[INFO] fetching crate iterators_extended 0.2.0...
[INFO] checking iterators_extended-0.2.0 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate iterators_extended 0.2.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate iterators_extended 0.2.0
[INFO] finished tweaking crates.io crate iterators_extended 0.2.0
[INFO] tweaked toml for crates.io crate iterators_extended 0.2.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate iterators_extended 0.2.0 on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate iterators_extended 0.2.0 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" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c6c874b08bdf41d6fc6b2301c3701ddd9ab1aa14c50b84a0445ea86d060c6634
[INFO] running `Command { std: "docker" "start" "-a" "c6c874b08bdf41d6fc6b2301c3701ddd9ab1aa14c50b84a0445ea86d060c6634", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c6c874b08bdf41d6fc6b2301c3701ddd9ab1aa14c50b84a0445ea86d060c6634", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c6c874b08bdf41d6fc6b2301c3701ddd9ab1aa14c50b84a0445ea86d060c6634", kill_on_drop: false }`
[INFO] [stdout] c6c874b08bdf41d6fc6b2301c3701ddd9ab1aa14c50b84a0445ea86d060c6634
[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" "-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d4b3a500cb5f7594ec54c632cc75e83e8d281191ca527b3251d47a7e63e89182
[INFO] running `Command { std: "docker" "start" "-a" "d4b3a500cb5f7594ec54c632cc75e83e8d281191ca527b3251d47a7e63e89182", kill_on_drop: false }`
[INFO] [stderr]     Checking iterators_extended v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `InterleaveIterator` is never constructed
[INFO] [stdout]  --> src/interleave.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct InterleaveIterator<I, J> {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `IntoInterleaveIterator` is never used
[INFO] [stdout]   --> src/interleave.rs:27:7
[INFO] [stdout]    |
[INFO] [stdout] 27 | trait IntoInterleaveIterator: IntoIterator {
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `IntoLoggingIterator` is never used
[INFO] [stdout]   --> src/logging.rs:22:7
[INFO] [stdout]    |
[INFO] [stdout] 22 | trait IntoLoggingIterator {
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mapped`
[INFO] [stdout]    --> src/stateful_threaded.rs:203:13
[INFO] [stdout]     |
[INFO] [stdout] 203 |         let mapped = values
[INFO] [stdout]     |             ^^^^^^ help: if this is intentional, prefix it with an underscore: `_mapped`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "d4b3a500cb5f7594ec54c632cc75e83e8d281191ca527b3251d47a7e63e89182", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4b3a500cb5f7594ec54c632cc75e83e8d281191ca527b3251d47a7e63e89182", kill_on_drop: false }`
[INFO] [stdout] d4b3a500cb5f7594ec54c632cc75e83e8d281191ca527b3251d47a7e63e89182