[INFO] cloning 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" "clone" "--bare" "https://github.com/Cancain/rust_udemy_continued" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCancain%2Frust_udemy_continued", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCancain%2Frust_udemy_continued'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 62353149af855790cb34d491f685a8be3e9c021c
[INFO] checking Cancain/rust_udemy_continued against master#4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5 for pr-81174
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FCancain%2Frust_udemy_continued" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Cancain/rust_udemy_continued on toolchain 4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "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-4/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" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 26fc6d00dcfc766e729cc0178c6704a205ff9219e28900274f9dec66f534f3f3
[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" "26fc6d00dcfc766e729cc0178c6704a205ff9219e28900274f9dec66f534f3f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "26fc6d00dcfc766e729cc0178c6704a205ff9219e28900274f9dec66f534f3f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26fc6d00dcfc766e729cc0178c6704a205ff9219e28900274f9dec66f534f3f3", kill_on_drop: false }`
[INFO] [stdout] 26fc6d00dcfc766e729cc0178c6704a205ff9219e28900274f9dec66f534f3f3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:21f1ed92105a0ef9b0d27ad8bdeb7f36f9f01ac17fffe3a3f3dc5241fc25d8f4" "/opt/rustwide/cargo-home/bin/cargo" "+4d0dd02ee07bddad9136f95c9f7846ebf3eb3fc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8a08eae5f4bd89d9123100c690c4a85a04ac967b11c19674a1e12e2b0f4206eb
[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" "8a08eae5f4bd89d9123100c690c4a85a04ac967b11c19674a1e12e2b0f4206eb", 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: 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] [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: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.37s
[INFO] running `Command { std: "docker" "inspect" "8a08eae5f4bd89d9123100c690c4a85a04ac967b11c19674a1e12e2b0f4206eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a08eae5f4bd89d9123100c690c4a85a04ac967b11c19674a1e12e2b0f4206eb", kill_on_drop: false }`
[INFO] [stdout] 8a08eae5f4bd89d9123100c690c4a85a04ac967b11c19674a1e12e2b0f4206eb