[INFO] fetching crate lurk-ipld-core 0.3.0...
[INFO] checking lurk-ipld-core-0.3.0 against master#c2f2db79ca3024f68d22b45aa22b570775c2c4ad for pr-124157
[INFO] extracting crate lurk-ipld-core 0.3.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate lurk-ipld-core 0.3.0 on toolchain c2f2db79ca3024f68d22b45aa22b570775c2c4ad
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lurk-ipld-core 0.3.0
[INFO] finished tweaking crates.io crate lurk-ipld-core 0.3.0
[INFO] tweaked toml for crates.io crate lurk-ipld-core 0.3.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 41 packages to latest compatible versions
[INFO] [stderr]       Adding cid v0.8.6 (latest: v0.11.1)
[INFO] [stderr]       Adding multihash v0.16.3 (latest: v0.19.1)
[INFO] [stderr]       Adding multihash-derive v0.8.1 (latest: v0.9.0)
[INFO] [stderr]       Adding proc-macro-crate v1.1.3 (latest: v3.1.0)
[INFO] [stderr]       Adding serde-big-array v0.3.3 (latest: v0.5.1)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.60)
[INFO] [stderr]       Adding synstructure v0.12.6 (latest: v0.13.1)
[INFO] [stderr]       Adding toml v0.5.11 (latest: v0.8.12)
[INFO] [stderr]       Adding unsigned-varint v0.7.2 (latest: v0.8.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 08007035dcf4d104798257ba9216c25eab61079e4114671287b0cda1ac091eca
[INFO] running `Command { std: "docker" "start" "-a" "08007035dcf4d104798257ba9216c25eab61079e4114671287b0cda1ac091eca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "08007035dcf4d104798257ba9216c25eab61079e4114671287b0cda1ac091eca", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08007035dcf4d104798257ba9216c25eab61079e4114671287b0cda1ac091eca", kill_on_drop: false }`
[INFO] [stdout] 08007035dcf4d104798257ba9216c25eab61079e4114671287b0cda1ac091eca
[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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fbe7408c130d034cc1046555daf323c3d9900356736b965133a0b901eed853c9
[INFO] running `Command { std: "docker" "start" "-a" "fbe7408c130d034cc1046555daf323c3d9900356736b965133a0b901eed853c9", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.200
[INFO] [stderr]     Checking multihash v0.16.3
[INFO] [stderr]     Checking cid v0.8.6
[INFO] [stderr]     Checking serde_test v1.0.176
[INFO] [stderr]     Checking serde_bytes v0.11.14
[INFO] [stderr]     Checking serde_json v1.0.116
[INFO] [stderr]     Checking lurk-ipld-core v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: using `.deref()` on a double reference, which returns `&T` instead of dereferencing the inner type
[INFO] [stdout]   --> src/codec.rs:50:13
[INFO] [stdout]    |
[INFO] [stdout] 50 |         self.deref().encode(c, w)
[INFO] [stdout]    |             ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]   --> src/lib.rs:3:9
[INFO] [stdout]    |
[INFO] [stdout] 3  | #![deny(warnings)]
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    = note: `#[deny(suspicious_double_ref_op)]` implied by `#[deny(warnings)]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `lurk-ipld-core` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "fbe7408c130d034cc1046555daf323c3d9900356736b965133a0b901eed853c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fbe7408c130d034cc1046555daf323c3d9900356736b965133a0b901eed853c9", kill_on_drop: false }`
[INFO] [stdout] fbe7408c130d034cc1046555daf323c3d9900356736b965133a0b901eed853c9
