[INFO] cloning repository https://github.com/qookei/mcf
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/qookei/mcf" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqookei%2Fmcf", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqookei%2Fmcf'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 295abc0eae1de41e3c3da9c58ce3f1136aedbee8
[INFO] testing qookei/mcf against master#a77da2d454e6caa227a85b16410b95f93495e7e0 for pr-91031
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fqookei%2Fmcf" "/workspace/builds/worker-3/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/qookei/mcf on toolchain a77da2d454e6caa227a85b16410b95f93495e7e0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-3/source/rust-toolchain.toml
[INFO] started tweaking git repo https://github.com/qookei/mcf
[INFO] finished tweaking git repo https://github.com/qookei/mcf
[INFO] tweaked toml for git repo https://github.com/qookei/mcf written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/qookei/mcf already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f276c6d6aeaa81f59107bcada0c5aa53347ec8c29f0b0243c314ef5c12b13935
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f276c6d6aeaa81f59107bcada0c5aa53347ec8c29f0b0243c314ef5c12b13935", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f276c6d6aeaa81f59107bcada0c5aa53347ec8c29f0b0243c314ef5c12b13935", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f276c6d6aeaa81f59107bcada0c5aa53347ec8c29f0b0243c314ef5c12b13935", kill_on_drop: false }`
[INFO] [stdout] f276c6d6aeaa81f59107bcada0c5aa53347ec8c29f0b0243c314ef5c12b13935
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7eec504818b9b1e51c2f35d6990c8c22b79521866f88d151be39e998b0759d94
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "7eec504818b9b1e51c2f35d6990c8c22b79521866f88d151be39e998b0759d94", kill_on_drop: false }`
[INFO] [stderr]    Compiling mcf v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `var`
[INFO] [stdout]   --> src/main.rs:40:14
[INFO] [stdout]    |
[INFO] [stdout] 40 |     VariableRef{var: String},
[INFO] [stdout]    |                 ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]   --> src/main.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     FnCall{name: String, args: Vec<Expr>},
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `args`
[INFO] [stdout]   --> src/main.rs:43:23
[INFO] [stdout]    |
[INFO] [stdout] 43 |     FnCall{name: String, args: Vec<Expr>},
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `args`
[INFO] [stdout]   --> src/main.rs:44:7
[INFO] [stdout]    |
[INFO] [stdout] 44 |     Args{args: Vec<Expr>},
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]   --> src/main.rs:45:11
[INFO] [stdout]    |
[INFO] [stdout] 45 |     DefineFn{name: String, args: Box<Expr>, body: Box<Expr>},
[INFO] [stdout]    |              ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `args`
[INFO] [stdout]   --> src/main.rs:45:25
[INFO] [stdout]    |
[INFO] [stdout] 45 |     DefineFn{name: String, args: Box<Expr>, body: Box<Expr>},
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `body`
[INFO] [stdout]   --> src/main.rs:45:42
[INFO] [stdout]    |
[INFO] [stdout] 45 |     DefineFn{name: String, args: Box<Expr>, body: Box<Expr>},
[INFO] [stdout]    |                                             ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `exprs`
[INFO] [stdout]   --> src/main.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 46 |     Do{exprs: Vec<Expr>},
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]   --> src/main.rs:47:6
[INFO] [stdout]    |
[INFO] [stdout] 47 |     Let{name: String, r#type: String},
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `type`
[INFO] [stdout]   --> src/main.rs:47:20
[INFO] [stdout]    |
[INFO] [stdout] 47 |     Let{name: String, r#type: String},
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.13s
[INFO] running `Command { std: "docker" "inspect" "7eec504818b9b1e51c2f35d6990c8c22b79521866f88d151be39e998b0759d94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7eec504818b9b1e51c2f35d6990c8c22b79521866f88d151be39e998b0759d94", kill_on_drop: false }`
[INFO] [stdout] 7eec504818b9b1e51c2f35d6990c8c22b79521866f88d151be39e998b0759d94
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0f853ed32a847b6ee13e0ef12aa49863c8bf26cf5674fcb70ec3b4ef50759d3b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "0f853ed32a847b6ee13e0ef12aa49863c8bf26cf5674fcb70ec3b4ef50759d3b", kill_on_drop: false }`
[INFO] [stderr]    Compiling mcf v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `var`
[INFO] [stdout]   --> src/main.rs:40:14
[INFO] [stdout]    |
[INFO] [stdout] 40 |     VariableRef{var: String},
[INFO] [stdout]    |                 ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]   --> src/main.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     FnCall{name: String, args: Vec<Expr>},
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `args`
[INFO] [stdout]   --> src/main.rs:43:23
[INFO] [stdout]    |
[INFO] [stdout] 43 |     FnCall{name: String, args: Vec<Expr>},
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `args`
[INFO] [stdout]   --> src/main.rs:44:7
[INFO] [stdout]    |
[INFO] [stdout] 44 |     Args{args: Vec<Expr>},
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]   --> src/main.rs:45:11
[INFO] [stdout]    |
[INFO] [stdout] 45 |     DefineFn{name: String, args: Box<Expr>, body: Box<Expr>},
[INFO] [stdout]    |              ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `args`
[INFO] [stdout]   --> src/main.rs:45:25
[INFO] [stdout]    |
[INFO] [stdout] 45 |     DefineFn{name: String, args: Box<Expr>, body: Box<Expr>},
[INFO] [stdout]    |                            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `body`
[INFO] [stdout]   --> src/main.rs:45:42
[INFO] [stdout]    |
[INFO] [stdout] 45 |     DefineFn{name: String, args: Box<Expr>, body: Box<Expr>},
[INFO] [stdout]    |                                             ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `exprs`
[INFO] [stdout]   --> src/main.rs:46:5
[INFO] [stdout]    |
[INFO] [stdout] 46 |     Do{exprs: Vec<Expr>},
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `name`
[INFO] [stdout]   --> src/main.rs:47:6
[INFO] [stdout]    |
[INFO] [stdout] 47 |     Let{name: String, r#type: String},
[INFO] [stdout]    |         ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `type`
[INFO] [stdout]   --> src/main.rs:47:20
[INFO] [stdout]    |
[INFO] [stdout] 47 |     Let{name: String, r#type: String},
[INFO] [stdout]    |                       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.84s
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "0f853ed32a847b6ee13e0ef12aa49863c8bf26cf5674fcb70ec3b4ef50759d3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0f853ed32a847b6ee13e0ef12aa49863c8bf26cf5674fcb70ec3b4ef50759d3b", kill_on_drop: false }`
[INFO] [stdout] 0f853ed32a847b6ee13e0ef12aa49863c8bf26cf5674fcb70ec3b4ef50759d3b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+a77da2d454e6caa227a85b16410b95f93495e7e0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2f8c24b71d043b475511d2df15ed535bdaaa3e6e8c22fa14a8fa1218f15e2846
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2f8c24b71d043b475511d2df15ed535bdaaa3e6e8c22fa14a8fa1218f15e2846", kill_on_drop: false }`
[INFO] [stderr] warning: field is never read: `var`
[INFO] [stderr]   --> src/main.rs:40:14
[INFO] [stderr]    |
[INFO] [stderr] 40 |     VariableRef{var: String},
[INFO] [stderr]    |                 ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `name`
[INFO] [stderr]   --> src/main.rs:43:9
[INFO] [stderr]    |
[INFO] [stderr] 43 |     FnCall{name: String, args: Vec<Expr>},
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `args`
[INFO] [stderr]   --> src/main.rs:43:23
[INFO] [stderr]    |
[INFO] [stderr] 43 |     FnCall{name: String, args: Vec<Expr>},
[INFO] [stderr]    |                          ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `args`
[INFO] [stderr]   --> src/main.rs:44:7
[INFO] [stderr]    |
[INFO] [stderr] 44 |     Args{args: Vec<Expr>},
[INFO] [stderr]    |          ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `name`
[INFO] [stderr]   --> src/main.rs:45:11
[INFO] [stderr]    |
[INFO] [stderr] 45 |     DefineFn{name: String, args: Box<Expr>, body: Box<Expr>},
[INFO] [stderr]    |              ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `args`
[INFO] [stderr]   --> src/main.rs:45:25
[INFO] [stderr]    |
[INFO] [stderr] 45 |     DefineFn{name: String, args: Box<Expr>, body: Box<Expr>},
[INFO] [stderr]    |                            ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `body`
[INFO] [stderr]   --> src/main.rs:45:42
[INFO] [stderr]    |
[INFO] [stderr] 45 |     DefineFn{name: String, args: Box<Expr>, body: Box<Expr>},
[INFO] [stderr]    |                                             ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `exprs`
[INFO] [stderr]   --> src/main.rs:46:5
[INFO] [stderr]    |
[INFO] [stderr] 46 |     Do{exprs: Vec<Expr>},
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `name`
[INFO] [stderr]   --> src/main.rs:47:6
[INFO] [stderr]    |
[INFO] [stderr] 47 |     Let{name: String, r#type: String},
[INFO] [stderr]    |         ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never read: `type`
[INFO] [stderr]   --> src/main.rs:47:20
[INFO] [stderr]    |
[INFO] [stderr] 47 |     Let{name: String, r#type: String},
[INFO] [stderr]    |                       ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `mcf` (bin "mcf" test) generated 10 warnings
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/mcf-b851b6a250e04c3f)
[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" "2f8c24b71d043b475511d2df15ed535bdaaa3e6e8c22fa14a8fa1218f15e2846", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2f8c24b71d043b475511d2df15ed535bdaaa3e6e8c22fa14a8fa1218f15e2846", kill_on_drop: false }`
[INFO] [stdout] 2f8c24b71d043b475511d2df15ed535bdaaa3e6e8c22fa14a8fa1218f15e2846