[INFO] fetching crate exercism 0.1.9...
[INFO] building exercism-0.1.9 against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] extracting crate exercism 0.1.9 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate exercism 0.1.9 on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate exercism 0.1.9
[INFO] finished tweaking crates.io crate exercism 0.1.9
[INFO] tweaked toml for crates.io crate exercism 0.1.9 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate exercism 0.1.9 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6ec49a5494329b86bc2cd6ec40b2b03bb0878a395039200466253f2f2ec0cb2d
[INFO] running `Command { std: "docker" "start" "-a" "6ec49a5494329b86bc2cd6ec40b2b03bb0878a395039200466253f2f2ec0cb2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6ec49a5494329b86bc2cd6ec40b2b03bb0878a395039200466253f2f2ec0cb2d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6ec49a5494329b86bc2cd6ec40b2b03bb0878a395039200466253f2f2ec0cb2d", kill_on_drop: false }`
[INFO] [stdout] 6ec49a5494329b86bc2cd6ec40b2b03bb0878a395039200466253f2f2ec0cb2d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c19b434e7e0df38616b334399ff4aef4d4ac4911b04114ccc25d9a144c489973
[INFO] running `Command { std: "docker" "start" "-a" "c19b434e7e0df38616b334399ff4aef4d4ac4911b04114ccc25d9a144c489973", kill_on_drop: false }`
[INFO] [stderr]    Compiling exercism v0.1.9 (/opt/rustwide/workdir)
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]  --> src/alphametics.rs:6:25
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut iter = input.clone().split("==");
[INFO] [stdout]   |                         ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]   |
[INFO] [stdout]   = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]   = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.87s
[INFO] running `Command { std: "docker" "inspect" "c19b434e7e0df38616b334399ff4aef4d4ac4911b04114ccc25d9a144c489973", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c19b434e7e0df38616b334399ff4aef4d4ac4911b04114ccc25d9a144c489973", kill_on_drop: false }`
[INFO] [stdout] c19b434e7e0df38616b334399ff4aef4d4ac4911b04114ccc25d9a144c489973
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6b4210c487356a3e41067db4622b1a0c82868f820c5e874ad23245b2d17d89e8
[INFO] running `Command { std: "docker" "start" "-a" "6b4210c487356a3e41067db4622b1a0c82868f820c5e874ad23245b2d17d89e8", kill_on_drop: false }`
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]  --> src/alphametics.rs:6:25
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut iter = input.clone().split("==");
[INFO] [stdout]   |                         ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]   |
[INFO] [stdout]   = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]   = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling exercism v0.1.9 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unexpected `cfg` condition value: `grapheme`
[INFO] [stdout]   --> tests/reverse/mod.rs:57:7
[INFO] [stdout]    |
[INFO] [stdout] 57 | #[cfg(feature = "grapheme")]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]    |
[INFO] [stdout]    = note: no expected values for `feature`
[INFO] [stdout]    = help: consider adding `grapheme` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]    = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `big-primes`
[INFO] [stdout]   --> tests/diffie_hellman/mod.rs:57:7
[INFO] [stdout]    |
[INFO] [stdout] 57 | #[cfg(feature = "big-primes")]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]    |
[INFO] [stdout]    = note: no expected values for `feature`
[INFO] [stdout]    = help: consider adding `big-primes` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `big-primes`
[INFO] [stdout]   --> tests/diffie_hellman/mod.rs:59:7
[INFO] [stdout]    |
[INFO] [stdout] 59 | #[cfg(feature = "big-primes")]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]    |
[INFO] [stdout]    = note: no expected values for `feature`
[INFO] [stdout]    = help: consider adding `big-primes` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `big-primes`
[INFO] [stdout]   --> tests/diffie_hellman/mod.rs:61:7
[INFO] [stdout]    |
[INFO] [stdout] 61 | #[cfg(feature = "big-primes")]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]    |
[INFO] [stdout]    = note: no expected values for `feature`
[INFO] [stdout]    = help: consider adding `big-primes` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `big-primes`
[INFO] [stdout]   --> tests/diffie_hellman/mod.rs:63:7
[INFO] [stdout]    |
[INFO] [stdout] 63 | #[cfg(feature = "big-primes")]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]    |
[INFO] [stdout]    = note: no expected values for `feature`
[INFO] [stdout]    = help: consider adding `big-primes` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `big-primes`
[INFO] [stdout]   --> tests/diffie_hellman/mod.rs:67:7
[INFO] [stdout]    |
[INFO] [stdout] 67 | #[cfg(feature = "big-primes")]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]    |
[INFO] [stdout]    = note: no expected values for `feature`
[INFO] [stdout]    = help: consider adding `big-primes` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `big-primes`
[INFO] [stdout]   --> tests/diffie_hellman/mod.rs:77:7
[INFO] [stdout]    |
[INFO] [stdout] 77 | #[cfg(feature = "big-primes")]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]    |
[INFO] [stdout]    = note: no expected values for `feature`
[INFO] [stdout]    = help: consider adding `big-primes` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unexpected `cfg` condition value: `big-primes`
[INFO] [stdout]   --> tests/diffie_hellman/mod.rs:92:7
[INFO] [stdout]    |
[INFO] [stdout] 92 | #[cfg(feature = "big-primes")]
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^ help: remove the condition
[INFO] [stdout]    |
[INFO] [stdout]    = note: no expected values for `feature`
[INFO] [stdout]    = help: consider adding `big-primes` as a feature in `Cargo.toml`
[INFO] [stdout]    = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.clone()` on a reference in this situation does nothing
[INFO] [stdout]  --> src/alphametics.rs:6:25
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let mut iter = input.clone().split("==");
[INFO] [stdout]   |                         ^^^^^^^^ help: remove this redundant call
[INFO] [stdout]   |
[INFO] [stdout]   = note: the type `str` does not implement `Clone`, so calling `clone` on `&str` copies the reference, which does not do anything and can be removed
[INFO] [stdout]   = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.09s
[INFO] running `Command { std: "docker" "inspect" "6b4210c487356a3e41067db4622b1a0c82868f820c5e874ad23245b2d17d89e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6b4210c487356a3e41067db4622b1a0c82868f820c5e874ad23245b2d17d89e8", kill_on_drop: false }`
[INFO] [stdout] 6b4210c487356a3e41067db4622b1a0c82868f820c5e874ad23245b2d17d89e8