[INFO] fetching crate u-plus 1.0.0...
[INFO] building u-plus-1.0.0 against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2
[INFO] extracting crate u-plus 1.0.0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate u-plus 1.0.0
[INFO] finished tweaking crates.io crate u-plus 1.0.0
[INFO] tweaked toml for crates.io crate u-plus 1.0.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate u-plus 1.0.0 on toolchain c7f6aa2869acdbf014d094c6e427e554e160b6db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 50f7e4d78a290b67157f78a9d0e7e8ef5e10d6815f960d294374f8c1356af99a
[INFO] running `Command { std: "docker" "start" "-a" "50f7e4d78a290b67157f78a9d0e7e8ef5e10d6815f960d294374f8c1356af99a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "50f7e4d78a290b67157f78a9d0e7e8ef5e10d6815f960d294374f8c1356af99a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50f7e4d78a290b67157f78a9d0e7e8ef5e10d6815f960d294374f8c1356af99a", kill_on_drop: false }`
[INFO] [stdout] 50f7e4d78a290b67157f78a9d0e7e8ef5e10d6815f960d294374f8c1356af99a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f93cf89e08c096ef7e68c8ac5af25e887b450a24ba117d375866f7fa8c8f0c19
[INFO] running `Command { std: "docker" "start" "-a" "f93cf89e08c096ef7e68c8ac5af25e887b450a24ba117d375866f7fa8c8f0c19", kill_on_drop: false }`
[INFO] [stderr]    Compiling u-plus v1.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0658]: use of unstable const library feature `const_ops`
[INFO] [stdout]   --> src/lib.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | impl const Add<u32> for U {
[INFO] [stdout]    |            ^^^^^^^^ trait is not stable as const yet
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #143802 <https://github.com/rust-lang/rust/issues/143802> for more information
[INFO] [stdout]    = help: add `#![feature(const_ops)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2025-09-28; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable const library feature `const_ops`
[INFO] [stdout]   --> src/lib.rs:26:12
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl const Add<f32> for U {
[INFO] [stdout]    |            ^^^^^^^^ trait is not stable as const yet
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #143802 <https://github.com/rust-lang/rust/issues/143802> for more information
[INFO] [stdout]    = help: add `#![feature(const_ops)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2025-09-28; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable const library feature `const_ops`
[INFO] [stdout]   --> src/lib.rs:43:12
[INFO] [stdout]    |
[INFO] [stdout] 43 | impl const Add<f64> for U {
[INFO] [stdout]    |            ^^^^^^^^ trait is not stable as const yet
[INFO] [stdout]    |
[INFO] [stdout]    = note: see issue #143802 <https://github.com/rust-lang/rust/issues/143802> for more information
[INFO] [stdout]    = help: add `#![feature(const_ops)]` to the crate attributes to enable
[INFO] [stdout]    = note: this compiler was built on 2025-09-28; consider upgrading it if it is out of date
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `const_fn_floating_point_arithmetic` has been stable since 1.82.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:2:64
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(const_trait_impl, const_char_convert, const_option, const_fn_floating_point_arithmetic)]
[INFO] [stdout]   |                                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `const_char_convert` has been stable since 1.67.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:2:30
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(const_trait_impl, const_char_convert, const_option, const_fn_floating_point_arithmetic)]
[INFO] [stdout]   |                              ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `const_option` has been stable since 1.83.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:2:50
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(const_trait_impl, const_char_convert, const_option, const_fn_floating_point_arithmetic)]
[INFO] [stdout]   |                                                  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0658`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `u-plus` (lib) due to 3 previous errors; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "f93cf89e08c096ef7e68c8ac5af25e887b450a24ba117d375866f7fa8c8f0c19", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f93cf89e08c096ef7e68c8ac5af25e887b450a24ba117d375866f7fa8c8f0c19", kill_on_drop: false }`
[INFO] [stdout] f93cf89e08c096ef7e68c8ac5af25e887b450a24ba117d375866f7fa8c8f0c19