[INFO] cloning repository https://github.com/limeng32/MyRust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/limeng32/MyRust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flimeng32%2FMyRust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flimeng32%2FMyRust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3752cf3efdcef3e1eb1464f03a4cf29b37a7b99f
[INFO] testing limeng32/MyRust against 1.90.0 for beta-1.91-3
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Flimeng32%2FMyRust" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/limeng32/MyRust
[INFO] finished tweaking git repo https://github.com/limeng32/MyRust
[INFO] tweaked toml for git repo https://github.com/limeng32/MyRust written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/limeng32/MyRust on toolchain 1.90.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.90.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/limeng32/MyRust 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" "+1.90.0" "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-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+1.90.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b189a33f73a679c9c45d16bf3ac5a4b48e04668cbd59ccf75dfa3e1356f70cdb
[INFO] running `Command { std: "docker" "start" "-a" "b189a33f73a679c9c45d16bf3ac5a4b48e04668cbd59ccf75dfa3e1356f70cdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b189a33f73a679c9c45d16bf3ac5a4b48e04668cbd59ccf75dfa3e1356f70cdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b189a33f73a679c9c45d16bf3ac5a4b48e04668cbd59ccf75dfa3e1356f70cdb", kill_on_drop: false }`
[INFO] [stdout] b189a33f73a679c9c45d16bf3ac5a4b48e04668cbd59ccf75dfa3e1356f70cdb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.90.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1323312a60cda15d9dbde357948a2edd92971e3dc137cac19609835a38530a32
[INFO] running `Command { std: "docker" "start" "-a" "1323312a60cda15d9dbde357948a2edd92971e3dc137cac19609835a38530a32", kill_on_drop: false }`
[INFO] [stderr]    Compiling greeting v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `yy`
[INFO] [stdout]  --> src/main.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let yy = xx;
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_yy`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/main.rs:42:6
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let c: char = ' ';
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/main.rs:55:7
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let (x, y): (&str, String) = ("aa", "asd".to_string());
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/main.rs:57:6
[INFO] [stdout]    |
[INFO] [stdout] 57 |     let s = 0;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ebook`
[INFO] [stdout]   --> src/main.rs:75:6
[INFO] [stdout]    |
[INFO] [stdout] 75 |     let ebook = Book::Electronic {
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_ebook`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/main.rs:87:6
[INFO] [stdout]    |
[INFO] [stdout] 87 |     let t = Some(64);
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `a_a2` is never used
[INFO] [stdout]  --> src/main.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn a_a2(x: char, y: char) {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `UnitStruct1` is never constructed
[INFO] [stdout]   --> src/main.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct UnitStruct1;
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calculate_length` is never used
[INFO] [stdout]   --> src/main.rs:98:4
[INFO] [stdout]    |
[INFO] [stdout] 98 | fn calculate_length(s: &String) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main2` is never used
[INFO] [stdout]    --> src/main.rs:101:4
[INFO] [stdout]     |
[INFO] [stdout] 101 | fn main2() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `index` and `url` are never read
[INFO] [stdout]    --> src/main.rs:113:11
[INFO] [stdout]     |
[INFO] [stdout] 113 |     Papery { index: u32, url: String },
[INFO] [stdout]     |     ------   ^^^^^       ^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     fields in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Book` 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 `url` is never read
[INFO] [stdout]    --> src/main.rs:114:15
[INFO] [stdout]     |
[INFO] [stdout] 114 |     Electronic { url: String },
[INFO] [stdout]     |     ----------   ^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Book` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main3` is never used
[INFO] [stdout]    --> src/main.rs:116:4
[INFO] [stdout]     |
[INFO] [stdout] 116 | fn main3() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] running `Command { std: "docker" "inspect" "1323312a60cda15d9dbde357948a2edd92971e3dc137cac19609835a38530a32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1323312a60cda15d9dbde357948a2edd92971e3dc137cac19609835a38530a32", kill_on_drop: false }`
[INFO] [stdout] 1323312a60cda15d9dbde357948a2edd92971e3dc137cac19609835a38530a32
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.90.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cf35a676ced7621484ff93a132e8b9200005b09d501e809f5b3d17207f9e601d
[INFO] running `Command { std: "docker" "start" "-a" "cf35a676ced7621484ff93a132e8b9200005b09d501e809f5b3d17207f9e601d", kill_on_drop: false }`
[INFO] [stderr]    Compiling greeting v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `yy`
[INFO] [stdout]  --> src/main.rs:3:6
[INFO] [stdout]   |
[INFO] [stdout] 3 |     let yy = xx;
[INFO] [stdout]   |         ^^ help: if this is intentional, prefix it with an underscore: `_yy`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/main.rs:42:6
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let c: char = ' ';
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/main.rs:55:7
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let (x, y): (&str, String) = ("aa", "asd".to_string());
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> src/main.rs:57:6
[INFO] [stdout]    |
[INFO] [stdout] 57 |     let s = 0;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `ebook`
[INFO] [stdout]   --> src/main.rs:75:6
[INFO] [stdout]    |
[INFO] [stdout] 75 |     let ebook = Book::Electronic {
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_ebook`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> src/main.rs:87:6
[INFO] [stdout]    |
[INFO] [stdout] 87 |     let t = Some(64);
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `a_a2` is never used
[INFO] [stdout]  --> src/main.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn a_a2(x: char, y: char) {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `UnitStruct1` is never constructed
[INFO] [stdout]   --> src/main.rs:25:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | struct UnitStruct1;
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `calculate_length` is never used
[INFO] [stdout]   --> src/main.rs:98:4
[INFO] [stdout]    |
[INFO] [stdout] 98 | fn calculate_length(s: &String) -> usize {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main2` is never used
[INFO] [stdout]    --> src/main.rs:101:4
[INFO] [stdout]     |
[INFO] [stdout] 101 | fn main2() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `index` and `url` are never read
[INFO] [stdout]    --> src/main.rs:113:11
[INFO] [stdout]     |
[INFO] [stdout] 113 |     Papery { index: u32, url: String },
[INFO] [stdout]     |     ------   ^^^^^       ^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     fields in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Book` 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 `url` is never read
[INFO] [stdout]    --> src/main.rs:114:15
[INFO] [stdout]     |
[INFO] [stdout] 114 |     Electronic { url: String },
[INFO] [stdout]     |     ----------   ^^^
[INFO] [stdout]     |     |
[INFO] [stdout]     |     field in this variant
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Book` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `main3` is never used
[INFO] [stdout]    --> src/main.rs:116:4
[INFO] [stdout]     |
[INFO] [stdout] 116 | fn main3() {
[INFO] [stdout]     |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.26s
[INFO] running `Command { std: "docker" "inspect" "cf35a676ced7621484ff93a132e8b9200005b09d501e809f5b3d17207f9e601d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf35a676ced7621484ff93a132e8b9200005b09d501e809f5b3d17207f9e601d", kill_on_drop: false }`
[INFO] [stdout] cf35a676ced7621484ff93a132e8b9200005b09d501e809f5b3d17207f9e601d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "+1.90.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] c8abdd27a496cc0bb4e71d481c26a111cb56b6b9debefc966bace7a0b98302b9
[INFO] running `Command { std: "docker" "start" "-a" "c8abdd27a496cc0bb4e71d481c26a111cb56b6b9debefc966bace7a0b98302b9", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `yy`
[INFO] [stderr]  --> src/main.rs:3:6
[INFO] [stderr]   |
[INFO] [stderr] 3 |     let yy = xx;
[INFO] [stderr]   |         ^^ help: if this is intentional, prefix it with an underscore: `_yy`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `c`
[INFO] [stderr]   --> src/main.rs:42:6
[INFO] [stderr]    |
[INFO] [stderr] 42 |     let c: char = ' ';
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/main.rs:55:7
[INFO] [stderr]    |
[INFO] [stderr] 55 |     let (x, y): (&str, String) = ("aa", "asd".to_string());
[INFO] [stderr]    |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s`
[INFO] [stderr]   --> src/main.rs:57:6
[INFO] [stderr]    |
[INFO] [stderr] 57 |     let s = 0;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `ebook`
[INFO] [stderr]   --> src/main.rs:75:6
[INFO] [stderr]    |
[INFO] [stderr] 75 |     let ebook = Book::Electronic {
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_ebook`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> src/main.rs:87:6
[INFO] [stderr]    |
[INFO] [stderr] 87 |     let t = Some(64);
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr] 
[INFO] [stderr] warning: function `a_a2` is never used
[INFO] [stderr]  --> src/main.rs:1:4
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn a_a2(x: char, y: char) {
[INFO] [stderr]   |    ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct `UnitStruct1` is never constructed
[INFO] [stderr]   --> src/main.rs:25:8
[INFO] [stderr]    |
[INFO] [stderr] 25 | struct UnitStruct1;
[INFO] [stderr]    |        ^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `calculate_length` is never used
[INFO] [stderr]   --> src/main.rs:98:4
[INFO] [stderr]    |
[INFO] [stderr] 98 | fn calculate_length(s: &String) -> usize {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `main2` is never used
[INFO] [stderr]    --> src/main.rs:101:4
[INFO] [stderr]     |
[INFO] [stderr] 101 | fn main2() {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `index` and `url` are never read
[INFO] [stderr]    --> src/main.rs:113:11
[INFO] [stderr]     |
[INFO] [stderr] 113 |     Papery { index: u32, url: String },
[INFO] [stderr]     |     ------   ^^^^^       ^^^
[INFO] [stderr]     |     |
[INFO] [stderr]     |     fields in this variant
[INFO] [stderr]     |
[INFO] [stderr]     = note: `Book` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: field `url` is never read
[INFO] [stderr]    --> src/main.rs:114:15
[INFO] [stderr]     |
[INFO] [stderr] 114 |     Electronic { url: String },
[INFO] [stderr]     |     ----------   ^^^
[INFO] [stderr]     |     |
[INFO] [stderr]     |     field in this variant
[INFO] [stderr]     |
[INFO] [stderr]     = note: `Book` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: function `main3` is never used
[INFO] [stderr]    --> src/main.rs:116:4
[INFO] [stderr]     |
[INFO] [stderr] 116 | fn main3() {
[INFO] [stderr]     |    ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `greeting` (bin "greeting" test) generated 13 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/greeting-e3b78478addc639c)
[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" "c8abdd27a496cc0bb4e71d481c26a111cb56b6b9debefc966bace7a0b98302b9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c8abdd27a496cc0bb4e71d481c26a111cb56b6b9debefc966bace7a0b98302b9", kill_on_drop: false }`
[INFO] [stdout] c8abdd27a496cc0bb4e71d481c26a111cb56b6b9debefc966bace7a0b98302b9
