[INFO] fetching crate serde-ext 0.1.1...
[INFO] checking serde-ext-0.1.1 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate serde-ext 0.1.1 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate serde-ext 0.1.1 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate serde-ext 0.1.1
[INFO] finished tweaking crates.io crate serde-ext 0.1.1
[INFO] tweaked toml for crates.io crate serde-ext 0.1.1 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2eff51c1d07b5a1cd42fac088772a2693c796f5b24fb15df15c8acf8613048a5
[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" "2eff51c1d07b5a1cd42fac088772a2693c796f5b24fb15df15c8acf8613048a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2eff51c1d07b5a1cd42fac088772a2693c796f5b24fb15df15c8acf8613048a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2eff51c1d07b5a1cd42fac088772a2693c796f5b24fb15df15c8acf8613048a5", kill_on_drop: false }`
[INFO] [stdout] 2eff51c1d07b5a1cd42fac088772a2693c796f5b24fb15df15c8acf8613048a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] de4c91b6a5148b8d98005ad4f1ea2b6b2dc3b8b5850c6b2ea2180a3bcf9cb81e
[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" "de4c91b6a5148b8d98005ad4f1ea2b6b2dc3b8b5850c6b2ea2180a3bcf9cb81e", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]     Checking base64 v0.10.1
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking serde v1.0.130
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]     Checking serde_json v1.0.72
[INFO] [stderr]    Compiling derive_more v0.15.0
[INFO] [stderr]    Compiling serde-ext-macros v0.1.1
[INFO] [stderr]     Checking serde-ext v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `a`
[INFO] [stdout]  --> examples/simple.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     a: i32,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `b`
[INFO] [stdout]  --> examples/simple.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     b: String,
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `url`
[INFO] [stdout]  --> examples/simple.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     url: url::Url,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `base64_bytes`
[INFO] [stdout]   --> examples/simple.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 11 |     base64_bytes: Vec<u8>,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `non_empty_string`
[INFO] [stdout]   --> examples/simple.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 |     non_empty_string: Option<String>
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 34.63s
[INFO] running `Command { std: "docker" "inspect" "de4c91b6a5148b8d98005ad4f1ea2b6b2dc3b8b5850c6b2ea2180a3bcf9cb81e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de4c91b6a5148b8d98005ad4f1ea2b6b2dc3b8b5850c6b2ea2180a3bcf9cb81e", kill_on_drop: false }`
[INFO] [stdout] de4c91b6a5148b8d98005ad4f1ea2b6b2dc3b8b5850c6b2ea2180a3bcf9cb81e