[INFO] cloning repository https://github.com/modeverv/rustbook_sec7_20190605
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/modeverv/rustbook_sec7_20190605" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmodeverv%2Frustbook_sec7_20190605", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmodeverv%2Frustbook_sec7_20190605'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c344b13209e109213cc78731be550c82a080ce1f
[INFO] checking modeverv/rustbook_sec7_20190605 against try#2c4819a380dbddb1f2a0f4405a49fb6ed90983ae for pr-152996
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmodeverv%2Frustbook_sec7_20190605" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/modeverv/rustbook_sec7_20190605
[INFO] finished tweaking git repo https://github.com/modeverv/rustbook_sec7_20190605
[INFO] tweaked toml for git repo https://github.com/modeverv/rustbook_sec7_20190605 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/modeverv/rustbook_sec7_20190605 on toolchain 2c4819a380dbddb1f2a0f4405a49fb6ed90983ae
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+2c4819a380dbddb1f2a0f4405a49fb6ed90983ae" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/modeverv/rustbook_sec7_20190605 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" "+2c4819a380dbddb1f2a0f4405a49fb6ed90983ae" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+2c4819a380dbddb1f2a0f4405a49fb6ed90983ae" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8b0923d68546a7c579874b9e308859f3c9bc8c8004225d6c5a618985068d5de5
[INFO] running `Command { std: "docker" "start" "-a" "8b0923d68546a7c579874b9e308859f3c9bc8c8004225d6c5a618985068d5de5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8b0923d68546a7c579874b9e308859f3c9bc8c8004225d6c5a618985068d5de5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b0923d68546a7c579874b9e308859f3c9bc8c8004225d6c5a618985068d5de5", kill_on_drop: false }`
[INFO] [stdout] 8b0923d68546a7c579874b9e308859f3c9bc8c8004225d6c5a618985068d5de5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+2c4819a380dbddb1f2a0f4405a49fb6ed90983ae" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 76b92ad1bc45d56c57c74ce46939e3b58340d66afccb851153e5f962f80f010d
[INFO] running `Command { std: "docker" "start" "-a" "76b92ad1bc45d56c57c74ce46939e3b58340d66afccb851153e5f962f80f010d", kill_on_drop: false }`
[INFO] [stderr]     Checking rustbook_sec7_20190605 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `1` and `2` are never read
[INFO] [stdout]  --> src/main.rs:4:22
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Parent(usize, Child, Child);
[INFO] [stdout]   |        ------        ^^^^^  ^^^^^
[INFO] [stdout]   |        |
[INFO] [stdout]   |        fields in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing these fields
[INFO] [stdout]   = note: `Parent` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `1` and `2` are never read
[INFO] [stdout]  --> src/main.rs:4:22
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Parent(usize, Child, Child);
[INFO] [stdout]   |        ------        ^^^^^  ^^^^^
[INFO] [stdout]   |        |
[INFO] [stdout]   |        fields in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing these fields
[INFO] [stdout]   = note: `Parent` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:13:14
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Child(usize);
[INFO] [stdout]    |        ----- ^^^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `Child` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/sec7_6.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Parent(usize, Child);
[INFO] [stdout]   |        ------ ^^^^^  ^^^^^
[INFO] [stdout]   |        |
[INFO] [stdout]   |        fields in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing these fields
[INFO] [stdout]   = note: `Parent` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/main.rs:13:14
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Child(usize);
[INFO] [stdout]    |        ----- ^^^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        field in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing this field
[INFO] [stdout]    = note: `Child` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/sec7_6.rs:5:14
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Child(usize);
[INFO] [stdout]   |        ----- ^^^^^
[INFO] [stdout]   |        |
[INFO] [stdout]   |        field in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing this field
[INFO] [stdout]   = note: `Child` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/sec7_6.rs:2:15
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Parent(usize, Child);
[INFO] [stdout]   |        ------ ^^^^^  ^^^^^
[INFO] [stdout]   |        |
[INFO] [stdout]   |        fields in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing these fields
[INFO] [stdout]   = note: `Parent` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/sec7_6.rs:5:14
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Child(usize);
[INFO] [stdout]   |        ----- ^^^^^
[INFO] [stdout]   |        |
[INFO] [stdout]   |        field in this struct
[INFO] [stdout]   |
[INFO] [stdout]   = help: consider removing this field
[INFO] [stdout]   = note: `Child` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "76b92ad1bc45d56c57c74ce46939e3b58340d66afccb851153e5f962f80f010d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "76b92ad1bc45d56c57c74ce46939e3b58340d66afccb851153e5f962f80f010d", kill_on_drop: false }`
[INFO] [stdout] 76b92ad1bc45d56c57c74ce46939e3b58340d66afccb851153e5f962f80f010d