[INFO] cloning repository https://github.com/tommy725/learning-systems-programming-in-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tommy725/learning-systems-programming-in-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftommy725%2Flearning-systems-programming-in-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftommy725%2Flearning-systems-programming-in-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ac1eab723f744319f9dbc259652b6f2349e0a88f
[INFO] building tommy725/learning-systems-programming-in-rust against try#4987e9d4227139400384ab59296ffee3b0fb1183 for pr-146237-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftommy725%2Flearning-systems-programming-in-rust" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] removed /workspace/builds/worker-1-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
[INFO] tweaked toml for git repo https://github.com/tommy725/learning-systems-programming-in-rust written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/tommy725/learning-systems-programming-in-rust on toolchain 4987e9d4227139400384ab59296ffee3b0fb1183
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/tommy725/learning-systems-programming-in-rust 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" "+4987e9d4227139400384ab59296ffee3b0fb1183" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+4987e9d4227139400384ab59296ffee3b0fb1183" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 33990cdc5e0c99724e06f6da1e34056c6eb7b5dd26b5af2b43427221cc8a8109
[INFO] running `Command { std: "docker" "start" "-a" "33990cdc5e0c99724e06f6da1e34056c6eb7b5dd26b5af2b43427221cc8a8109", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "33990cdc5e0c99724e06f6da1e34056c6eb7b5dd26b5af2b43427221cc8a8109", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "33990cdc5e0c99724e06f6da1e34056c6eb7b5dd26b5af2b43427221cc8a8109", kill_on_drop: false }`
[INFO] [stdout] 33990cdc5e0c99724e06f6da1e34056c6eb7b5dd26b5af2b43427221cc8a8109
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+4987e9d4227139400384ab59296ffee3b0fb1183" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ef427a5c195f38aed737d6e593b4c365e597c10386d948bfff2f02291502caa1
[INFO] running `Command { std: "docker" "start" "-a" "ef427a5c195f38aed737d6e593b4c365e597c10386d948bfff2f02291502caa1", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.95
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling once_cell v1.7.2
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling proc-macro2 v1.0.26
[INFO] [stderr]    Compiling syn v1.0.72
[INFO] [stderr]    Compiling getrandom v0.2.2
[INFO] [stderr]    Compiling cc v1.0.67
[INFO] [stderr]    Compiling httparse v1.4.1
[INFO] [stderr]    Compiling anyhow v1.0.40
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]    Compiling doc-comment v0.3.3
[INFO] [stderr]    Compiling itoa v0.4.7
[INFO] [stderr]    Compiling sysinfo v0.18.1
[INFO] [stderr]    Compiling glob v0.3.0
[INFO] [stderr]    Compiling tokio v1.6.0
[INFO] [stderr]    Compiling bytes v1.0.1
[INFO] [stderr]    Compiling pin-project-lite v0.2.6
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling bzip2-sys v0.1.10+1.0.8
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling time v0.1.43
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling flate2 v1.0.20
[INFO] [stderr]    Compiling rand_core v0.6.2
[INFO] [stderr]    Compiling bzip2 v0.3.3
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling rand_chacha v0.3.0
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling nix v0.21.0
[INFO] [stderr]    Compiling parking_lot_core v0.8.3
[INFO] [stderr]    Compiling mio v0.7.11
[INFO] [stderr]    Compiling rand v0.8.3
[INFO] [stderr]    Compiling signal-hook-registry v1.3.0
[INFO] [stderr]    Compiling lib v0.1.0 (/opt/rustwide/workdir/lib)
[INFO] [stderr]    Compiling parking_lot v0.11.1
[INFO] [stderr]    Compiling net2 v0.2.37
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling inotify-sys v0.1.5
[INFO] [stderr]    Compiling filetime v0.2.14
[INFO] [stderr]    Compiling inotify v0.7.1
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling nix v0.20.0
[INFO] [stderr]    Compiling memmap2 v0.2.2
[INFO] [stderr]    Compiling mio-extras v2.0.6
[INFO] [stderr]    Compiling chapter7 v0.1.0 (/opt/rustwide/workdir/chapter7)
[INFO] [stderr]    Compiling thiserror-impl v1.0.24
[INFO] [stderr]    Compiling tokio-macros v1.2.0
[INFO] [stderr]    Compiling notify v4.0.17
[INFO] [stderr]    Compiling appendix v0.1.0 (/opt/rustwide/workdir/appendix)
[INFO] [stderr]    Compiling chapter17 v0.1.0 (/opt/rustwide/workdir/chapter17)
[INFO] [stderr]    Compiling chapter2 v0.1.0 (/opt/rustwide/workdir/chapter2)
[INFO] [stderr]    Compiling chapter9 v0.1.0 (/opt/rustwide/workdir/chapter9)
[INFO] [stderr]    Compiling chapter16 v0.1.0 (/opt/rustwide/workdir/chapter16)
[INFO] [stderr]    Compiling chapter5 v0.1.0 (/opt/rustwide/workdir/chapter5)
[INFO] [stderr]    Compiling chapter6 v0.1.0 (/opt/rustwide/workdir/chapter6)
[INFO] [stderr]    Compiling chapter15 v0.1.0 (/opt/rustwide/workdir/chapter15)
[INFO] [stderr]    Compiling chapter13 v0.1.0 (/opt/rustwide/workdir/chapter13)
[INFO] [stderr]    Compiling chapter14 v0.1.0 (/opt/rustwide/workdir/chapter14)
[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 v1.0.24
[INFO] [stderr]    Compiling zip v0.5.12
[INFO] [stderr]    Compiling chapter1 v0.1.0 (/opt/rustwide/workdir/chapter1)
[INFO] [stderr]    Compiling chapter8 v0.1.0 (/opt/rustwide/workdir/chapter8)
[INFO] [stderr]    Compiling chapter12 v0.1.0 (/opt/rustwide/workdir/chapter12)
[INFO] [stderr]    Compiling chapter3 v0.1.0 (/opt/rustwide/workdir/chapter3)
[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: 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 28.57s
[INFO] running `Command { std: "docker" "inspect" "ef427a5c195f38aed737d6e593b4c365e597c10386d948bfff2f02291502caa1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef427a5c195f38aed737d6e593b4c365e597c10386d948bfff2f02291502caa1", kill_on_drop: false }`
[INFO] [stdout] ef427a5c195f38aed737d6e593b4c365e597c10386d948bfff2f02291502caa1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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" "+4987e9d4227139400384ab59296ffee3b0fb1183" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f240f6342ada4a77fa226d3df59acd6446bb93ef218accf5723a812ca3b068f8
[INFO] running `Command { std: "docker" "start" "-a" "f240f6342ada4a77fa226d3df59acd6446bb93ef218accf5723a812ca3b068f8", kill_on_drop: false }`
[INFO] [stderr]    Compiling chapter7 v0.1.0 (/opt/rustwide/workdir/chapter7)
[INFO] [stderr]    Compiling chapter9 v0.1.0 (/opt/rustwide/workdir/chapter9)
[INFO] [stderr]    Compiling chapter3 v0.1.0 (/opt/rustwide/workdir/chapter3)
[INFO] [stderr]    Compiling chapter2 v0.1.0 (/opt/rustwide/workdir/chapter2)
[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: 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] [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 chapter14 v0.1.0 (/opt/rustwide/workdir/chapter14)
[INFO] [stderr]    Compiling chapter12 v0.1.0 (/opt/rustwide/workdir/chapter12)
[INFO] [stderr]    Compiling chapter1 v0.1.0 (/opt/rustwide/workdir/chapter1)
[INFO] [stderr]    Compiling chapter13 v0.1.0 (/opt/rustwide/workdir/chapter13)
[INFO] [stderr]    Compiling appendix v0.1.0 (/opt/rustwide/workdir/appendix)
[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 chapter17 v0.1.0 (/opt/rustwide/workdir/chapter17)
[INFO] [stderr]    Compiling chapter15 v0.1.0 (/opt/rustwide/workdir/chapter15)
[INFO] [stderr]    Compiling chapter8 v0.1.0 (/opt/rustwide/workdir/chapter8)
[INFO] [stderr]    Compiling chapter5 v0.1.0 (/opt/rustwide/workdir/chapter5)
[INFO] [stderr]    Compiling lib v0.1.0 (/opt/rustwide/workdir/lib)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 6.25s
[INFO] running `Command { std: "docker" "inspect" "f240f6342ada4a77fa226d3df59acd6446bb93ef218accf5723a812ca3b068f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f240f6342ada4a77fa226d3df59acd6446bb93ef218accf5723a812ca3b068f8", kill_on_drop: false }`
[INFO] [stdout] f240f6342ada4a77fa226d3df59acd6446bb93ef218accf5723a812ca3b068f8
