[INFO] fetching crate atomic_cell 0.2.0...
[INFO] checking atomic_cell-0.2.0 against master#bbe853615821442ef11d6cd42a30a73432b38d89 for pr-154205
[INFO] extracting crate atomic_cell 0.2.0 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate atomic_cell 0.2.0
[INFO] finished tweaking crates.io crate atomic_cell 0.2.0
[INFO] tweaked toml for crates.io crate atomic_cell 0.2.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate atomic_cell 0.2.0 on toolchain bbe853615821442ef11d6cd42a30a73432b38d89
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bbe853615821442ef11d6cd42a30a73432b38d89" "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" "+bbe853615821442ef11d6cd42a30a73432b38d89" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 2 packages to latest compatible versions
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bbe853615821442ef11d6cd42a30a73432b38d89" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+bbe853615821442ef11d6cd42a30a73432b38d89" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e45757852198a89e18c1cae98a8ec8211a00414f2c235cb441c133e83519b801
[INFO] running `Command { std: "docker" "start" "-a" "e45757852198a89e18c1cae98a8ec8211a00414f2c235cb441c133e83519b801", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e45757852198a89e18c1cae98a8ec8211a00414f2c235cb441c133e83519b801", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e45757852198a89e18c1cae98a8ec8211a00414f2c235cb441c133e83519b801", kill_on_drop: false }`
[INFO] [stdout] e45757852198a89e18c1cae98a8ec8211a00414f2c235cb441c133e83519b801
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+bbe853615821442ef11d6cd42a30a73432b38d89" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b2b764c8e400bda28beed84199eace147ad750de20bf252e09ca55a9515dfbc6
[INFO] running `Command { std: "docker" "start" "-a" "b2b764c8e400bda28beed84199eace147ad750de20bf252e09ca55a9515dfbc6", kill_on_drop: false }`
[INFO] [stderr]     Checking typewit v1.14.2
[INFO] [stderr]     Checking const_panic v0.2.15
[INFO] [stderr]     Checking atomic_cell v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> tests/atomic_cell.rs:8:22
[INFO] [stdout]   |
[INFO] [stdout] 8 |     struct UsizeWrap(usize);
[INFO] [stdout]   |            --------- ^^^^^
[INFO] [stdout]   |            |
[INFO] [stdout]   |            field in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing this field
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> tests/atomic_cell.rs:9:19
[INFO] [stdout]   |
[INFO] [stdout] 9 |     struct U8Wrap(bool);
[INFO] [stdout]   |            ------ ^^^^
[INFO] [stdout]   |            |
[INFO] [stdout]   |            field in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing this field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> tests/atomic_cell.rs:10:20
[INFO] [stdout]    |
[INFO] [stdout] 10 |     struct I16Wrap(i16);
[INFO] [stdout]    |            ------- ^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> tests/atomic_cell.rs:12:22
[INFO] [stdout]    |
[INFO] [stdout] 12 |     struct U64Align8(u64);
[INFO] [stdout]    |            --------- ^^^
[INFO] [stdout]    |            |
[INFO] [stdout]    |            field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.62s
[INFO] running `Command { std: "docker" "inspect" "b2b764c8e400bda28beed84199eace147ad750de20bf252e09ca55a9515dfbc6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b2b764c8e400bda28beed84199eace147ad750de20bf252e09ca55a9515dfbc6", kill_on_drop: false }`
[INFO] [stdout] b2b764c8e400bda28beed84199eace147ad750de20bf252e09ca55a9515dfbc6