[INFO] fetching crate serde_jacl 0.3.6...
[INFO] checking serde_jacl-0.3.6 against master#a5f164faad4a2fed606b8160fd7ecd2d5cbba381 for pr-84920
[INFO] extracting crate serde_jacl 0.3.6 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate serde_jacl 0.3.6 on toolchain a5f164faad4a2fed606b8160fd7ecd2d5cbba381
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde_jacl 0.3.6
[INFO] finished tweaking crates.io crate serde_jacl 0.3.6
[INFO] tweaked toml for crates.io crate serde_jacl 0.3.6 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bea9f2d015187c9c5e88be53e37950437a66ef7b978642126a41f56e1bcd1676
[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" "bea9f2d015187c9c5e88be53e37950437a66ef7b978642126a41f56e1bcd1676", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bea9f2d015187c9c5e88be53e37950437a66ef7b978642126a41f56e1bcd1676", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bea9f2d015187c9c5e88be53e37950437a66ef7b978642126a41f56e1bcd1676", kill_on_drop: false }`
[INFO] [stdout] bea9f2d015187c9c5e88be53e37950437a66ef7b978642126a41f56e1bcd1676
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+a5f164faad4a2fed606b8160fd7ecd2d5cbba381" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6f396c0338613dd55b2250f32034ce95076dac2b5692a3aa6acb18947e8cd381
[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" "6f396c0338613dd55b2250f32034ce95076dac2b5692a3aa6acb18947e8cd381", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]     Checking static_assertions v1.1.0
[INFO] [stderr]     Checking escape8259 v0.5.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling num-bigint v0.3.2
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]     Checking serde v1.0.125
[INFO] [stderr]     Checking lexical-core v0.7.6
[INFO] [stderr]    Compiling nom v5.1.2
[INFO] [stderr]     Checking num-complex v0.3.1
[INFO] [stderr]     Checking num v0.3.1
[INFO] [stderr]     Checking serde_jacl v0.3.6 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/ser.rs:23:18
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn custom<T>(f: T) -> Self
[INFO] [stdout]    |                  ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> src/ser.rs:23:18
[INFO] [stdout]    |
[INFO] [stdout] 23 |     fn custom<T>(f: T) -> Self
[INFO] [stdout]    |                  ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.53s
[INFO] running `Command { std: "docker" "inspect" "6f396c0338613dd55b2250f32034ce95076dac2b5692a3aa6acb18947e8cd381", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6f396c0338613dd55b2250f32034ce95076dac2b5692a3aa6acb18947e8cd381", kill_on_drop: false }`
[INFO] [stdout] 6f396c0338613dd55b2250f32034ce95076dac2b5692a3aa6acb18947e8cd381