[INFO] cloning repository https://github.com/katayano/my_library
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/katayano/my_library" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkatayano%2Fmy_library", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkatayano%2Fmy_library'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] bf79b80b494f9e502b5f598d0e0a39d48cf4423a
[INFO] testing katayano/my_library against 1.95.0 for beta-1.96-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkatayano%2Fmy_library" "/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/katayano/my_library
[INFO] finished tweaking git repo https://github.com/katayano/my_library
[INFO] tweaked toml for git repo https://github.com/katayano/my_library written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/katayano/my_library on toolchain 1.95.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.95.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/katayano/my_library 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" "+1.95.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded fuzzy-matcher v0.3.7
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e3ed31b0c372e3a237b9865c740bc52bfdc5a4dc97a4d114b6b8d85deb90c32a
[INFO] running `Command { std: "docker" "start" "-a" "e3ed31b0c372e3a237b9865c740bc52bfdc5a4dc97a4d114b6b8d85deb90c32a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e3ed31b0c372e3a237b9865c740bc52bfdc5a4dc97a4d114b6b8d85deb90c32a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e3ed31b0c372e3a237b9865c740bc52bfdc5a4dc97a4d114b6b8d85deb90c32a", kill_on_drop: false }`
[INFO] [stdout] e3ed31b0c372e3a237b9865c740bc52bfdc5a4dc97a4d114b6b8d85deb90c32a
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a3f47f0c20a23cdb19f7da8996680d52aad6288bdd2f652c0bf511857d6612c9
[INFO] running `Command { std: "docker" "start" "-a" "a3f47f0c20a23cdb19f7da8996680d52aad6288bdd2f652c0bf511857d6612c9", kill_on_drop: false }`
[INFO] [stderr]    Compiling thread_local v1.1.8
[INFO] [stderr]    Compiling fuzzy-matcher v0.3.7
[INFO] [stderr]    Compiling my_library v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `book`
[INFO] [stdout]   --> src/library/bookshelf.rs:49:35
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn remove_book(&mut self, book: &Book) -> Option<Book> {
[INFO] [stdout]    |                                   ^^^^ help: if this is intentional, prefix it with an underscore: `_book`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `shelf`
[INFO] [stdout]  --> src/lib.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let shelf = library::bookshelf::Bookshelf::new();
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_shelf`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `shelf`
[INFO] [stdout]  --> src/lib.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let shelf = bookshelf::Bookshelf::new();
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_shelf`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `function_1` is never used
[INFO] [stdout]  --> src/lib.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn function_1() {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `function_2` is never used
[INFO] [stdout]  --> src/lib.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn function_2() {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `author` is never read
[INFO] [stdout]  --> src/library/book.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct Book {
[INFO] [stdout]   |            ---- field in this struct
[INFO] [stdout] 3 |     pub title: String,
[INFO] [stdout] 4 |     author: String,
[INFO] [stdout]   |     ^^^^^^
[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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.72s
[INFO] running `Command { std: "docker" "inspect" "a3f47f0c20a23cdb19f7da8996680d52aad6288bdd2f652c0bf511857d6612c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a3f47f0c20a23cdb19f7da8996680d52aad6288bdd2f652c0bf511857d6612c9", kill_on_drop: false }`
[INFO] [stdout] a3f47f0c20a23cdb19f7da8996680d52aad6288bdd2f652c0bf511857d6612c9
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 48b514e8cc56a4892951c12420b378f27b31b9781e6c3baf993904bc04d092fb
[INFO] running `Command { std: "docker" "start" "-a" "48b514e8cc56a4892951c12420b378f27b31b9781e6c3baf993904bc04d092fb", kill_on_drop: false }`
[INFO] [stdout] warning: unused variable: `book`
[INFO] [stdout]   --> src/library/bookshelf.rs:49:35
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn remove_book(&mut self, book: &Book) -> Option<Book> {
[INFO] [stdout]    |                                   ^^^^ help: if this is intentional, prefix it with an underscore: `_book`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `shelf`
[INFO] [stdout]  --> src/lib.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let shelf = library::bookshelf::Bookshelf::new();
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_shelf`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `shelf`
[INFO] [stdout]  --> src/lib.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let shelf = bookshelf::Bookshelf::new();
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_shelf`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `function_1` is never used
[INFO] [stdout]  --> src/lib.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn function_1() {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `function_2` is never used
[INFO] [stdout]  --> src/lib.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn function_2() {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `author` is never read
[INFO] [stdout]  --> src/library/book.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct Book {
[INFO] [stdout]   |            ---- field in this struct
[INFO] [stdout] 3 |     pub title: String,
[INFO] [stdout] 4 |     author: String,
[INFO] [stdout]   |     ^^^^^^
[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] [stderr]    Compiling my_library v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `book`
[INFO] [stdout]   --> src/library/bookshelf.rs:49:35
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub fn remove_book(&mut self, book: &Book) -> Option<Book> {
[INFO] [stdout]    |                                   ^^^^ help: if this is intentional, prefix it with an underscore: `_book`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `shelf`
[INFO] [stdout]  --> src/lib.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let shelf = library::bookshelf::Bookshelf::new();
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_shelf`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `shelf`
[INFO] [stdout]  --> src/lib.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let shelf = bookshelf::Bookshelf::new();
[INFO] [stdout]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_shelf`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `function_1` is never used
[INFO] [stdout]  --> src/lib.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn function_1() {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `function_2` is never used
[INFO] [stdout]  --> src/lib.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn function_2() {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `author` is never read
[INFO] [stdout]  --> src/library/book.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct Book {
[INFO] [stdout]   |            ---- field in this struct
[INFO] [stdout] 3 |     pub title: String,
[INFO] [stdout] 4 |     author: String,
[INFO] [stdout]   |     ^^^^^^
[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] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.34s
[INFO] running `Command { std: "docker" "inspect" "48b514e8cc56a4892951c12420b378f27b31b9781e6c3baf993904bc04d092fb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48b514e8cc56a4892951c12420b378f27b31b9781e6c3baf993904bc04d092fb", kill_on_drop: false }`
[INFO] [stdout] 48b514e8cc56a4892951c12420b378f27b31b9781e6c3baf993904bc04d092fb
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+1.95.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 16f044d660926b9de17b344b4d7d7cb60d7cfe405c40d1b7cf28ce247a207df1
[INFO] running `Command { std: "docker" "start" "-a" "16f044d660926b9de17b344b4d7d7cb60d7cfe405c40d1b7cf28ce247a207df1", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `book`
[INFO] [stderr]   --> src/library/bookshelf.rs:49:35
[INFO] [stderr]    |
[INFO] [stderr] 49 |     pub fn remove_book(&mut self, book: &Book) -> Option<Book> {
[INFO] [stderr]    |                                   ^^^^ help: if this is intentional, prefix it with an underscore: `_book`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `shelf`
[INFO] [stderr]  --> src/lib.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let shelf = library::bookshelf::Bookshelf::new();
[INFO] [stderr]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_shelf`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `shelf`
[INFO] [stderr]  --> src/lib.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let shelf = bookshelf::Bookshelf::new();
[INFO] [stderr]   |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_shelf`
[INFO] [stderr] 
[INFO] [stderr] warning: function `function_1` is never used
[INFO] [stderr]  --> src/lib.rs:3:4
[INFO] [stderr]   |
[INFO] [stderr] 3 | fn function_1() {
[INFO] [stderr]   |    ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `function_2` is never used
[INFO] [stderr]  --> src/lib.rs:7:4
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn function_2() {
[INFO] [stderr]   |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `author` is never read
[INFO] [stderr]  --> src/library/book.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub struct Book {
[INFO] [stderr]   |            ---- field in this struct
[INFO] [stderr] 3 |     pub title: String,
[INFO] [stderr] 4 |     author: String,
[INFO] [stderr]   |     ^^^^^^
[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: `my_library` (lib) generated 6 warnings (run `cargo fix --lib -p my_library` to apply 3 suggestions)
[INFO] [stderr] warning: `my_library` (lib test) generated 6 warnings (6 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/my_library-3d3c25ba346620cd)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test library::bookshelf::tests::test_bookshelf ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests my_library
[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" "16f044d660926b9de17b344b4d7d7cb60d7cfe405c40d1b7cf28ce247a207df1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "16f044d660926b9de17b344b4d7d7cb60d7cfe405c40d1b7cf28ce247a207df1", kill_on_drop: false }`
[INFO] [stdout] 16f044d660926b9de17b344b4d7d7cb60d7cfe405c40d1b7cf28ce247a207df1
