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[INFO] [stdout] ac1eab723f744319f9dbc259652b6f2349e0a88f
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[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftommy725%2Flearning-systems-programming-in-rust" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
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[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-3-tc2/source/rust-toolchain
[INFO] started tweaking git repo https://github.com/tommy725/learning-systems-programming-in-rust
[INFO] finished tweaking git repo https://github.com/tommy725/learning-systems-programming-in-rust
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[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" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1b86015aaebec5b8fd78f44e8e1cf2f4699c7de259219c20e248e7582c6b7a7c
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[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling mio-extras v2.0.6
[INFO] [stderr]    Compiling chapter15 v0.1.0 (/opt/rustwide/workdir/chapter15)
[INFO] [stderr]    Compiling chapter16 v0.1.0 (/opt/rustwide/workdir/chapter16)
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[INFO] [stderr]    Compiling chapter1 v0.1.0 (/opt/rustwide/workdir/chapter1)
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[INFO] [stderr]    Compiling chapter2 v0.1.0 (/opt/rustwide/workdir/chapter2)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> chapter2/src/2_4_3/main.rs:6:13
[INFO] [stdout]   |
[INFO] [stdout] 6 |     IoError(std::io::Error),
[INFO] [stdout]   |     ------- ^^^^^^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `BufferError` 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] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 6 -     IoError(std::io::Error),
[INFO] [stdout] 6 +     IoError(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> chapter2/src/2_4_3/main.rs:7:14
[INFO] [stdout]   |
[INFO] [stdout] 7 |     StrError(str::Utf8Error),
[INFO] [stdout]   |     -------- ^^^^^^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `BufferError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 7 -     StrError(str::Utf8Error),
[INFO] [stdout] 7 +     StrError(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling tokio-macros v1.2.0
[INFO] [stderr]    Compiling chapter10 v0.1.0 (/opt/rustwide/workdir/chapter10)
[INFO] [stderr]    Compiling thiserror v1.0.24
[INFO] [stderr]    Compiling zip v0.5.12
[INFO] [stderr]    Compiling chapter11 v0.1.0 (/opt/rustwide/workdir/chapter11)
[INFO] [stderr]    Compiling chapter3 v0.1.0 (/opt/rustwide/workdir/chapter3)
[INFO] [stdout] warning: fields `name` and `value` are never read
[INFO] [stdout]  --> chapter3/src/3_4_3/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct HeaderOwn {
[INFO] [stdout]   |        --------- fields in this struct
[INFO] [stdout] 8 |     name: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 9 |     value: String,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `HeaderOwn` 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] [stderr]    Compiling chapter4 v0.1.0 (/opt/rustwide/workdir/chapter4)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 37.20s
[INFO] running `Command { std: "docker" "inspect" "1b86015aaebec5b8fd78f44e8e1cf2f4699c7de259219c20e248e7582c6b7a7c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b86015aaebec5b8fd78f44e8e1cf2f4699c7de259219c20e248e7582c6b7a7c", kill_on_drop: false }`
[INFO] [stdout] 1b86015aaebec5b8fd78f44e8e1cf2f4699c7de259219c20e248e7582c6b7a7c
[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" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 05f19696c3c654b77ac62ebbe7353aadcd5cc05c3b1e38819b415a2408f57212
[INFO] running `Command { std: "docker" "start" "-a" "05f19696c3c654b77ac62ebbe7353aadcd5cc05c3b1e38819b415a2408f57212", kill_on_drop: false }`
[INFO] [stderr]    Compiling chapter9 v0.1.0 (/opt/rustwide/workdir/chapter9)
[INFO] [stderr]    Compiling chapter15 v0.1.0 (/opt/rustwide/workdir/chapter15)
[INFO] [stderr]    Compiling chapter7 v0.1.0 (/opt/rustwide/workdir/chapter7)
[INFO] [stderr]    Compiling chapter2 v0.1.0 (/opt/rustwide/workdir/chapter2)
[INFO] [stderr]    Compiling chapter3 v0.1.0 (/opt/rustwide/workdir/chapter3)
[INFO] [stderr]    Compiling chapter4 v0.1.0 (/opt/rustwide/workdir/chapter4)
[INFO] [stderr]    Compiling chapter11 v0.1.0 (/opt/rustwide/workdir/chapter11)
[INFO] [stderr]    Compiling chapter10 v0.1.0 (/opt/rustwide/workdir/chapter10)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> chapter2/src/2_4_3/main.rs:6:13
[INFO] [stdout]   |
[INFO] [stdout] 6 |     IoError(std::io::Error),
[INFO] [stdout]   |     ------- ^^^^^^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `BufferError` 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] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 6 -     IoError(std::io::Error),
[INFO] [stdout] 6 +     IoError(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> chapter2/src/2_4_3/main.rs:7:14
[INFO] [stdout]   |
[INFO] [stdout] 7 |     StrError(str::Utf8Error),
[INFO] [stdout]   |     -------- ^^^^^^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `BufferError` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 7 -     StrError(str::Utf8Error),
[INFO] [stdout] 7 +     StrError(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling chapter16 v0.1.0 (/opt/rustwide/workdir/chapter16)
[INFO] [stderr]    Compiling chapter6 v0.1.0 (/opt/rustwide/workdir/chapter6)
[INFO] [stderr]    Compiling chapter1 v0.1.0 (/opt/rustwide/workdir/chapter1)
[INFO] [stderr]    Compiling chapter12 v0.1.0 (/opt/rustwide/workdir/chapter12)
[INFO] [stderr]    Compiling chapter13 v0.1.0 (/opt/rustwide/workdir/chapter13)
[INFO] [stderr]    Compiling chapter5 v0.1.0 (/opt/rustwide/workdir/chapter5)
[INFO] [stderr]    Compiling chapter8 v0.1.0 (/opt/rustwide/workdir/chapter8)
[INFO] [stderr]    Compiling chapter17 v0.1.0 (/opt/rustwide/workdir/chapter17)
[INFO] [stdout] warning: fields `name` and `value` are never read
[INFO] [stdout]  --> chapter3/src/3_4_3/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct HeaderOwn {
[INFO] [stdout]   |        --------- fields in this struct
[INFO] [stdout] 8 |     name: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 9 |     value: String,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `HeaderOwn` 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] [stderr]    Compiling appendix v0.1.0 (/opt/rustwide/workdir/appendix)
[INFO] [stderr]    Compiling chapter14 v0.1.0 (/opt/rustwide/workdir/chapter14)
[INFO] [stderr]    Compiling lib v0.1.0 (/opt/rustwide/workdir/lib)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 5.83s
[INFO] running `Command { std: "docker" "inspect" "05f19696c3c654b77ac62ebbe7353aadcd5cc05c3b1e38819b415a2408f57212", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05f19696c3c654b77ac62ebbe7353aadcd5cc05c3b1e38819b415a2408f57212", kill_on_drop: false }`
[INFO] [stdout] 05f19696c3c654b77ac62ebbe7353aadcd5cc05c3b1e38819b415a2408f57212