[INFO] cloning repository https://github.com/paritytech/parity-codec
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/paritytech/parity-codec" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fparitytech%2Fparity-codec", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fparitytech%2Fparity-codec'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a1c9b026a6d6a5ed7f1eebbf7aeb97177420abc6
[INFO] checking paritytech/parity-codec against master#158f00a1c5175648af6f6099b075f78d1d014a28 for pr-121251
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fparitytech%2Fparity-codec" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/paritytech/parity-codec on toolchain 158f00a1c5175648af6f6099b075f78d1d014a28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+158f00a1c5175648af6f6099b075f78d1d014a28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/paritytech/parity-codec
[INFO] finished tweaking git repo https://github.com/paritytech/parity-codec
[INFO] tweaked toml for git repo https://github.com/paritytech/parity-codec written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/paritytech/parity-codec 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" "+158f00a1c5175648af6f6099b075f78d1d014a28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded honggfuzz v0.5.55
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+158f00a1c5175648af6f6099b075f78d1d014a28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3fb53679b9ed75e40f46479e8212ed5acbd6421b601c48bf58cd25f185ad8a70
[INFO] running `Command { std: "docker" "start" "-a" "3fb53679b9ed75e40f46479e8212ed5acbd6421b601c48bf58cd25f185ad8a70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3fb53679b9ed75e40f46479e8212ed5acbd6421b601c48bf58cd25f185ad8a70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3fb53679b9ed75e40f46479e8212ed5acbd6421b601c48bf58cd25f185ad8a70", kill_on_drop: false }`
[INFO] [stdout] 3fb53679b9ed75e40f46479e8212ed5acbd6421b601c48bf58cd25f185ad8a70
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+158f00a1c5175648af6f6099b075f78d1d014a28" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 992eec1e8459ef77f98877560070326835116010f2c44d5bf7f0b6f648be733a
[INFO] running `Command { std: "docker" "start" "-a" "992eec1e8459ef77f98877560070326835116010f2c44d5bf7f0b6f648be733a", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.78
[INFO] [stderr]    Compiling libc v0.2.149
[INFO] [stderr]    Compiling serde v1.0.197
[INFO] [stderr]    Compiling syn v1.0.98
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[INFO] [stderr]    Compiling num-traits v0.2.15
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[INFO] [stderr]     Checking byte-slice-cast v1.2.2
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[INFO] [stderr]     Checking parity-scale-codec-derive v3.6.8 (/opt/rustwide/workdir/derive)
[INFO] [stderr]    Compiling impl-trait-for-tuples v0.2.2
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> derive/src/encode.rs:106:7
[INFO] [stdout]     |
[INFO] [stdout] 106 |     Skip(&'a Field),
[INFO] [stdout]     |     ---- ^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 106 |     Skip(()),
[INFO] [stdout]     |          ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> derive/src/encode.rs:106:7
[INFO] [stdout]     |
[INFO] [stdout] 106 |     Skip(&'a Field),
[INFO] [stdout]     |     ---- ^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 106 |     Skip(()),
[INFO] [stdout]     |          ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking parity-scale-codec v3.6.8 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking ciborium v0.2.0
[INFO] [stderr]     Checking basic-toml v0.1.8
[INFO] [stderr]     Checking codec-fuzzer v0.1.0 (/opt/rustwide/workdir/fuzzer)
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.4.0
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> derive/src/encode.rs:106:7
[INFO] [stdout]     |
[INFO] [stdout] 106 |     Skip(&'a Field),
[INFO] [stdout]     |     ---- ^^^^^^^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 106 |     Skip(()),
[INFO] [stdout]     |          ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `1` is never read
[INFO] [stdout]   --> tests/type_inference.rs:34:54
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub struct B<T: Trait>((T::AccountId, T::AccountId), Vec<(T::Value, T::Value)>);
[INFO] [stdout]    |            - field in this struct                    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 34 | pub struct B<T: Trait>((T::AccountId, T::AccountId), ());
[INFO] [stdout]    |                                                      ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> tests/chain-error.rs:27:22
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct StructUnnamed(u16);
[INFO] [stdout]    |        ------------- ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = note: `StructUnnamed` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 27 | struct StructUnnamed(());
[INFO] [stdout]    |                      ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> tests/chain-error.rs:32:17
[INFO] [stdout]    |
[INFO] [stdout] 32 |     VariantUnnamed(u16),
[INFO] [stdout]    |     -------------- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 32 |     VariantUnnamed(()),
[INFO] [stdout]    |                    ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> tests/mod.rs:672:29
[INFO] [stdout]     |
[INFO] [stdout] 672 |     struct HugeArrayNewtypeBox(Box<HugeArrayNewtype>);
[INFO] [stdout]     |            ------------------- ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 672 |     struct HugeArrayNewtypeBox(());
[INFO] [stdout]     |                                ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> tests/mod.rs:715:27
[INFO] [stdout]     |
[INFO] [stdout] 715 |     struct NewtypeWithZstBox(Box<NewtypeWithZst>);
[INFO] [stdout]     |            ----------------- ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 715 |     struct NewtypeWithZstBox(());
[INFO] [stdout]     |                              ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> tests/mod.rs:766:16
[INFO] [stdout]     |
[INFO] [stdout] 766 |     struct Foobar(u8);
[INFO] [stdout]     |            ------ ^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 766 |     struct Foobar(());
[INFO] [stdout]     |                   ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]    --> tests/mod.rs:790:16
[INFO] [stdout]     |
[INFO] [stdout] 790 |     struct Foobar(u8);
[INFO] [stdout]     |            ------ ^^
[INFO] [stdout]     |            |
[INFO] [stdout]     |            field in this struct
[INFO] [stdout]     |
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]     |
[INFO] [stdout] 790 |     struct Foobar(());
[INFO] [stdout]     |                   ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.13s
[INFO] running `Command { std: "docker" "inspect" "992eec1e8459ef77f98877560070326835116010f2c44d5bf7f0b6f648be733a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "992eec1e8459ef77f98877560070326835116010f2c44d5bf7f0b6f648be733a", kill_on_drop: false }`
[INFO] [stdout] 992eec1e8459ef77f98877560070326835116010f2c44d5bf7f0b6f648be733a
