[INFO] fetching crate chainlink 0.1.0...
[INFO] checking chainlink-0.1.0 against try#8de4b308b608cded0ebccf658a0fc719bce87d4e for pr-89056
[INFO] extracting crate chainlink 0.1.0 into /workspace/builds/worker-79/source
[INFO] validating manifest of crates.io crate chainlink 0.1.0 on toolchain 8de4b308b608cded0ebccf658a0fc719bce87d4e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate chainlink 0.1.0
[INFO] finished tweaking crates.io crate chainlink 0.1.0
[INFO] tweaked toml for crates.io crate chainlink 0.1.0 written to /workspace/builds/worker-79/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e28efcbcf13bd83e88df290a4c58a2d8c6ee3a31d256dc1387323ea31ef3671f
[INFO] running `Command { std: "docker" "start" "-a" "e28efcbcf13bd83e88df290a4c58a2d8c6ee3a31d256dc1387323ea31ef3671f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e28efcbcf13bd83e88df290a4c58a2d8c6ee3a31d256dc1387323ea31ef3671f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e28efcbcf13bd83e88df290a4c58a2d8c6ee3a31d256dc1387323ea31ef3671f", kill_on_drop: false }`
[INFO] [stdout] e28efcbcf13bd83e88df290a4c58a2d8c6ee3a31d256dc1387323ea31ef3671f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-79/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+8de4b308b608cded0ebccf658a0fc719bce87d4e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fc535aeeb3bda88847e70acbe33f65226e9340435d8812bc2ac923751dd28263
[INFO] running `Command { std: "docker" "start" "-a" "fc535aeeb3bda88847e70acbe33f65226e9340435d8812bc2ac923751dd28263", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking thunderdome v0.4.1
[INFO] [stderr]     Checking chainlink v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `list`
[INFO] [stdout]   --> src/iter_links.rs:58:5
[INFO] [stdout]    |
[INFO] [stdout] 58 |     list: &'a mut LinkedList<T>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `fwd_pos`
[INFO] [stdout]   --> src/iter_links.rs:59:5
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fwd_pos: Option<Index>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `rev_pos`
[INFO] [stdout]   --> src/iter_links.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 60 |     rev_pos: Option<Index>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `list`
[INFO] [stdout]   --> src/iter_links.rs:58:5
[INFO] [stdout]    |
[INFO] [stdout] 58 |     list: &'a mut LinkedList<T>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `fwd_pos`
[INFO] [stdout]   --> src/iter_links.rs:59:5
[INFO] [stdout]    |
[INFO] [stdout] 59 |     fwd_pos: Option<Index>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `rev_pos`
[INFO] [stdout]   --> src/iter_links.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 60 |     rev_pos: Option<Index>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.23s
[INFO] running `Command { std: "docker" "inspect" "fc535aeeb3bda88847e70acbe33f65226e9340435d8812bc2ac923751dd28263", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc535aeeb3bda88847e70acbe33f65226e9340435d8812bc2ac923751dd28263", kill_on_drop: false }`
[INFO] [stdout] fc535aeeb3bda88847e70acbe33f65226e9340435d8812bc2ac923751dd28263