[INFO] fetching crate head-tail-iter 1.1.0...
[INFO] testing head-tail-iter-1.1.0 against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-1
[INFO] extracting crate head-tail-iter 1.1.0 into /workspace/builds/worker-7-tc2/source
[INFO] started tweaking crates.io crate head-tail-iter 1.1.0
[INFO] finished tweaking crates.io crate head-tail-iter 1.1.0
[INFO] tweaked toml for crates.io crate head-tail-iter 1.1.0 written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate head-tail-iter 1.1.0 on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate head-tail-iter 1.1.0 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" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2f69fc7dd28a566864854f3891a47e4c7b4e13a304f17a02250de558871d9dbf
[INFO] running `Command { std: "docker" "start" "-a" "2f69fc7dd28a566864854f3891a47e4c7b4e13a304f17a02250de558871d9dbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f69fc7dd28a566864854f3891a47e4c7b4e13a304f17a02250de558871d9dbf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f69fc7dd28a566864854f3891a47e4c7b4e13a304f17a02250de558871d9dbf", kill_on_drop: false }`
[INFO] [stdout] 2f69fc7dd28a566864854f3891a47e4c7b4e13a304f17a02250de558871d9dbf
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dc56be14da294552644332c34548fc52ead9924ce7d777c8918c659e32cf172c
[INFO] running `Command { std: "docker" "start" "-a" "dc56be14da294552644332c34548fc52ead9924ce7d777c8918c659e32cf172c", kill_on_drop: false }`
[INFO] [stderr]    Compiling head-tail-iter v1.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "dc56be14da294552644332c34548fc52ead9924ce7d777c8918c659e32cf172c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dc56be14da294552644332c34548fc52ead9924ce7d777c8918c659e32cf172c", kill_on_drop: false }`
[INFO] [stdout] dc56be14da294552644332c34548fc52ead9924ce7d777c8918c659e32cf172c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9277ea2acb26bb431c89902c7ce74546505d5a61c37a3d3be9d15c79611bfd5b
[INFO] running `Command { std: "docker" "start" "-a" "9277ea2acb26bb431c89902c7ce74546505d5a61c37a3d3be9d15c79611bfd5b", kill_on_drop: false }`
[INFO] [stderr]    Compiling head-tail-iter v1.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "9277ea2acb26bb431c89902c7ce74546505d5a61c37a3d3be9d15c79611bfd5b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9277ea2acb26bb431c89902c7ce74546505d5a61c37a3d3be9d15c79611bfd5b", kill_on_drop: false }`
[INFO] [stdout] 9277ea2acb26bb431c89902c7ce74546505d5a61c37a3d3be9d15c79611bfd5b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 23371cb1dcc10df71789d0903b353daf7d6978107e4194c5f4e5b464990bb48a
[INFO] running `Command { std: "docker" "start" "-a" "23371cb1dcc10df71789d0903b353daf7d6978107e4194c5f4e5b464990bb48a", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/head_tail_iter-f6e518ba110628d5)
[INFO] [stdout] running 8 tests
[INFO] [stderr]    Doc-tests head_tail_iter
[INFO] [stdout] test tests::count ... ok
[INFO] [stdout] test tests::fused ... ok
[INFO] [stdout] test tests::from ... ok
[INFO] [stdout] test tests::size_hint_and_exact_size ... ok
[INFO] [stdout] test tests::last ... ok
[INFO] [stdout] test tests::len ... ok
[INFO] [stdout] test tests::nth ... ok
[INFO] [stdout] test tests::head_tail_pairs ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 5 tests
[INFO] [stdout] test src/lib.rs - HeadTailIterator::head_tail_pairs (line 121) ... ok
[INFO] [stdout] test src/lib.rs - HeadTailIter<'a,T>::remainder (line 45) ... ok
[INFO] [stdout] test src/lib.rs - (line 32) ... ok
[INFO] [stdout] test src/lib.rs - (line 16) ... ok
[INFO] [stdout] test src/lib.rs - HeadTailIter (line 19) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.38s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "23371cb1dcc10df71789d0903b353daf7d6978107e4194c5f4e5b464990bb48a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23371cb1dcc10df71789d0903b353daf7d6978107e4194c5f4e5b464990bb48a", kill_on_drop: false }`
[INFO] [stdout] 23371cb1dcc10df71789d0903b353daf7d6978107e4194c5f4e5b464990bb48a