[INFO] cloning repository https://github.com/study-core/my-rust-coding-studing
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/study-core/my-rust-coding-studing" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstudy-core%2Fmy-rust-coding-studing", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstudy-core%2Fmy-rust-coding-studing'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] efe4c16988d7f84a96c014a6691aa2c3e82141cd
[INFO] building study-core/my-rust-coding-studing against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fstudy-core%2Fmy-rust-coding-studing" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/study-core/my-rust-coding-studing on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/study-core/my-rust-coding-studing
[INFO] finished tweaking git repo https://github.com/study-core/my-rust-coding-studing
[INFO] tweaked toml for git repo https://github.com/study-core/my-rust-coding-studing written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/study-core/my-rust-coding-studing 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4041532629e62ef38a3bb25b3fcb9dfa92f909e14144ee9d4588451a6f9ad220
[INFO] running `Command { std: "docker" "start" "-a" "4041532629e62ef38a3bb25b3fcb9dfa92f909e14144ee9d4588451a6f9ad220", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4041532629e62ef38a3bb25b3fcb9dfa92f909e14144ee9d4588451a6f9ad220", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4041532629e62ef38a3bb25b3fcb9dfa92f909e14144ee9d4588451a6f9ad220", kill_on_drop: false }`
[INFO] [stdout] 4041532629e62ef38a3bb25b3fcb9dfa92f909e14144ee9d4588451a6f9ad220
[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 -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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7c0af4ddb40a757c8d56b0603a28450947b0713c3dd1da236818b08e2e8b296f
[INFO] running `Command { std: "docker" "start" "-a" "7c0af4ddb40a757c8d56b0603a28450947b0713c3dd1da236818b08e2e8b296f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.51
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling first_game v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]  --> src/lib.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Counter {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/lib.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl Counter {
[INFO] [stdout]   | ------------ associated function in this implementation
[INFO] [stdout] 8 |     fn new() -> Counter {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.79s
[INFO] running `Command { std: "docker" "inspect" "7c0af4ddb40a757c8d56b0603a28450947b0713c3dd1da236818b08e2e8b296f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c0af4ddb40a757c8d56b0603a28450947b0713c3dd1da236818b08e2e8b296f", kill_on_drop: false }`
[INFO] [stdout] 7c0af4ddb40a757c8d56b0603a28450947b0713c3dd1da236818b08e2e8b296f
[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 -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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9c826a293bd68f96a7e6d92d247accf4b5726a6962f2503c6bbdd6d801d20b5a
[INFO] running `Command { std: "docker" "start" "-a" "9c826a293bd68f96a7e6d92d247accf4b5726a6962f2503c6bbdd6d801d20b5a", kill_on_drop: false }`
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]  --> src/lib.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Counter {
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> src/lib.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl Counter {
[INFO] [stdout]   | ------------ associated function in this implementation
[INFO] [stdout] 8 |     fn new() -> Counter {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling first_game v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `Command { std: "docker" "inspect" "9c826a293bd68f96a7e6d92d247accf4b5726a6962f2503c6bbdd6d801d20b5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9c826a293bd68f96a7e6d92d247accf4b5726a6962f2503c6bbdd6d801d20b5a", kill_on_drop: false }`
[INFO] [stdout] 9c826a293bd68f96a7e6d92d247accf4b5726a6962f2503c6bbdd6d801d20b5a