[INFO] cloning repository https://github.com/austinjones/rust-crashcourse
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/austinjones/rust-crashcourse" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faustinjones%2Frust-crashcourse", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faustinjones%2Frust-crashcourse'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6123e3526e9b3fd6c4219929b2daf2b4481cd009
[INFO] testing austinjones/rust-crashcourse against master#432e145bd5a974c5b6f4dd9b352891bd7502b69d for pr-87041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Faustinjones%2Frust-crashcourse" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/austinjones/rust-crashcourse on toolchain 432e145bd5a974c5b6f4dd9b352891bd7502b69d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/austinjones/rust-crashcourse
[INFO] finished tweaking git repo https://github.com/austinjones/rust-crashcourse
[INFO] tweaked toml for git repo https://github.com/austinjones/rust-crashcourse written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/austinjones/rust-crashcourse already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `default-features = [".."]` was found in [features]. Did you mean to use `default = [".."]`?
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b9fa73d98a74a94bdb4a151f12667c5115f033a5c841ef1810c7f38e25a430ed
[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" "b9fa73d98a74a94bdb4a151f12667c5115f033a5c841ef1810c7f38e25a430ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b9fa73d98a74a94bdb4a151f12667c5115f033a5c841ef1810c7f38e25a430ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b9fa73d98a74a94bdb4a151f12667c5115f033a5c841ef1810c7f38e25a430ed", kill_on_drop: false }`
[INFO] [stdout] b9fa73d98a74a94bdb4a151f12667c5115f033a5c841ef1810c7f38e25a430ed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 08d1894613a89b6c1be24a9a4c810d07fe84faa84c53f7dba4974901c0fa4e21
[INFO] running `Command { std: "docker" "start" "-a" "08d1894613a89b6c1be24a9a4c810d07fe84faa84c53f7dba4974901c0fa4e21", kill_on_drop: false }`
[INFO] [stderr] warning: `default-features = [".."]` was found in [features]. Did you mean to use `default = [".."]`?
[INFO] [stderr]    Compiling syn v1.0.38
[INFO] [stderr]    Compiling thiserror-impl v1.0.20
[INFO] [stderr]    Compiling thiserror v1.0.20
[INFO] [stderr]    Compiling rust-crashcourse v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `static_reference`
[INFO] [stdout]  --> src/lifetimes.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let static_reference = "foo";
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_static_reference`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string`
[INFO] [stdout]   --> src/lifetimes.rs:33:14
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn use_owned(string: String) {}
[INFO] [stdout]    |              ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/lifetimes.rs:56:17
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn do_something(data: &mut Vec<usize>) {
[INFO] [stdout]    |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/lifetimes.rs:60:19
[INFO] [stdout]    |
[INFO] [stdout] 60 | fn read_something(data: &Vec<usize>) {
[INFO] [stdout]    |                   ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `another_borrow`
[INFO] [stdout]   --> src/lifetimes.rs:88:9
[INFO] [stdout]    |
[INFO] [stdout] 88 |     let another_borrow = borrow.as_ref();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_another_borrow`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `extracted`
[INFO] [stdout]   --> src/lifetimes.rs:96:9
[INFO] [stdout]    |
[INFO] [stdout] 96 |     let extracted = owned_struct.into_value();
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_extracted`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]   --> src/traits.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let str: String = bar.as_foo();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]   --> src/traits.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let str: usize = bar.as_foo();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]   --> src/traits.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 68 |     let str: String = bar.associated_foo();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]    --> src/traits.rs:102:9
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let str: String = AssociatedGenericFoo::<A>::both_foo(&bar);
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]    --> src/traits.rs:103:9
[INFO] [stdout]     |
[INFO] [stdout] 103 |     let str: usize = AssociatedGenericFoo::<B>::both_foo(&bar);
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.73s
[INFO] running `Command { std: "docker" "inspect" "08d1894613a89b6c1be24a9a4c810d07fe84faa84c53f7dba4974901c0fa4e21", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "08d1894613a89b6c1be24a9a4c810d07fe84faa84c53f7dba4974901c0fa4e21", kill_on_drop: false }`
[INFO] [stdout] 08d1894613a89b6c1be24a9a4c810d07fe84faa84c53f7dba4974901c0fa4e21
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7b1e4c8cec46336afbab2d8a2d41c47ea0d0a32dcd0e60a58245d322bcfb5d3b
[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" "7b1e4c8cec46336afbab2d8a2d41c47ea0d0a32dcd0e60a58245d322bcfb5d3b", kill_on_drop: false }`
[INFO] [stderr] warning: `default-features = [".."]` was found in [features]. Did you mean to use `default = [".."]`?
[INFO] [stderr]    Compiling rust-crashcourse v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `static_reference`
[INFO] [stdout]  --> src/lifetimes.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let static_reference = "foo";
[INFO] [stdout]   |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_static_reference`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `string`
[INFO] [stdout]   --> src/lifetimes.rs:33:14
[INFO] [stdout]    |
[INFO] [stdout] 33 | fn use_owned(string: String) {}
[INFO] [stdout]    |              ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/lifetimes.rs:56:17
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn do_something(data: &mut Vec<usize>) {
[INFO] [stdout]    |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `data`
[INFO] [stdout]   --> src/lifetimes.rs:60:19
[INFO] [stdout]    |
[INFO] [stdout] 60 | fn read_something(data: &Vec<usize>) {
[INFO] [stdout]    |                   ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `another_borrow`
[INFO] [stdout]   --> src/lifetimes.rs:88:9
[INFO] [stdout]    |
[INFO] [stdout] 88 |     let another_borrow = borrow.as_ref();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_another_borrow`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `extracted`
[INFO] [stdout]   --> src/lifetimes.rs:96:9
[INFO] [stdout]    |
[INFO] [stdout] 96 |     let extracted = owned_struct.into_value();
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_extracted`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]   --> src/traits.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let str: String = bar.as_foo();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]   --> src/traits.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let str: usize = bar.as_foo();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]   --> src/traits.rs:68:9
[INFO] [stdout]    |
[INFO] [stdout] 68 |     let str: String = bar.associated_foo();
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]    --> src/traits.rs:102:9
[INFO] [stdout]     |
[INFO] [stdout] 102 |     let str: String = AssociatedGenericFoo::<A>::both_foo(&bar);
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `str`
[INFO] [stdout]    --> src/traits.rs:103:9
[INFO] [stdout]     |
[INFO] [stdout] 103 |     let str: usize = AssociatedGenericFoo::<B>::both_foo(&bar);
[INFO] [stdout]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.74s
[INFO] running `Command { std: "docker" "inspect" "7b1e4c8cec46336afbab2d8a2d41c47ea0d0a32dcd0e60a58245d322bcfb5d3b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7b1e4c8cec46336afbab2d8a2d41c47ea0d0a32dcd0e60a58245d322bcfb5d3b", kill_on_drop: false }`
[INFO] [stdout] 7b1e4c8cec46336afbab2d8a2d41c47ea0d0a32dcd0e60a58245d322bcfb5d3b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9fd0c2fbc62a2e78703cf2b4636c50ef85d6bcdc3b4f4de56c8b889d77d7fd09
[INFO] running `Command { std: "docker" "start" "-a" "9fd0c2fbc62a2e78703cf2b4636c50ef85d6bcdc3b4f4de56c8b889d77d7fd09", kill_on_drop: false }`
[INFO] [stderr] warning: `default-features = [".."]` was found in [features]. Did you mean to use `default = [".."]`?
[INFO] [stderr] warning: unused variable: `static_reference`
[INFO] [stderr]  --> src/lifetimes.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let static_reference = "foo";
[INFO] [stderr]   |         ^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_static_reference`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `string`
[INFO] [stderr]   --> src/lifetimes.rs:33:14
[INFO] [stderr]    |
[INFO] [stderr] 33 | fn use_owned(string: String) {}
[INFO] [stderr]    |              ^^^^^^ help: if this is intentional, prefix it with an underscore: `_string`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `data`
[INFO] [stderr]   --> src/lifetimes.rs:56:17
[INFO] [stderr]    |
[INFO] [stderr] 56 | fn do_something(data: &mut Vec<usize>) {
[INFO] [stderr]    |                 ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `data`
[INFO] [stderr]   --> src/lifetimes.rs:60:19
[INFO] [stderr]    |
[INFO] [stderr] 60 | fn read_something(data: &Vec<usize>) {
[INFO] [stderr]    |                   ^^^^ help: if this is intentional, prefix it with an underscore: `_data`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `another_borrow`
[INFO] [stderr]   --> src/lifetimes.rs:88:9
[INFO] [stderr]    |
[INFO] [stderr] 88 |     let another_borrow = borrow.as_ref();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_another_borrow`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `extracted`
[INFO] [stderr]   --> src/lifetimes.rs:96:9
[INFO] [stderr]    |
[INFO] [stderr] 96 |     let extracted = owned_struct.into_value();
[INFO] [stderr]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_extracted`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str`
[INFO] [stderr]   --> src/traits.rs:37:9
[INFO] [stderr]    |
[INFO] [stderr] 37 |     let str: String = bar.as_foo();
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str`
[INFO] [stderr]   --> src/traits.rs:38:9
[INFO] [stderr]    |
[INFO] [stderr] 38 |     let str: usize = bar.as_foo();
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str`
[INFO] [stderr]   --> src/traits.rs:68:9
[INFO] [stderr]    |
[INFO] [stderr] 68 |     let str: String = bar.associated_foo();
[INFO] [stderr]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str`
[INFO] [stderr]    --> src/traits.rs:102:9
[INFO] [stderr]     |
[INFO] [stderr] 102 |     let str: String = AssociatedGenericFoo::<A>::both_foo(&bar);
[INFO] [stderr]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str`
[INFO] [stderr]    --> src/traits.rs:103:9
[INFO] [stderr]     |
[INFO] [stderr] 103 |     let str: usize = AssociatedGenericFoo::<B>::both_foo(&bar);
[INFO] [stderr]     |         ^^^ help: if this is intentional, prefix it with an underscore: `_str`
[INFO] [stderr] 
[INFO] [stderr] warning: 11 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_crashcourse-9d999e45149e2ec7)
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test std_traits::tests::test_eq ... ok
[INFO] [stdout] test std_traits::tests::test_ord ... ok
[INFO] [stdout] test tests::it_works ... ok
[INFO] [stdout] test bar::tests::it_works ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.01s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9fd0c2fbc62a2e78703cf2b4636c50ef85d6bcdc3b4f4de56c8b889d77d7fd09", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9fd0c2fbc62a2e78703cf2b4636c50ef85d6bcdc3b4f4de56c8b889d77d7fd09", kill_on_drop: false }`
[INFO] [stdout] 9fd0c2fbc62a2e78703cf2b4636c50ef85d6bcdc3b4f4de56c8b889d77d7fd09