[INFO] fetching crate matata 0.0.1...
[INFO] testing matata-0.0.1 against try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799
[INFO] extracting crate matata 0.0.1 into /workspace/builds/worker-84/source
[INFO] validating manifest of crates.io crate matata 0.0.1 on toolchain 8262275854dc0e5381c9d42d56257d94932c5a87
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate matata 0.0.1
[INFO] finished tweaking crates.io crate matata 0.0.1
[INFO] tweaked toml for crates.io crate matata 0.0.1 written to /workspace/builds/worker-84/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7043200b7626e60512d198caad8198eb523b793c90c2e33ba7cdfc1f9537874f
[INFO] running `Command { std: "docker" "start" "-a" "7043200b7626e60512d198caad8198eb523b793c90c2e33ba7cdfc1f9537874f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7043200b7626e60512d198caad8198eb523b793c90c2e33ba7cdfc1f9537874f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7043200b7626e60512d198caad8198eb523b793c90c2e33ba7cdfc1f9537874f", kill_on_drop: false }`
[INFO] [stdout] 7043200b7626e60512d198caad8198eb523b793c90c2e33ba7cdfc1f9537874f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/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" "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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2a4d1537ae7aecc4e7fb08d8071d984bdbcd6ecc185dbbc860035e923ce9605a
[INFO] running `Command { std: "docker" "start" "-a" "2a4d1537ae7aecc4e7fb08d8071d984bdbcd6ecc185dbbc860035e923ce9605a", kill_on_drop: false }`
[INFO] [stderr]    Compiling matata v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `count`
[INFO] [stdout]  --> src/utils/placeholder.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     count: i32,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.71s
[INFO] running `Command { std: "docker" "inspect" "2a4d1537ae7aecc4e7fb08d8071d984bdbcd6ecc185dbbc860035e923ce9605a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2a4d1537ae7aecc4e7fb08d8071d984bdbcd6ecc185dbbc860035e923ce9605a", kill_on_drop: false }`
[INFO] [stdout] 2a4d1537ae7aecc4e7fb08d8071d984bdbcd6ecc185dbbc860035e923ce9605a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/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" "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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bc8384688db305a798802643b890f175f58f9e614de7326d2fb7e578dc224f73
[INFO] running `Command { std: "docker" "start" "-a" "bc8384688db305a798802643b890f175f58f9e614de7326d2fb7e578dc224f73", kill_on_drop: false }`
[INFO] [stdout] warning: field is never read: `count`
[INFO] [stdout]  --> src/utils/placeholder.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     count: i32,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling matata v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `count`
[INFO] [stdout]  --> src/utils/placeholder.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 |     count: i32,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.57s
[INFO] running `Command { std: "docker" "inspect" "bc8384688db305a798802643b890f175f58f9e614de7326d2fb7e578dc224f73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc8384688db305a798802643b890f175f58f9e614de7326d2fb7e578dc224f73", kill_on_drop: false }`
[INFO] [stdout] bc8384688db305a798802643b890f175f58f9e614de7326d2fb7e578dc224f73
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-84/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" "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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 8195d7b1e1dc3afd8e9f811c7f05ae9544fe6a37efca5d27d13c0c2deb5025fa
[INFO] running `Command { std: "docker" "start" "-a" "8195d7b1e1dc3afd8e9f811c7f05ae9544fe6a37efca5d27d13c0c2deb5025fa", kill_on_drop: false }`
[INFO] [stderr] warning: field is never read: `count`
[INFO] [stderr]  --> src/utils/placeholder.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 |     count: i32,
[INFO] [stderr]   |     ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `matata` (lib) generated 1 warning
[INFO] [stderr] warning: `matata` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/matata-a9356f2ac6e5a18a)
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests matata
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "8195d7b1e1dc3afd8e9f811c7f05ae9544fe6a37efca5d27d13c0c2deb5025fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8195d7b1e1dc3afd8e9f811c7f05ae9544fe6a37efca5d27d13c0c2deb5025fa", kill_on_drop: false }`
[INFO] [stdout] 8195d7b1e1dc3afd8e9f811c7f05ae9544fe6a37efca5d27d13c0c2deb5025fa