[INFO] cloning repository https://github.com/danielhenrymantilla/drop-with-owned-fields.rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/danielhenrymantilla/drop-with-owned-fields.rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanielhenrymantilla%2Fdrop-with-owned-fields.rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanielhenrymantilla%2Fdrop-with-owned-fields.rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ae3f823972a7eb27670580546829ebec9b1577dc
[INFO] checking danielhenrymantilla/drop-with-owned-fields.rs/ae3f823972a7eb27670580546829ebec9b1577dc against master#8f08b3a32478b8d0507732800ecb548a76e0fd0c for pr-144157
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdanielhenrymantilla%2Fdrop-with-owned-fields.rs" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-4-tc1/source/.cargo/config.toml
[INFO] removed /workspace/builds/worker-4-tc1/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/danielhenrymantilla/drop-with-owned-fields.rs
[INFO] finished tweaking git repo https://github.com/danielhenrymantilla/drop-with-owned-fields.rs
[INFO] tweaked toml for git repo https://github.com/danielhenrymantilla/drop-with-owned-fields.rs written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/danielhenrymantilla/drop-with-owned-fields.rs on toolchain 8f08b3a32478b8d0507732800ecb548a76e0fd0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8f08b3a32478b8d0507732800ecb548a76e0fd0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/danielhenrymantilla/drop-with-owned-fields.rs 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" "+8f08b3a32478b8d0507732800ecb548a76e0fd0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+8f08b3a32478b8d0507732800ecb548a76e0fd0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 791710968b1653fffb764f69c90bac709058debe554b4535cd38cf872f2f3d13
[INFO] running `Command { std: "docker" "start" "-a" "791710968b1653fffb764f69c90bac709058debe554b4535cd38cf872f2f3d13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "791710968b1653fffb764f69c90bac709058debe554b4535cd38cf872f2f3d13", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "791710968b1653fffb764f69c90bac709058debe554b4535cd38cf872f2f3d13", kill_on_drop: false }`
[INFO] [stdout] 791710968b1653fffb764f69c90bac709058debe554b4535cd38cf872f2f3d13
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:cf8efcab8866f2cf4285301c7418e2f4f2a9b088c91ba69c40d5b659f81557f7" "/opt/rustwide/cargo-home/bin/cargo" "+8f08b3a32478b8d0507732800ecb548a76e0fd0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 414a980baf71835eb5372890d7c70fdeb14c26f32380dfb4921a341890a360d4
[INFO] running `Command { std: "docker" "start" "-a" "414a980baf71835eb5372890d7c70fdeb14c26f32380dfb4921a341890a360d4", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.94
[INFO] [stderr]    Compiling unicode-ident v1.0.18
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]     Checking quote v1.0.40
[INFO] [stderr]     Checking syn v2.0.100
[INFO] [stderr]     Checking drop-with-owned-fields-proc_macros v0.1.1 (/opt/rustwide/workdir/src/proc_macros)
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]     Checking drop-with-owned-fields v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0428]: the name `_` is defined multiple times
[INFO] [stdout]   --> tests/main.rs:26:38
[INFO] [stdout]    |
[INFO] [stdout] 26 |         ::serde_derive::Deserialize, Serialize,
[INFO] [stdout]    |         ---------------------------  ^^^^^^^^^ `_` redefined here
[INFO] [stdout]    |         |
[INFO] [stdout]    |         previous definition of the value `_` here
[INFO] [stdout]    |
[INFO] [stdout]    = note: `_` must be defined only once in the value namespace of this module
[INFO] [stdout]    = note: this error originates in the derive macro `Serialize` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0428`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `drop-with-owned-fields` (test "main") due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "414a980baf71835eb5372890d7c70fdeb14c26f32380dfb4921a341890a360d4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "414a980baf71835eb5372890d7c70fdeb14c26f32380dfb4921a341890a360d4", kill_on_drop: false }`
[INFO] [stdout] 414a980baf71835eb5372890d7c70fdeb14c26f32380dfb4921a341890a360d4