[INFO] fetching crate unit17 0.1.0...
[INFO] building unit17-0.1.0 against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] extracting crate unit17 0.1.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate unit17 0.1.0
[INFO] finished tweaking crates.io crate unit17 0.1.0
[INFO] tweaked toml for crates.io crate unit17 0.1.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate unit17 0.1.0 on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate unit17 0.1.0 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" "+4987e9d4227139400384ab59296ffee3b0fb1183" "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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 54d04eb9d8254c12d34a01ca584b0855ca23d212f910c8e4e087c58600ca5356
[INFO] running `Command { std: "docker" "start" "-a" "54d04eb9d8254c12d34a01ca584b0855ca23d212f910c8e4e087c58600ca5356", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "54d04eb9d8254c12d34a01ca584b0855ca23d212f910c8e4e087c58600ca5356", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "54d04eb9d8254c12d34a01ca584b0855ca23d212f910c8e4e087c58600ca5356", kill_on_drop: false }`
[INFO] [stdout] 54d04eb9d8254c12d34a01ca584b0855ca23d212f910c8e4e087c58600ca5356
[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" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ef408ad6942c45e3caae08bc30b12a61acb6d5449f8a76ef5ff1fbd04eab0843
[INFO] running `Command { std: "docker" "start" "-a" "ef408ad6942c45e3caae08bc30b12a61acb6d5449f8a76ef5ff1fbd04eab0843", kill_on_drop: false }`
[INFO] [stderr]    Compiling unit17 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `dyn_struct_vec` is never read
[INFO] [stdout]   --> src/main.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 37 | struct DynStruct {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 40 |     dyn_struct_vec: Vec<Box<dyn DynTrait>>,// 为了将trait用作trait对象，此处必需要将它放在某种指针之后，比如：&dyn trait、Box<dyn trait>、Rc<dyn trait>...
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.43s
[INFO] running `Command { std: "docker" "inspect" "ef408ad6942c45e3caae08bc30b12a61acb6d5449f8a76ef5ff1fbd04eab0843", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef408ad6942c45e3caae08bc30b12a61acb6d5449f8a76ef5ff1fbd04eab0843", kill_on_drop: false }`
[INFO] [stdout] ef408ad6942c45e3caae08bc30b12a61acb6d5449f8a76ef5ff1fbd04eab0843
[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" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 503f85ead847c82f2a7cd2b61c450357646aa989d0e2e02dd88edc32e5cd8c4e
[INFO] running `Command { std: "docker" "start" "-a" "503f85ead847c82f2a7cd2b61c450357646aa989d0e2e02dd88edc32e5cd8c4e", kill_on_drop: false }`
[INFO] [stderr]    Compiling unit17 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `dyn_struct_vec` is never read
[INFO] [stdout]   --> src/main.rs:40:5
[INFO] [stdout]    |
[INFO] [stdout] 37 | struct DynStruct {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 40 |     dyn_struct_vec: Vec<Box<dyn DynTrait>>,// 为了将trait用作trait对象，此处必需要将它放在某种指针之后，比如：&dyn trait、Box<dyn trait>、Rc<dyn trait>...
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `Command { std: "docker" "inspect" "503f85ead847c82f2a7cd2b61c450357646aa989d0e2e02dd88edc32e5cd8c4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "503f85ead847c82f2a7cd2b61c450357646aa989d0e2e02dd88edc32e5cd8c4e", kill_on_drop: false }`
[INFO] [stdout] 503f85ead847c82f2a7cd2b61c450357646aa989d0e2e02dd88edc32e5cd8c4e