[INFO] fetching crate chainlink 0.1.0...
[INFO] testing chainlink-0.1.0 against 1.60.0 for beta-1.61-1
[INFO] extracting crate chainlink 0.1.0 into /workspace/builds/worker-110/source
[INFO] validating manifest of crates.io crate chainlink 0.1.0 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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-110/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a0cf7bd6742f964901133105c7154eaa2a8073bb50cff4182b732f5548ce1b6f
[INFO] running `Command { std: "docker" "start" "-a" "a0cf7bd6742f964901133105c7154eaa2a8073bb50cff4182b732f5548ce1b6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a0cf7bd6742f964901133105c7154eaa2a8073bb50cff4182b732f5548ce1b6f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a0cf7bd6742f964901133105c7154eaa2a8073bb50cff4182b732f5548ce1b6f", kill_on_drop: false }`
[INFO] [stdout] a0cf7bd6742f964901133105c7154eaa2a8073bb50cff4182b732f5548ce1b6f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7f7bb21d5dea8a31313d792db4443ad446d728ba4519ca7821e768772ada14af
[INFO] running `Command { std: "docker" "start" "-a" "7f7bb21d5dea8a31313d792db4443ad446d728ba4519ca7821e768772ada14af", kill_on_drop: false }`
[INFO] [stderr]    Compiling thunderdome v0.4.2
[INFO] [stderr]    Compiling 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] note: `IterLinksMut` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/iter_links.rs:56:10
[INFO] [stdout]    |
[INFO] [stdout] 56 | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[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] note: `IterLinksMut` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/iter_links.rs:56:10
[INFO] [stdout]    |
[INFO] [stdout] 56 | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[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] note: `IterLinksMut` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/iter_links.rs:56:10
[INFO] [stdout]    |
[INFO] [stdout] 56 | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.24s
[INFO] running `Command { std: "docker" "inspect" "7f7bb21d5dea8a31313d792db4443ad446d728ba4519ca7821e768772ada14af", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7f7bb21d5dea8a31313d792db4443ad446d728ba4519ca7821e768772ada14af", kill_on_drop: false }`
[INFO] [stdout] 7f7bb21d5dea8a31313d792db4443ad446d728ba4519ca7821e768772ada14af
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e09e14b30ad820fe783abeec89bfa2c96efbb1fb3522b4614d9936ff64a6a37b
[INFO] running `Command { std: "docker" "start" "-a" "e09e14b30ad820fe783abeec89bfa2c96efbb1fb3522b4614d9936ff64a6a37b", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling 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] note: `IterLinksMut` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/iter_links.rs:56:10
[INFO] [stdout]    |
[INFO] [stdout] 56 | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[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] note: `IterLinksMut` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/iter_links.rs:56:10
[INFO] [stdout]    |
[INFO] [stdout] 56 | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[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] note: `IterLinksMut` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/iter_links.rs:56:10
[INFO] [stdout]    |
[INFO] [stdout] 56 | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[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] note: `IterLinksMut` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/iter_links.rs:56:10
[INFO] [stdout]    |
[INFO] [stdout] 56 | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[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] note: `IterLinksMut` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/iter_links.rs:56:10
[INFO] [stdout]    |
[INFO] [stdout] 56 | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[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] note: `IterLinksMut` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/iter_links.rs:56:10
[INFO] [stdout]    |
[INFO] [stdout] 56 | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.68s
[INFO] running `Command { std: "docker" "inspect" "e09e14b30ad820fe783abeec89bfa2c96efbb1fb3522b4614d9936ff64a6a37b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e09e14b30ad820fe783abeec89bfa2c96efbb1fb3522b4614d9936ff64a6a37b", kill_on_drop: false }`
[INFO] [stdout] e09e14b30ad820fe783abeec89bfa2c96efbb1fb3522b4614d9936ff64a6a37b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-110/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c4e75a01bb31e8378abdd857374fc572e5d471d3784705e7b79e394b481ba288
[INFO] running `Command { std: "docker" "start" "-a" "c4e75a01bb31e8378abdd857374fc572e5d471d3784705e7b79e394b481ba288", kill_on_drop: false }`
[INFO] [stderr] warning: field is never read: `list`
[INFO] [stderr]   --> src/iter_links.rs:58:5
[INFO] [stderr]    |
[INFO] [stderr] 58 |     list: &'a mut LinkedList<T>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] note: `IterLinksMut` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/iter_links.rs:56:10
[INFO] [stderr]    |
[INFO] [stderr] 56 | #[derive(Debug)]
[INFO] [stderr]    |          ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `fwd_pos`
[INFO] [stderr]   --> src/iter_links.rs:59:5
[INFO] [stderr]    |
[INFO] [stderr] 59 |     fwd_pos: Option<Index>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `IterLinksMut` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/iter_links.rs:56:10
[INFO] [stderr]    |
[INFO] [stderr] 56 | #[derive(Debug)]
[INFO] [stderr]    |          ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `rev_pos`
[INFO] [stderr]   --> src/iter_links.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 60 |     rev_pos: Option<Index>,
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr] note: `IterLinksMut` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]   --> src/iter_links.rs:56:10
[INFO] [stderr]    |
[INFO] [stderr] 56 | #[derive(Debug)]
[INFO] [stderr]    |          ^^^^^
[INFO] [stderr]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: `chainlink` (lib) generated 3 warnings
[INFO] [stderr] warning: `chainlink` (lib test) generated 3 warnings (3 duplicates)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/chainlink-5687e2a16599d51d)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test tests::size_of_node ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests chainlink
[INFO] [stdout] 
[INFO] [stdout] running 20 tests
[INFO] [stdout] test src/lib.rs - LinkedList<T>::head (line 129) ... ok
[INFO] [stdout] test src/lib.rs - LinkedList<T>::get (line 97) ... ok
[INFO] [stdout] test src/lib.rs - LinkedList<T>::tail (line 158) ... ok
[INFO] [stdout] test src/lib.rs - LinkedList<T>::pop_tail (line 199) ... ok
[INFO] [stdout] test src/lib.rs - LinkedList<T>::push_head (line 211) ... ok
[INFO] [stdout] test src/lib.rs - LinkedList<T>::push_tail (line 246) ... ok
[INFO] [stdout] test src/lib.rs - LinkedList<T>::new (line 78) ... ok
[INFO] [stdout] test src/lib.rs - LinkedList<T>::len (line 321) ... ok
[INFO] [stdout] test src/lib.rs - LinkedList<T>::head_mut (line 144) ... ok
[INFO] [stdout] test src/lib.rs - LinkedList<T>::pop_head (line 186) ... ok
[INFO] [stdout] test src/lib.rs - LinkedList<T>::is_empty (line 340) ... ok
[INFO] [stdout] test src/lib.rs - LinkedList<T>::remove (line 282) ... ok
[INFO] [stdout] test src/lib.rs - LinkedList<T>::iter_links (line 376) ... ok
[INFO] [stdout] test src/lib.rs - LinkedList<T>::iter_fast (line 424) ... ok
[INFO] [stdout] test src/lib.rs - LinkedList<T>::get_mut (line 111) ... ok
[INFO] [stdout] test src/lib.rs - LinkedList<T>::iter_fast_mut (line 444) ... ok
[INFO] [stdout] test src/lib.rs - (line 3) ... ok
[INFO] [stdout] test src/lib.rs - LinkedList<T>::into_vec (line 398) ... ok
[INFO] [stdout] test src/lib.rs - LinkedList<T>::tail_mut (line 173) ... ok
[INFO] [stdout] test src/lib.rs - LinkedList<T>::iter_links (line 360) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 20 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.48s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "c4e75a01bb31e8378abdd857374fc572e5d471d3784705e7b79e394b481ba288", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c4e75a01bb31e8378abdd857374fc572e5d471d3784705e7b79e394b481ba288", kill_on_drop: false }`
[INFO] [stdout] c4e75a01bb31e8378abdd857374fc572e5d471d3784705e7b79e394b481ba288