[INFO] fetching crate serde_yang 0.2.0...
[INFO] building serde_yang-0.2.0 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate serde_yang 0.2.0 into /workspace/builds/worker-7-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-7-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate serde_yang 0.2.0 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "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" "+4987e9d4227139400384ab59296ffee3b0fb1183" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 7 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 00eb1b72772538fb75a9b8a09a9d817c35c422092f8463c6dfe5f8f95657c03c
[INFO] running `Command { std: "docker" "start" "-a" "00eb1b72772538fb75a9b8a09a9d817c35c422092f8463c6dfe5f8f95657c03c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "00eb1b72772538fb75a9b8a09a9d817c35c422092f8463c6dfe5f8f95657c03c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00eb1b72772538fb75a9b8a09a9d817c35c422092f8463c6dfe5f8f95657c03c", kill_on_drop: false }`
[INFO] [stdout] 00eb1b72772538fb75a9b8a09a9d817c35c422092f8463c6dfe5f8f95657c03c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b5dd50bc3e23442ff9a9592afc596520173516f5bc375068005483cdcaf45121
[INFO] running `Command { std: "docker" "start" "-a" "b5dd50bc3e23442ff9a9592afc596520173516f5bc375068005483cdcaf45121", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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)]` (part of `#[warn(unused)]`) 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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.54s
[INFO] running `Command { std: "docker" "inspect" "b5dd50bc3e23442ff9a9592afc596520173516f5bc375068005483cdcaf45121", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5dd50bc3e23442ff9a9592afc596520173516f5bc375068005483cdcaf45121", kill_on_drop: false }`
[INFO] [stdout] b5dd50bc3e23442ff9a9592afc596520173516f5bc375068005483cdcaf45121
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ca06c6cb0ad35a169f195c72d030455564658be6bc9b0ff9f595ed7ccba10554
[INFO] running `Command { std: "docker" "start" "-a" "ca06c6cb0ad35a169f195c72d030455564658be6bc9b0ff9f595ed7ccba10554", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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)]` (part of `#[warn(unused)]`) 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)]` (part of `#[warn(unused)]`) 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)]` (part of `#[warn(unused)]`) 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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.80s
[INFO] running `Command { std: "docker" "inspect" "ca06c6cb0ad35a169f195c72d030455564658be6bc9b0ff9f595ed7ccba10554", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca06c6cb0ad35a169f195c72d030455564658be6bc9b0ff9f595ed7ccba10554", kill_on_drop: false }`
[INFO] [stdout] ca06c6cb0ad35a169f195c72d030455564658be6bc9b0ff9f595ed7ccba10554