracing_subscriber test:false 4.228
[RUSTC-TIMING] linker_trace test:false 0.462
[RUSTC-TIMING] linker_layout test:false 0.603
[RUSTC-TIMING] libwild test:false 40.718
   Compiling wild-linker v0.1.0 (/checkout/src/tools/wild-linker)
---
[RUSTC-TIMING] rustc_query_impl test:false 142.094
[RUSTC-TIMING] rustc_hir_typeck test:false 104.917
error: linking with `cc` failed: exit status: 1
  |
  = note:  "cc" "-Wl,--version-script=/tmp/rustcA5Vs5m/list" "-Wl,--no-undefined-version" "<247 object files omitted>" "/tmp/rustcA5Vs5m/rmeta.o" "-Wl,-Bstatic" "/tmp/rustcA5Vs5m/{librustc_codegen_llvm-4d75ab23e9599f3c,librustc_llvm-aa1d8cc493ff34d1,libblake3-38b5251b1d90c80d,libpsm-a4a279b6dcf3cc9f,libprofiler_builtins-4eb88240dcdd94d8}.rlib" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcompiler_builtins-*.rlib" "-Wl,-Bdynamic" "-lLLVM-21-rust-1.91.0-nightly" "-ldl" "-lgcc_s" "-lutil" "-lrt" "-lpthread" "-lm" "-ldl" "-lc" "-L" "/tmp/rustcA5Vs5m/raw-dylibs" "-Wl,--eh-frame-hdr" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-rustc/x86_64-unknown-linux-gnu/release/build/psm-0cbb86151a978ec1/out" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-rustc/x86_64-unknown-linux-gnu/release/build/blake3-70cb3698b6ded6ab/out" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-rustc/x86_64-unknown-linux-gnu/release/build/rustc_llvm-169c0eb39634f734/out" "-L" "/checkout/obj/build/x86_64-unknown-linux-gnu/llvm/lib" "-L" "/rustroot/bin/../lib/gcc/x86_64-pc-linux-gnu/9.5.0/../../../../lib64" "-L" "<sysroot>/lib/rustlib/x86_64-unknown-linux-gnu/lib" "-o" "/checkout/obj/build/x86_64-unknown-linux-gnu/stage2-rustc/x86_64-unknown-linux-gnu/release/deps/librustc_driver-d600c098e5f316e5.so" "-shared" "-Wl,-soname=librustc_driver-d600c098e5f316e5.so" "-Wl,-z,relro,-z,now" "-nodefaultlibs" "-Wl,-z,origin" "-Wl,-rpath,$ORIGIN/../lib" "-Wl,--icf=all"
  = note: some arguments are omitted. use `--verbose` to show all linker arguments
  = note: /usr/bin/ld: unrecognized option '--icf=all'
          /usr/bin/ld: use the --help option for usage information
          collect2: error: ld returned 1 exit status
          

[RUSTC-TIMING] rustc_driver test:false 105.718
error: could not compile `rustc_driver` (lib) due to 1 previous error
Bootstrap failed while executing `build --target x86_64-unknown-linux-gnu --host x86_64-unknown-linux-gnu --stage 2 library/std --set rust.llvm-bitcode-linker=false --set build.extended=false --set rust.codegen-backends=['llvm'] --set rust.deny-warnings=false --rust-profile-generate /tmp/tmp-multistage/opt-artifacts/rustc-pgo --set llvm.thin-lto=false --set llvm.link-shared=true`
Build completed unsuccessfully in 0:16:20
[2025-09-10T20:41:48.905Z INFO  opt_dist::timer] Section `Stage 1 (Rustc PGO) > Build PGO instrumented rustc and LLVM` ended: FAIL (980.42s)`
[2025-09-10T20:41:48.906Z INFO  opt_dist::timer] Section `Stage 1 (Rustc PGO)` ended: FAIL (980.42s)`
[2025-09-10T20:41:48.906Z INFO  opt_dist] Timer results
    -----------------------------------------------------------------
---
[2025-09-10T20:41:48.906Z INFO  opt_dist::utils] Free disk space: 1.21 TiB out of total 2.18 TiB (44.56% used)
Error: Optimized build pipeline has failed

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 --set rust.llvm-bitcode-linker=false --set build.extended=false --set rust.codegen-backends=['llvm'] --set rust.deny-warnings=false --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-1.0.99/src/backtrace.rs:27:14
   1: <opt_dist::exec::CmdBuilder>::run
             at /rustc/0603a2211e9c87393bebbf60ba5a6e13e95fd7b6/src/tools/opt-dist/src/exec.rs:80:17
   2: <opt_dist::exec::Bootstrap>::run
             at /rustc/0603a2211e9c87393bebbf60ba5a6e13e95fd7b6/src/tools/opt-dist/src/exec.rs:199:18
   3: opt_dist::execute_pipeline::{closure#1}::{closure#0}
             at /rustc/0603a2211e9c87393bebbf60ba5a6e13e95fd7b6/src/tools/opt-dist/src/main.rs:256:21
   4: <opt_dist::timer::TimerSection>::section::<opt_dist::execute_pipeline::{closure#1}::{closure#0}, ()>
             at /rustc/0603a2211e9c87393bebbf60ba5a6e13e95fd7b6/src/tools/opt-dist/src/timer.rs:111:22
   5: opt_dist::execute_pipeline::{closure#1}
             at /rustc/0603a2211e9c87393bebbf60ba5a6e13e95fd7b6/src/tools/opt-dist/src/main.rs:245:15
   6: <opt_dist::timer::TimerSection>::section::<opt_dist::execute_pipeline::{closure#1}, opt_dist::training::RustcPGOProfile>
             at /rustc/0603a2211e9c87393bebbf60ba5a6e13e95fd7b6/src/tools/opt-dist/src/timer.rs:111:22
   7: opt_dist::execute_pipeline
             at /rustc/0603a2211e9c87393bebbf60ba5a6e13e95fd7b6/src/tools/opt-dist/src/main.rs:242:35
   8: opt_dist::main
             at /rustc/0603a2211e9c87393bebbf60ba5a6e13e95fd7b6/src/tools/opt-dist/src/main.rs:467:18
   9: <fn() -> core::result::Result<(), anyhow::Error> as core::ops::function::FnOnce<()>>::call_once
             at /rustc/788da80fcfcef3f34c90def5baa32813e39a1a41/library/core/src/ops/function.rs:253:5
  10: std::sys::backtrace::__rust_begin_short_backtrace::<fn() -> core::result::Result<(), anyhow::Error>, core::result::Result<(), anyhow::Error>>
             at /rustc/788da80fcfcef3f34c90def5baa32813e39a1a41/library/std/src/sys/backtrace.rs:158:18
  11: std::rt::lang_start::<core::result::Result<(), anyhow::Error>>::{closure#0}
             at /rustc/788da80fcfcef3f34c90def5baa32813e39a1a41/library/std/src/rt.rs:206:18
  12: core::ops::function::impls::<impl core::ops::function::FnOnce<A> for &F>::call_once
             at /rustc/788da80fcfcef3f34c90def5baa32813e39a1a41/library/core/src/ops/function.rs:290:21
  13: std::panicking::catch_unwind::do_call
             at /rustc/788da80fcfcef3f34c90def5baa32813e39a1a41/library/std/src/panicking.rs:589:40
  14: std::panicking::catch_unwind
             at /rustc/788da80fcfcef3f34c90def5baa32813e39a1a41/library/std/src/panicking.rs:552:19

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rust-bors bot commented Sep 10, 2025

💔 Test for 0603a22 failed: CI. Failed jobs:

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A-CI Area: Our Github Actions CI A-testsuite Area: The testsuite used to check the correctness of rustc S-experimental Status: Ongoing experiment that does not require reviewing and won't be merged in its current state. S-waiting-on-author Status: This is awaiting some action (such as code changes or more information) from the author. S-waiting-on-perf Status: Waiting on a perf run to be completed. T-bootstrap Relevant to the bootstrap subteam: Rust's build system (x.py and src/bootstrap) T-compiler Relevant to the compiler team, which will review and decide on the PR/issue. T-infra Relevant to the infrastructure team, which will review and decide on the PR/issue.
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