[INFO] fetching crate alternating-iter 0.3.1...
[INFO] checking alternating-iter-0.3.1 against master#22572d0994593197593e2a1b7b18d720a9a349a7 for pr-126452-1
[INFO] extracting crate alternating-iter 0.3.1 into /workspace/builds/worker-5-tc1/source
[INFO] validating manifest of crates.io crate alternating-iter 0.3.1 on toolchain 22572d0994593197593e2a1b7b18d720a9a349a7
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate alternating-iter 0.3.1
[INFO] finished tweaking crates.io crate alternating-iter 0.3.1
[INFO] tweaked toml for crates.io crate alternating-iter 0.3.1 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "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" "+22572d0994593197593e2a1b7b18d720a9a349a7" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2ce19110dbbd66b5cdf3f8216ff1ed5730cd89fceb1276251e4cc7698ebd6058
[INFO] running `Command { std: "docker" "start" "-a" "2ce19110dbbd66b5cdf3f8216ff1ed5730cd89fceb1276251e4cc7698ebd6058", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2ce19110dbbd66b5cdf3f8216ff1ed5730cd89fceb1276251e4cc7698ebd6058", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2ce19110dbbd66b5cdf3f8216ff1ed5730cd89fceb1276251e4cc7698ebd6058", kill_on_drop: false }`
[INFO] [stdout] 2ce19110dbbd66b5cdf3f8216ff1ed5730cd89fceb1276251e4cc7698ebd6058
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+22572d0994593197593e2a1b7b18d720a9a349a7" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fe7b12d9c7596dc861a605fa66be7caa07156b99cb991207a69cf17c9500bb45
[INFO] running `Command { std: "docker" "start" "-a" "fe7b12d9c7596dc861a605fa66be7caa07156b99cb991207a69cf17c9500bb45", kill_on_drop: false }`
[INFO] [stderr]     Checking alternating-iter v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `core::iter`
[INFO] [stdout]  --> src/alternating.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::iter;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `Command { std: "docker" "inspect" "fe7b12d9c7596dc861a605fa66be7caa07156b99cb991207a69cf17c9500bb45", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe7b12d9c7596dc861a605fa66be7caa07156b99cb991207a69cf17c9500bb45", kill_on_drop: false }`
[INFO] [stdout] fe7b12d9c7596dc861a605fa66be7caa07156b99cb991207a69cf17c9500bb45
[INFO] checking alternating-iter-0.3.1 against try#6289438dbad80b1a0029c66dd3f6abf57c2c51be for pr-126452-1
[INFO] extracting crate alternating-iter 0.3.1 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate alternating-iter 0.3.1 on toolchain 6289438dbad80b1a0029c66dd3f6abf57c2c51be
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate alternating-iter 0.3.1
[INFO] finished tweaking crates.io crate alternating-iter 0.3.1
[INFO] tweaked toml for crates.io crate alternating-iter 0.3.1 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "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" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8c3c40be025a6122a7ac1d80b7d71d9256c9c17ceb463295e46a8abfc8aaf778
[INFO] running `Command { std: "docker" "start" "-a" "8c3c40be025a6122a7ac1d80b7d71d9256c9c17ceb463295e46a8abfc8aaf778", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c3c40be025a6122a7ac1d80b7d71d9256c9c17ceb463295e46a8abfc8aaf778", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c3c40be025a6122a7ac1d80b7d71d9256c9c17ceb463295e46a8abfc8aaf778", kill_on_drop: false }`
[INFO] [stdout] 8c3c40be025a6122a7ac1d80b7d71d9256c9c17ceb463295e46a8abfc8aaf778
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+6289438dbad80b1a0029c66dd3f6abf57c2c51be" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3bea5df429edcf92e5616b5141dc44fae1f37d5753fd03726a6bb97a200666e7
[INFO] running `Command { std: "docker" "start" "-a" "3bea5df429edcf92e5616b5141dc44fae1f37d5753fd03726a6bb97a200666e7", kill_on_drop: false }`
[INFO] [stderr]     Checking alternating-iter v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `core::iter`
[INFO] [stdout]  --> src/alternating.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use core::iter;
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "3bea5df429edcf92e5616b5141dc44fae1f37d5753fd03726a6bb97a200666e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3bea5df429edcf92e5616b5141dc44fae1f37d5753fd03726a6bb97a200666e7", kill_on_drop: false }`
[INFO] [stdout] 3bea5df429edcf92e5616b5141dc44fae1f37d5753fd03726a6bb97a200666e7