[INFO] cloning repository https://github.com/eda3/rust_by_example
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/eda3/rust_by_example" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feda3%2Frust_by_example", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feda3%2Frust_by_example'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9a449d7e2badfe7e8f8419e3f7fbf35ca56d922e
[INFO] checking eda3/rust_by_example against master#3aedcf06b73fc36feeebca3d579e1d2a6c40acc5 for pr-65819
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Feda3%2Frust_by_example" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/eda3/rust_by_example on toolchain 3aedcf06b73fc36feeebca3d579e1d2a6c40acc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/eda3/rust_by_example
[INFO] finished tweaking git repo https://github.com/eda3/rust_by_example
[INFO] tweaked toml for git repo https://github.com/eda3/rust_by_example written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/eda3/rust_by_example already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9246640c619b49829d915a8402dc5419aa4c7cdfbbc94a2fa17508937e33a3fd
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9246640c619b49829d915a8402dc5419aa4c7cdfbbc94a2fa17508937e33a3fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9246640c619b49829d915a8402dc5419aa4c7cdfbbc94a2fa17508937e33a3fd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9246640c619b49829d915a8402dc5419aa4c7cdfbbc94a2fa17508937e33a3fd", kill_on_drop: false }`
[INFO] [stdout] 9246640c619b49829d915a8402dc5419aa4c7cdfbbc94a2fa17508937e33a3fd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3503f970bef78c3766a8adb400260a407ecd424308542621abe31fa201ca2c9b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3503f970bef78c3766a8adb400260a407ecd424308542621abe31fa201ca2c9b", kill_on_drop: false }`
[INFO] [stderr]     Checking rust_by_example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/bin/03-2-0_enum.rs:64:7
[INFO] [stdout]    |
[INFO] [stdout] 64 |   let x = Operations::Add;
[INFO] [stdout]    |       ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Subtract`
[INFO] [stdout]   --> src/bin/03-2-0_enum.rs:29:3
[INFO] [stdout]    |
[INFO] [stdout] 29 |   Subtract,
[INFO] [stdout]    |   ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `run`
[INFO] [stdout]   --> src/bin/03-2-0_enum.rs:36:6
[INFO] [stdout]    |
[INFO] [stdout] 36 |   fn run(&self, x: i32, y: i32) -> i32 {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `UnPrintable`
[INFO] [stdout]  --> src/bin/01-2-1-0_print_debug.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct UnPrintable(i32); // -> printデバッグできない
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `UnPrintable`
[INFO] [stdout]  --> src/bin/01-2-1-0_print_debug.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct UnPrintable(i32); // -> printデバッグできない
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `S`
[INFO] [stdout]  --> src/bin/14-2-0_impl.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct S; // 具象型`S`
[INFO] [stdout]   |        ^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `GenericVal`
[INFO] [stdout]  --> src/bin/14-2-0_impl.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct GenericVal<T>(T); // ジェネリック型`GenericVal`
[INFO] [stdout]   |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/bin/03-2-0_enum.rs:64:7
[INFO] [stdout]    |
[INFO] [stdout] 64 |   let x = Operations::Add;
[INFO] [stdout]    |       ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Subtract`
[INFO] [stdout]   --> src/bin/03-2-0_enum.rs:29:3
[INFO] [stdout]    |
[INFO] [stdout] 29 |   Subtract,
[INFO] [stdout]    |   ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `run`
[INFO] [stdout]   --> src/bin/03-2-0_enum.rs:36:6
[INFO] [stdout]    |
[INFO] [stdout] 36 |   fn run(&self, x: i32, y: i32) -> i32 {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown lint: `de`
[INFO] [stdout]   --> src/bin/10-1-0_visibility.rs:76:13
[INFO] [stdout]    |
[INFO] [stdout] 76 |     #[allow(de)]
[INFO] [stdout]    |             ^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unknown_lints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `private_function`
[INFO] [stdout]  --> src/bin/10-1-0_visibility.rs:5:6
[INFO] [stdout]   |
[INFO] [stdout] 5 |   fn private_function() {
[INFO] [stdout]   |      ^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `indirect_access`
[INFO] [stdout]   --> src/bin/10-1-0_visibility.rs:15:10
[INFO] [stdout]    |
[INFO] [stdout] 15 |   pub fn indirect_access() {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `function`
[INFO] [stdout]   --> src/bin/10-1-0_visibility.rs:22:12
[INFO] [stdout]    |
[INFO] [stdout] 22 |     pub fn function() {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `public_function_in_my_mod`
[INFO] [stdout]   --> src/bin/10-1-0_visibility.rs:36:30
[INFO] [stdout]    |
[INFO] [stdout] 36 |     pub(in crate::my_mod) fn public_function_in_my_mod() {
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `public_function_in_nested`
[INFO] [stdout]   --> src/bin/10-1-0_visibility.rs:43:18
[INFO] [stdout]    |
[INFO] [stdout] 43 |     pub(self) fn public_function_in_nested() {
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `public_function_in_super_mod`
[INFO] [stdout]   --> src/bin/10-1-0_visibility.rs:49:19
[INFO] [stdout]    |
[INFO] [stdout] 49 |     pub(super) fn public_function_in_super_mod() {
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `call_public_function_in_my_mod`
[INFO] [stdout]   --> src/bin/10-1-0_visibility.rs:54:10
[INFO] [stdout]    |
[INFO] [stdout] 54 |   pub fn call_public_function_in_my_mod() {
[INFO] [stdout]    |          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `public_function_in_crate`
[INFO] [stdout]   --> src/bin/10-1-0_visibility.rs:62:17
[INFO] [stdout]    |
[INFO] [stdout] 62 |   pub(crate) fn public_function_in_crate() {
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `restricted_function`
[INFO] [stdout]   --> src/bin/10-1-0_visibility.rs:77:19
[INFO] [stdout]    |
[INFO] [stdout] 77 |     pub(crate) fn restricted_function() {
[INFO] [stdout]    |                   ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: path statement with no effect
[INFO] [stdout]  --> src/bin/07-0_expression.rs:6:3
[INFO] [stdout]   |
[INFO] [stdout] 6 |   x;
[INFO] [stdout]   |   ^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(path_statements)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]  --> src/bin/07-0_expression.rs:7:3
[INFO] [stdout]   |
[INFO] [stdout] 7 |   x + 1;
[INFO] [stdout]   |   ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused arithmetic operation that must be used
[INFO] [stdout]   --> src/bin/07-0_expression.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     2 * x;
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find value `integer` in this scope
[INFO] [stdout]   --> src/bin/02-0_primitives.rs:13:17
[INFO] [stdout]    |
[INFO] [stdout] 13 |   let default = integer = 7; // i32
[INFO] [stdout]    |                 ^^^^^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rust_by_example`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: function is never used: `printer`
[INFO] [stdout]  --> src/bin/14-4-0_bounds.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn printer<T: Display>(t: T) {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `noisy_unused_variable`
[INFO] [stdout]   --> src/bin/04-0_variable_bindings.rs:19:7
[INFO] [stdout]    |
[INFO] [stdout] 19 |   let noisy_unused_variable = 2u32;
[INFO] [stdout]    |       ^^^^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_noisy_unused_variable`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0053]: method `contains` has an incompatible type for trait
[INFO] [stdout]   --> src/bin/14-8-2-types.rs:21:32
[INFO] [stdout]    |
[INFO] [stdout] 10 |   fn contains(&self, _: Self::A, _: &Self::B) -> bool;
[INFO] [stdout]    |                         ------- type in trait
[INFO] [stdout] ...
[INFO] [stdout] 21 |   fn contains(&self, number_1: &i32, number_2: &i32) -> bool {
[INFO] [stdout]    |                                ^^^^ expected `i32`, found `&i32`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected fn pointer `fn(&Container, i32, &i32) -> _`
[INFO] [stdout]               found fn pointer `fn(&Container, &i32, &i32) -> _`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/bin/14-8-2-types.rs:50:24
[INFO] [stdout]    |
[INFO] [stdout] 50 |     container.contains(&number_1, &number_2)
[INFO] [stdout]    |                        ^^^^^^^^^
[INFO] [stdout]    |                        |
[INFO] [stdout]    |                        expected `i32`, found `&i32`
[INFO] [stdout]    |                        help: consider removing the borrow: `number_1`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0053, E0308.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0053`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "3503f970bef78c3766a8adb400260a407ecd424308542621abe31fa201ca2c9b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3503f970bef78c3766a8adb400260a407ecd424308542621abe31fa201ca2c9b", kill_on_drop: false }`
[INFO] [stdout] 3503f970bef78c3766a8adb400260a407ecd424308542621abe31fa201ca2c9b