[INFO] fetching crate hamiltonian 0.0.1... [INFO] checking hamiltonian-0.0.1 against try#c659ee110de67e82444e4b6c8407c1a9af9c2cf6 for pr-145608-1 [INFO] extracting crate hamiltonian 0.0.1 into /workspace/builds/worker-4-tc2/source [INFO] started tweaking crates.io crate hamiltonian 0.0.1 [INFO] finished tweaking crates.io crate hamiltonian 0.0.1 [INFO] tweaked toml for crates.io crate hamiltonian 0.0.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate hamiltonian 0.0.1 on toolchain c659ee110de67e82444e4b6c8407c1a9af9c2cf6 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "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" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 16 packages to latest compatible versions [INFO] [stderr] Adding itertools v0.10.5 (available: v0.14.0) [INFO] [stderr] Adding rand v0.8.5 (available: v0.9.2) [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 2ce5010289e506ea5cf8a88dc0d89d0a0aedd414ccc500eee1450a2a0f8a786e [INFO] running `Command { std: "docker" "start" "-a" "2ce5010289e506ea5cf8a88dc0d89d0a0aedd414ccc500eee1450a2a0f8a786e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "2ce5010289e506ea5cf8a88dc0d89d0a0aedd414ccc500eee1450a2a0f8a786e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "2ce5010289e506ea5cf8a88dc0d89d0a0aedd414ccc500eee1450a2a0f8a786e", kill_on_drop: false }` [INFO] [stdout] 2ce5010289e506ea5cf8a88dc0d89d0a0aedd414ccc500eee1450a2a0f8a786e [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+c659ee110de67e82444e4b6c8407c1a9af9c2cf6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] f5bd712c40c4362ea13860ce9c2753dfcf5d161de0ba37407e070380fed9447c [INFO] running `Command { std: "docker" "start" "-a" "f5bd712c40c4362ea13860ce9c2753dfcf5d161de0ba37407e070380fed9447c", kill_on_drop: false }` [INFO] [stderr] Checking rand v0.8.5 [INFO] [stderr] Checking hamiltonian v0.0.1 (/opt/rustwide/workdir) [INFO] [stdout] error[E0557]: feature has been removed [INFO] [stdout] --> src/lib.rs:1:12 [INFO] [stdout] | [INFO] [stdout] 1 | #![feature(generators)] [INFO] [stdout] | ^^^^^^^^^^ feature has been removed [INFO] [stdout] | [INFO] [stdout] = note: removed in 1.75.0; see for more information [INFO] [stdout] = note: renamed to `coroutines` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0432]: unresolved import `std::iter::from_generator` [INFO] [stdout] --> src/lib.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | use std::iter::from_generator; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ no `from_generator` in `iter` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] error: could not compile `hamiltonian` (lib test) due to 6 previous errors [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stdout] error[E0658]: yield syntax is experimental [INFO] [stdout] --> src/lib.rs:26:17 [INFO] [stdout] | [INFO] [stdout] 26 | yield path; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #43122 for more information [INFO] [stdout] = help: add `#![feature(yield_expr)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2025-08-19; consider upgrading it if it is out of date [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: yield syntax is experimental [INFO] [stdout] --> src/lib.rs:26:17 [INFO] [stdout] | [INFO] [stdout] 26 | yield path; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #43122 for more information [INFO] [stdout] = help: add `#![feature(yield_expr)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2025-08-19; consider upgrading it if it is out of date [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: `yield` can only be used in `#[coroutine]` closures, or `gen` blocks [INFO] [stdout] --> src/lib.rs:26:17 [INFO] [stdout] | [INFO] [stdout] 26 | yield path; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] help: use `#[coroutine]` to make this closure a coroutine [INFO] [stdout] | [INFO] [stdout] 23 | from_generator(#[coroutine] move || { [INFO] [stdout] | ++++++++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0635]: unknown feature `iter_from_generator` [INFO] [stdout] --> src/lib.rs:2:12 [INFO] [stdout] | [INFO] [stdout] 2 | #![feature(iter_from_generator)] [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0557]: feature has been removed [INFO] [stdout] --> src/lib.rs:1:12 [INFO] [stdout] | [INFO] [stdout] 1 | #![feature(generators)] [INFO] [stdout] | ^^^^^^^^^^ feature has been removed [INFO] [stdout] | [INFO] [stdout] = note: removed in 1.75.0; see for more information [INFO] [stdout] = note: renamed to `coroutines` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] Some errors have detailed explanations: E0432, E0557, E0635, E0658. [INFO] [stdout] [INFO] [stdout] For more information about an error, try `rustc --explain E0432`. [INFO] [stdout] [INFO] [stdout] error[E0432]: unresolved import `std::iter::from_generator` [INFO] [stdout] --> src/lib.rs:4:5 [INFO] [stdout] | [INFO] [stdout] 4 | use std::iter::from_generator; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ no `from_generator` in `iter` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: yield syntax is experimental [INFO] [stdout] --> src/lib.rs:26:17 [INFO] [stdout] | [INFO] [stdout] 26 | yield path; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #43122 for more information [INFO] [stdout] = help: add `#![feature(yield_expr)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2025-08-19; consider upgrading it if it is out of date [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0658]: yield syntax is experimental [INFO] [stdout] --> src/lib.rs:26:17 [INFO] [stdout] | [INFO] [stdout] 26 | yield path; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: see issue #43122 for more information [INFO] [stdout] = help: add `#![feature(yield_expr)]` to the crate attributes to enable [INFO] [stdout] = note: this compiler was built on 2025-08-19; consider upgrading it if it is out of date [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error: `yield` can only be used in `#[coroutine]` closures, or `gen` blocks [INFO] [stdout] --> src/lib.rs:26:17 [INFO] [stdout] | [INFO] [stdout] 26 | yield path; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] help: use `#[coroutine]` to make this closure a coroutine [INFO] [stdout] | [INFO] [stdout] 23 | from_generator(#[coroutine] move || { [INFO] [stdout] | ++++++++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0635]: unknown feature `iter_from_generator` [INFO] [stdout] --> src/lib.rs:2:12 [INFO] [stdout] | [INFO] [stdout] 2 | #![feature(iter_from_generator)] [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] Some errors have detailed explanations: E0432, E0557, E0635, E0658. [INFO] [stdout] [INFO] [stderr] error: could not compile `hamiltonian` (lib) due to 6 previous errors [INFO] [stdout] For more information about an error, try `rustc --explain E0432`. [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "f5bd712c40c4362ea13860ce9c2753dfcf5d161de0ba37407e070380fed9447c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f5bd712c40c4362ea13860ce9c2753dfcf5d161de0ba37407e070380fed9447c", kill_on_drop: false }` [INFO] [stdout] f5bd712c40c4362ea13860ce9c2753dfcf5d161de0ba37407e070380fed9447c