[INFO] fetching crate rs-car 0.4.1...
[INFO] checking rs-car-0.4.1 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate rs-car 0.4.1 into /workspace/builds/worker-4-tc2/source
[INFO] validating manifest of crates.io crate rs-car 0.4.1 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 rs-car 0.4.1
[INFO] finished tweaking crates.io crate rs-car 0.4.1
[INFO] tweaked toml for crates.io crate rs-car 0.4.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 128 packages to latest compatible versions
[INFO] [stderr]       Adding async-channel v1.9.0 (available: v2.3.1)
[INFO] [stderr]       Adding cid v0.10.1 (available: v0.11.1)
[INFO] [stderr]       Adding env_logger v0.8.4 (available: v0.11.5)
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[INFO] [stderr]       Adding generic-array v0.14.7 (available: v1.1.0)
[INFO] [stderr]       Adding linux-raw-sys v0.4.14 (available: v0.6.5)
[INFO] [stderr]       Adding multihash v0.18.1 (available: v0.19.1)
[INFO] [stderr]       Adding multihash-derive v0.8.1 (available: v0.9.0)
[INFO] [stderr]       Adding proc-macro-crate v1.1.3 (available: v1.3.1)
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.77)
[INFO] [stderr]       Adding synstructure v0.12.6 (available: v0.13.1)
[INFO] [stderr]       Adding toml v0.5.11 (available: v0.8.19)
[INFO] [stderr]       Adding unsigned-varint v0.7.2 (available: v0.8.0)
[INFO] [stderr]       Adding wasi v0.11.0+wasi-snapshot-preview1 (available: v0.13.2+wasi-0.2.1)
[INFO] [stderr]       Adding windows-sys v0.52.0 (available: v0.59.0)
[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-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] 97a65bf64692463e534f202a159a4c36d571e48a81de058c9c9194c389c3a15c
[INFO] running `Command { std: "docker" "start" "-a" "97a65bf64692463e534f202a159a4c36d571e48a81de058c9c9194c389c3a15c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "97a65bf64692463e534f202a159a4c36d571e48a81de058c9c9194c389c3a15c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "97a65bf64692463e534f202a159a4c36d571e48a81de058c9c9194c389c3a15c", kill_on_drop: false }`
[INFO] [stdout] 97a65bf64692463e534f202a159a4c36d571e48a81de058c9c9194c389c3a15c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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] c883dc89167636087ab341264593f6f28cab107267dd6ae587aa28ca565a4b84
[INFO] running `Command { std: "docker" "start" "-a" "c883dc89167636087ab341264593f6f28cab107267dd6ae587aa28ca565a4b84", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.86
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[INFO] [stderr]     Checking futures-io v0.3.30
[INFO] [stderr]    Compiling thiserror v1.0.64
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[INFO] [stderr]    Compiling proc-macro-crate v1.1.3
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[INFO] [stderr]     Checking rs-car v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> tests/errors.rs:6:13
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Success(&'static str),
[INFO] [stdout]   |     ------- ^^^^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Success(()),
[INFO] [stdout]   |             ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 51.35s
[INFO] running `Command { std: "docker" "inspect" "c883dc89167636087ab341264593f6f28cab107267dd6ae587aa28ca565a4b84", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c883dc89167636087ab341264593f6f28cab107267dd6ae587aa28ca565a4b84", kill_on_drop: false }`
[INFO] [stdout] c883dc89167636087ab341264593f6f28cab107267dd6ae587aa28ca565a4b84