[INFO] fetching crate ssz_rs 0.9.0...
[INFO] checking ssz_rs-0.9.0 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate ssz_rs 0.9.0 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate ssz_rs 0.9.0 on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ssz_rs 0.9.0
[INFO] finished tweaking crates.io crate ssz_rs 0.9.0
[INFO] tweaked toml for crates.io crate ssz_rs 0.9.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate crates.io crate ssz_rs 0.9.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2f85cd1e47a01216aba0845fe86041bfa75e38d22eb2a7049b6f7744c9d10380
[INFO] running `Command { std: "docker" "start" "-a" "2f85cd1e47a01216aba0845fe86041bfa75e38d22eb2a7049b6f7744c9d10380", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2f85cd1e47a01216aba0845fe86041bfa75e38d22eb2a7049b6f7744c9d10380", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f85cd1e47a01216aba0845fe86041bfa75e38d22eb2a7049b6f7744c9d10380", kill_on_drop: false }`
[INFO] [stdout] 2f85cd1e47a01216aba0845fe86041bfa75e38d22eb2a7049b6f7744c9d10380
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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 -Dtail_expr_drop_order" "-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cc783fa53fc1d8da9a2f87d334267ef024f2cab2e37876ae89c8fa7417685cdc
[INFO] running `Command { std: "docker" "start" "-a" "cc783fa53fc1d8da9a2f87d334267ef024f2cab2e37876ae89c8fa7417685cdc", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.63
[INFO] [stderr]    Compiling serde v1.0.167
[INFO] [stderr]    Compiling cpufeatures v0.2.9
[INFO] [stderr]    Compiling opaque-debug v0.3.0
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling typenum v1.16.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]    Compiling serde_json v1.0.100
[INFO] [stderr]    Compiling snap v1.1.0
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]    Compiling hex-literal v0.3.4
[INFO] [stderr]     Checking project-root v0.2.2
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]    Compiling quote v1.0.29
[INFO] [stderr]     Checking sha2 v0.9.9
[INFO] [stderr]    Compiling syn v2.0.23
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling ssz_rs v0.9.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling ssz_rs_derive v0.9.0
[INFO] [stderr]    Compiling serde_derive v1.0.167
[INFO] [stdout] warning: unused imports: `IterMut` and `iter::Enumerate`
[INFO] [stdout]   --> src/lib.rs:71:21
[INFO] [stdout]    |
[INFO] [stdout] 71 |             slice::{IterMut, SliceIndex},
[INFO] [stdout]    |                     ^^^^^^^
[INFO] [stdout] 72 |         },
[INFO] [stdout] 73 |         iter::Enumerate,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `IterMut` and `iter::Enumerate`
[INFO] [stdout]   --> src/lib.rs:71:21
[INFO] [stdout]    |
[INFO] [stdout] 71 |             slice::{IterMut, SliceIndex},
[INFO] [stdout]    |                     ^^^^^^^
[INFO] [stdout] 72 |         },
[INFO] [stdout] 73 |         iter::Enumerate,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 25.47s
[INFO] running `Command { std: "docker" "inspect" "cc783fa53fc1d8da9a2f87d334267ef024f2cab2e37876ae89c8fa7417685cdc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc783fa53fc1d8da9a2f87d334267ef024f2cab2e37876ae89c8fa7417685cdc", kill_on_drop: false }`
[INFO] [stdout] cc783fa53fc1d8da9a2f87d334267ef024f2cab2e37876ae89c8fa7417685cdc