[INFO] fetching crate trans-derive 0.4.0-alpha.1...
[INFO] checking trans-derive-0.4.0-alpha.1 against beta for pr-78714
[INFO] extracting crate trans-derive 0.4.0-alpha.1 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate trans-derive 0.4.0-alpha.1 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate trans-derive 0.4.0-alpha.1
[INFO] finished tweaking crates.io crate trans-derive 0.4.0-alpha.1
[INFO] tweaked toml for crates.io crate trans-derive 0.4.0-alpha.1 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3617f1ee97f9479a27381f36d7093d5ea479459bbaa943769854cf0e28593dd4
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3617f1ee97f9479a27381f36d7093d5ea479459bbaa943769854cf0e28593dd4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3617f1ee97f9479a27381f36d7093d5ea479459bbaa943769854cf0e28593dd4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3617f1ee97f9479a27381f36d7093d5ea479459bbaa943769854cf0e28593dd4", kill_on_drop: false }`
[INFO] [stdout] 3617f1ee97f9479a27381f36d7093d5ea479459bbaa943769854cf0e28593dd4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2e71bc508a226f810846ed693e929f6b2f7ed02df2c2c8755db1ffecd7ef0f9a
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2e71bc508a226f810846ed693e929f6b2f7ed02df2c2c8755db1ffecd7ef0f9a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking trans-derive v0.4.0-alpha.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `field_schema_names`
[INFO] [stdout]    --> src/lib.rs:371:29
[INFO] [stdout]     |
[INFO] [stdout] 371 |                         let field_schema_names = field_schema_names(variant.fields.iter());
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_field_schema_names`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `field_tys`
[INFO] [stdout]    --> src/lib.rs:372:29
[INFO] [stdout]     |
[INFO] [stdout] 372 |                         let field_tys = variant.fields.iter().map(|field| &field.ty);
[INFO] [stdout]     |                             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_field_tys`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `field_schema_names`
[INFO] [stdout]    --> src/lib.rs:168:25
[INFO] [stdout]     |
[INFO] [stdout] 168 |                     let field_schema_names: Vec<_> = field_schema_names(fields.iter()).collect();
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_field_schema_names`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lib.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let mut current_language = "en".to_owned();
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `field_schema_names`
[INFO] [stdout]    --> src/lib.rs:371:29
[INFO] [stdout]     |
[INFO] [stdout] 371 |                         let field_schema_names = field_schema_names(variant.fields.iter());
[INFO] [stdout]     |                             ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_field_schema_names`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `field_tys`
[INFO] [stdout]    --> src/lib.rs:372:29
[INFO] [stdout]     |
[INFO] [stdout] 372 |                         let field_tys = variant.fields.iter().map(|field| &field.ty);
[INFO] [stdout]     |                             ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_field_tys`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `field_schema_names`
[INFO] [stdout]    --> src/lib.rs:168:25
[INFO] [stdout]     |
[INFO] [stdout] 168 |                     let field_schema_names: Vec<_> = field_schema_names(fields.iter()).collect();
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_field_schema_names`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/lib.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let mut current_language = "en".to_owned();
[INFO] [stdout]    |         ----^^^^^^^^^^^^^^^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:264:21
[INFO] [stdout]     |
[INFO] [stdout] 264 |                 let mut generics = ast.generics.clone();
[INFO] [stdout]     |                     ----^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/lib.rs:264:21
[INFO] [stdout]     |
[INFO] [stdout] 264 |                 let mut generics = ast.generics.clone();
[INFO] [stdout]     |                     ----^^^^^^^^
[INFO] [stdout]     |                     |
[INFO] [stdout]     |                     help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.46s
[INFO] running `Command { std: "docker" "inspect" "2e71bc508a226f810846ed693e929f6b2f7ed02df2c2c8755db1ffecd7ef0f9a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2e71bc508a226f810846ed693e929f6b2f7ed02df2c2c8755db1ffecd7ef0f9a", kill_on_drop: false }`
[INFO] [stdout] 2e71bc508a226f810846ed693e929f6b2f7ed02df2c2c8755db1ffecd7ef0f9a