[INFO] updating cached repository https://github.com/Cancain/rust_udemy_continued
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 62353149af855790cb34d491f685a8be3e9c021c
[INFO] checking Cancain/rust_udemy_continued against try#85cc1486e1f000dce4bb8e1b3cfab2b654b102a8 for pr-73323
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCancain%2Frust_udemy_continued" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Cancain/rust_udemy_continued on toolchain 85cc1486e1f000dce4bb8e1b3cfab2b654b102a8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Cancain/rust_udemy_continued
[INFO] finished tweaking git repo https://github.com/Cancain/rust_udemy_continued
[INFO] tweaked toml for git repo https://github.com/Cancain/rust_udemy_continued written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/Cancain/rust_udemy_continued already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "metadata" "--no-deps" "--format-version=1", 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] 98b144c5d2be7177a7d1c2ea1bb413aec53b6baad8df73f896f0ddbfe751c30f
[INFO] running `Command { std: "docker" "start" "-a" "98b144c5d2be7177a7d1c2ea1bb413aec53b6baad8df73f896f0ddbfe751c30f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "98b144c5d2be7177a7d1c2ea1bb413aec53b6baad8df73f896f0ddbfe751c30f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98b144c5d2be7177a7d1c2ea1bb413aec53b6baad8df73f896f0ddbfe751c30f", kill_on_drop: false }`
[INFO] [stdout] 98b144c5d2be7177a7d1c2ea1bb413aec53b6baad8df73f896f0ddbfe751c30f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+85cc1486e1f000dce4bb8e1b3cfab2b654b102a8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b6cbc0e8345d2fd0dab207487788ce14f7e0b411cd3e2955bc33debbfb634ca6
[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" "b6cbc0e8345d2fd0dab207487788ce14f7e0b411cd3e2955bc33debbfb634ca6", kill_on_drop: false }`
[INFO] [stderr]     Checking udemy_tutorial v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `my_line`
[INFO] [stdout]   --> src/data_structures/structs.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let my_line = Line {start: p, end: p2};
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_line`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `my_line`
[INFO] [stdout]   --> src/data_structures/structs.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let my_line = Line {start: p, end: p2};
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_my_line`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Color`
[INFO] [stdout]  --> src/data_structures/enumerations.rs:1:6
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum Color {
[INFO] [stdout]   |      ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `enums`
[INFO] [stdout]  --> src/data_structures/enumerations.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn enums() {   
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Point`
[INFO] [stdout]  --> src/data_structures/structs.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Point {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Line`
[INFO] [stdout]  --> src/data_structures/structs.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Line {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `structs`
[INFO] [stdout]   --> src/data_structures/structs.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub fn structs() {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: union is never used: `IntOrFloat`
[INFO] [stdout]  --> src/data_structures/unions.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | union IntOrFloat {
[INFO] [stdout]   |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `process_value`
[INFO] [stdout]  --> src/data_structures/unions.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn process_value(iof: IntOrFloat) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `unions`
[INFO] [stdout]   --> src/data_structures/unions.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn unions() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `option`
[INFO] [stdout]  --> src/data_structures/option.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn option() {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum is never used: `Color`
[INFO] [stdout]  --> src/data_structures/enumerations.rs:1:6
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum Color {
[INFO] [stdout]   |      ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `enums`
[INFO] [stdout]  --> src/data_structures/enumerations.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | pub fn enums() {   
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Point`
[INFO] [stdout]  --> src/data_structures/structs.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Point {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Line`
[INFO] [stdout]  --> src/data_structures/structs.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | struct Line {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `structs`
[INFO] [stdout]   --> src/data_structures/structs.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub fn structs() {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: union is never used: `IntOrFloat`
[INFO] [stdout]  --> src/data_structures/unions.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | union IntOrFloat {
[INFO] [stdout]   |       ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `process_value`
[INFO] [stdout]  --> src/data_structures/unions.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn process_value(iof: IntOrFloat) {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `unions`
[INFO] [stdout]   --> src/data_structures/unions.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub fn unions() {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `option`
[INFO] [stdout]  --> src/data_structures/option.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn option() {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.60s
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "b6cbc0e8345d2fd0dab207487788ce14f7e0b411cd3e2955bc33debbfb634ca6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6cbc0e8345d2fd0dab207487788ce14f7e0b411cd3e2955bc33debbfb634ca6", kill_on_drop: false }`
[INFO] [stdout] b6cbc0e8345d2fd0dab207487788ce14f7e0b411cd3e2955bc33debbfb634ca6