[INFO] fetching crate serde_yang 0.2.0...
[INFO] checking serde_yang-0.2.0 against try#998b6603a58e47f42ccce7a67943234e96b6839e for pr-143170
[INFO] extracting crate serde_yang 0.2.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate serde_yang 0.2.0
[INFO] finished tweaking crates.io crate serde_yang 0.2.0
[INFO] tweaked toml for crates.io crate serde_yang 0.2.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate serde_yang 0.2.0 on toolchain 998b6603a58e47f42ccce7a67943234e96b6839e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 6 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+998b6603a58e47f42ccce7a67943234e96b6839e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2151ff49c12f4b334d02d1df9de9242b2a17efe006d8391f5dfac51a2ba03536
[INFO] running `Command { std: "docker" "start" "-a" "2151ff49c12f4b334d02d1df9de9242b2a17efe006d8391f5dfac51a2ba03536", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2151ff49c12f4b334d02d1df9de9242b2a17efe006d8391f5dfac51a2ba03536", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2151ff49c12f4b334d02d1df9de9242b2a17efe006d8391f5dfac51a2ba03536", kill_on_drop: false }`
[INFO] [stdout] 2151ff49c12f4b334d02d1df9de9242b2a17efe006d8391f5dfac51a2ba03536
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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" "+998b6603a58e47f42ccce7a67943234e96b6839e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8187e4a2deb3ccab54916439eb0885d5caabb1477c4943ce59412ccdd024a3e6
[INFO] running `Command { std: "docker" "start" "-a" "8187e4a2deb3ccab54916439eb0885d5caabb1477c4943ce59412ccdd024a3e6", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]     Checking serde v1.0.219
[INFO] [stderr]     Checking serde_yang v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `built_in`
[INFO] [stdout]   --> src/ser/serializer.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |         built_in
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `built_in`
[INFO] [stdout]   --> src/ser/serializer.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |         built_in
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `type_mapping` is never used
[INFO] [stdout]   --> src/ser/types.rs:75:12
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub fn type_mapping<'a>() -> HashMap<Type, &'a str>
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `type_mapping` is never used
[INFO] [stdout]   --> src/ser/types.rs:75:12
[INFO] [stdout]    |
[INFO] [stdout] 75 |     pub fn type_mapping<'a>() -> HashMap<Type, &'a str>
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.82s
[INFO] running `Command { std: "docker" "inspect" "8187e4a2deb3ccab54916439eb0885d5caabb1477c4943ce59412ccdd024a3e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8187e4a2deb3ccab54916439eb0885d5caabb1477c4943ce59412ccdd024a3e6", kill_on_drop: false }`
[INFO] [stdout] 8187e4a2deb3ccab54916439eb0885d5caabb1477c4943ce59412ccdd024a3e6