[INFO] cloning repository https://github.com/herr-derlowe/chapter_6_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/herr-derlowe/chapter_6_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fherr-derlowe%2Fchapter_6_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fherr-derlowe%2Fchapter_6_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 69c3ba5ac7efdee6ece76e7df1912f475ace5be5
[INFO] testing herr-derlowe/chapter_6_rust against master#caccb4d0368bd918ef6668af8e13834d07040417 for pr-146098-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fherr-derlowe%2Fchapter_6_rust" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/herr-derlowe/chapter_6_rust
[INFO] finished tweaking git repo https://github.com/herr-derlowe/chapter_6_rust
[INFO] tweaked toml for git repo https://github.com/herr-derlowe/chapter_6_rust written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/herr-derlowe/chapter_6_rust on toolchain caccb4d0368bd918ef6668af8e13834d07040417
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/herr-derlowe/chapter_6_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" "+caccb4d0368bd918ef6668af8e13834d07040417" "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-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "+caccb4d0368bd918ef6668af8e13834d07040417" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2db814a54a1759dd71d9702873ce04dad838e75ad414bd388827aedf540df68b
[INFO] running `Command { std: "docker" "start" "-a" "2db814a54a1759dd71d9702873ce04dad838e75ad414bd388827aedf540df68b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2db814a54a1759dd71d9702873ce04dad838e75ad414bd388827aedf540df68b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2db814a54a1759dd71d9702873ce04dad838e75ad414bd388827aedf540df68b", kill_on_drop: false }`
[INFO] [stdout] 2db814a54a1759dd71d9702873ce04dad838e75ad414bd388827aedf540df68b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "+caccb4d0368bd918ef6668af8e13834d07040417" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6cb850288f0900be8b0741e0875354f548eb6c2be30cf81f122fda32600a388f
[INFO] running `Command { std: "docker" "start" "-a" "6cb850288f0900be8b0741e0875354f548eb6c2be30cf81f122fda32600a388f", kill_on_drop: false }`
[INFO] [stderr]    Compiling chapter_6_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::option`
[INFO] [stdout]  --> src/chapter6.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::option;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/chapter6.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Write(String),
[INFO] [stdout]   |     ----- ^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[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 -     Write(String),
[INFO] [stdout] 6 +     Write(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Quit`, `Move`, and `ChangeColor` are never constructed
[INFO] [stdout]  --> src/chapter6.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum Message {
[INFO] [stdout]   |      ------- variants in this enum
[INFO] [stdout] 4 |     Quit,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 5 |     Move { x: i32, y: i32 },
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 6 |     Write(String),
[INFO] [stdout] 7 |     ChangeColor(i32, i32, i32),
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Orange` and `Purple` are never constructed
[INFO] [stdout]   --> src/chapter6.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | enum Color {
[INFO] [stdout]    |      ----- variants in this enum
[INFO] [stdout] 35 |     Green,
[INFO] [stdout] 36 |     Orange,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 37 |     Purple
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Alaska` is never constructed
[INFO] [stdout]   --> src/chapter6.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub enum UsState {
[INFO] [stdout]    |          ------- variant in this enum
[INFO] [stdout] 53 |     Alabama,
[INFO] [stdout] 54 |     Alaska,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `UsState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Nickel` and `Dime` are never constructed
[INFO] [stdout]   --> src/chapter6.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub enum Coin {
[INFO] [stdout]    |          ---- variants in this enum
[INFO] [stdout] 59 |     Penny,
[INFO] [stdout] 60 |     Nickel,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 61 |     Dime,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.14s
[INFO] running `Command { std: "docker" "inspect" "6cb850288f0900be8b0741e0875354f548eb6c2be30cf81f122fda32600a388f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6cb850288f0900be8b0741e0875354f548eb6c2be30cf81f122fda32600a388f", kill_on_drop: false }`
[INFO] [stdout] 6cb850288f0900be8b0741e0875354f548eb6c2be30cf81f122fda32600a388f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "+caccb4d0368bd918ef6668af8e13834d07040417" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 69aec056872e2c4cbade41fdaeb98daafd56a79183a08554013ce86b2006a265
[INFO] running `Command { std: "docker" "start" "-a" "69aec056872e2c4cbade41fdaeb98daafd56a79183a08554013ce86b2006a265", kill_on_drop: false }`
[INFO] [stderr]    Compiling chapter_6_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::option`
[INFO] [stdout]  --> src/chapter6.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::option;
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/chapter6.rs:6:11
[INFO] [stdout]   |
[INFO] [stdout] 6 |     Write(String),
[INFO] [stdout]   |     ----- ^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[INFO] [stdout]   |
[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 -     Write(String),
[INFO] [stdout] 6 +     Write(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Quit`, `Move`, and `ChangeColor` are never constructed
[INFO] [stdout]  --> src/chapter6.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum Message {
[INFO] [stdout]   |      ------- variants in this enum
[INFO] [stdout] 4 |     Quit,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 5 |     Move { x: i32, y: i32 },
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 6 |     Write(String),
[INFO] [stdout] 7 |     ChangeColor(i32, i32, i32),
[INFO] [stdout]   |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Orange` and `Purple` are never constructed
[INFO] [stdout]   --> src/chapter6.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | enum Color {
[INFO] [stdout]    |      ----- variants in this enum
[INFO] [stdout] 35 |     Green,
[INFO] [stdout] 36 |     Orange,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 37 |     Purple
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Alaska` is never constructed
[INFO] [stdout]   --> src/chapter6.rs:54:5
[INFO] [stdout]    |
[INFO] [stdout] 52 | pub enum UsState {
[INFO] [stdout]    |          ------- variant in this enum
[INFO] [stdout] 53 |     Alabama,
[INFO] [stdout] 54 |     Alaska,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `UsState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Nickel` and `Dime` are never constructed
[INFO] [stdout]   --> src/chapter6.rs:60:5
[INFO] [stdout]    |
[INFO] [stdout] 58 | pub enum Coin {
[INFO] [stdout]    |          ---- variants in this enum
[INFO] [stdout] 59 |     Penny,
[INFO] [stdout] 60 |     Nickel,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 61 |     Dime,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "69aec056872e2c4cbade41fdaeb98daafd56a79183a08554013ce86b2006a265", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "69aec056872e2c4cbade41fdaeb98daafd56a79183a08554013ce86b2006a265", kill_on_drop: false }`
[INFO] [stdout] 69aec056872e2c4cbade41fdaeb98daafd56a79183a08554013ce86b2006a265
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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" "+caccb4d0368bd918ef6668af8e13834d07040417" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 57931f8f3c58b0a1ceb898a165712115515d59b4692cb0fb6aae7b9656edef5c
[INFO] running `Command { std: "docker" "start" "-a" "57931f8f3c58b0a1ceb898a165712115515d59b4692cb0fb6aae7b9656edef5c", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::option`
[INFO] [stderr]  --> src/chapter6.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::option;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field `0` is never read
[INFO] [stderr]  --> src/chapter6.rs:6:11
[INFO] [stderr]   |
[INFO] [stderr] 6 |     Write(String),
[INFO] [stderr]   |     ----- ^^^^^^
[INFO] [stderr]   |     |
[INFO] [stderr]   |     field in this variant
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stderr]   |
[INFO] [stderr] 6 -     Write(String),
[INFO] [stderr] 6 +     Write(()),
[INFO] [stderr]   |
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Quit`, `Move`, and `ChangeColor` are never constructed
[INFO] [stderr]  --> src/chapter6.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | enum Message {
[INFO] [stderr]   |      ------- variants in this enum
[INFO] [stderr] 4 |     Quit,
[INFO] [stderr]   |     ^^^^
[INFO] [stderr] 5 |     Move { x: i32, y: i32 },
[INFO] [stderr]   |     ^^^^
[INFO] [stderr] 6 |     Write(String),
[INFO] [stderr] 7 |     ChangeColor(i32, i32, i32),
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Orange` and `Purple` are never constructed
[INFO] [stderr]   --> src/chapter6.rs:36:5
[INFO] [stderr]    |
[INFO] [stderr] 34 | enum Color {
[INFO] [stderr]    |      ----- variants in this enum
[INFO] [stderr] 35 |     Green,
[INFO] [stderr] 36 |     Orange,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 37 |     Purple
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant `Alaska` is never constructed
[INFO] [stderr]   --> src/chapter6.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 52 | pub enum UsState {
[INFO] [stderr]    |          ------- variant in this enum
[INFO] [stderr] 53 |     Alabama,
[INFO] [stderr] 54 |     Alaska,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `UsState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Nickel` and `Dime` are never constructed
[INFO] [stderr]   --> src/chapter6.rs:60:5
[INFO] [stderr]    |
[INFO] [stderr] 58 | pub enum Coin {
[INFO] [stderr]    |          ---- variants in this enum
[INFO] [stderr] 59 |     Penny,
[INFO] [stderr] 60 |     Nickel,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr] 61 |     Dime,
[INFO] [stderr]    |     ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `chapter_6_rust` (bin "chapter_6_rust" test) generated 6 warnings (run `cargo fix --bin "chapter_6_rust" --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/chapter_6_rust-3335917da6dea85b)
[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" "57931f8f3c58b0a1ceb898a165712115515d59b4692cb0fb6aae7b9656edef5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57931f8f3c58b0a1ceb898a165712115515d59b4692cb0fb6aae7b9656edef5c", kill_on_drop: false }`
[INFO] [stdout] 57931f8f3c58b0a1ceb898a165712115515d59b4692cb0fb6aae7b9656edef5c