[INFO] cloning repository https://github.com/mobile32/rust_experiments
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/mobile32/rust_experiments" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmobile32%2Frust_experiments", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmobile32%2Frust_experiments'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2f2935f316844927adc984a1172ed2439d2c1574
[INFO] testing mobile32/rust_experiments against try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmobile32%2Frust_experiments" "/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/mobile32/rust_experiments on toolchain 8262275854dc0e5381c9d42d56257d94932c5a87
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/mobile32/rust_experiments
[INFO] finished tweaking git repo https://github.com/mobile32/rust_experiments
[INFO] tweaked toml for git repo https://github.com/mobile32/rust_experiments written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/mobile32/rust_experiments already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "fetch" "--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0d364edccdba5b65e531dd83834866845cbf258bf12c5072f603d9c7634888c0
[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" "0d364edccdba5b65e531dd83834866845cbf258bf12c5072f603d9c7634888c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0d364edccdba5b65e531dd83834866845cbf258bf12c5072f603d9c7634888c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0d364edccdba5b65e531dd83834866845cbf258bf12c5072f603d9c7634888c0", kill_on_drop: false }`
[INFO] [stdout] 0d364edccdba5b65e531dd83834866845cbf258bf12c5072f603d9c7634888c0
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b840ebdb789a0edd872201f65fb0445c638846fea25f2c8beb4bdb1d26663073
[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" "b840ebdb789a0edd872201f65fb0445c638846fea25f2c8beb4bdb1d26663073", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_experiments v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `Stats`
[INFO] [stdout]  --> src/calculus.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Stats {
[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: `create`
[INFO] [stdout]   --> src/calculus.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn create(numbers: Vec<i32>) -> Stats {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `show_results`
[INFO] [stdout]   --> src/calculus.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn show_results(&self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mean`
[INFO] [stdout]   --> src/calculus.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn mean(&self) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `median`
[INFO] [stdout]   --> src/calculus.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn median(&self) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mode`
[INFO] [stdout]   --> src/calculus.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn mode(&self) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `collect_employees`
[INFO] [stdout]  --> src/employees.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn collect_employees() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `convert_to_pig_latin`
[INFO] [stdout]  --> src/pig_latin.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn convert_to_pig_latin(word: &str) -> String {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.60s
[INFO] running `Command { std: "docker" "inspect" "b840ebdb789a0edd872201f65fb0445c638846fea25f2c8beb4bdb1d26663073", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b840ebdb789a0edd872201f65fb0445c638846fea25f2c8beb4bdb1d26663073", kill_on_drop: false }`
[INFO] [stdout] b840ebdb789a0edd872201f65fb0445c638846fea25f2c8beb4bdb1d26663073
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e238c1bf46c20a59d197aa51b332d6e23820d4400b10ea01ed3fcd6d94684b31
[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" "e238c1bf46c20a59d197aa51b332d6e23820d4400b10ea01ed3fcd6d94684b31", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_experiments v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct is never constructed: `Stats`
[INFO] [stdout]  --> src/calculus.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Stats {
[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: `create`
[INFO] [stdout]   --> src/calculus.rs:13:12
[INFO] [stdout]    |
[INFO] [stdout] 13 |     pub fn create(numbers: Vec<i32>) -> Stats {
[INFO] [stdout]    |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `show_results`
[INFO] [stdout]   --> src/calculus.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn show_results(&self) {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mean`
[INFO] [stdout]   --> src/calculus.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 |     fn mean(&self) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `median`
[INFO] [stdout]   --> src/calculus.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 |     fn median(&self) {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `mode`
[INFO] [stdout]   --> src/calculus.rs:53:8
[INFO] [stdout]    |
[INFO] [stdout] 53 |     fn mode(&self) {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `collect_employees`
[INFO] [stdout]  --> src/employees.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn collect_employees() {
[INFO] [stdout]   |        ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `convert_to_pig_latin`
[INFO] [stdout]  --> src/pig_latin.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn convert_to_pig_latin(word: &str) -> String {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.86s
[INFO] running `Command { std: "docker" "inspect" "e238c1bf46c20a59d197aa51b332d6e23820d4400b10ea01ed3fcd6d94684b31", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e238c1bf46c20a59d197aa51b332d6e23820d4400b10ea01ed3fcd6d94684b31", kill_on_drop: false }`
[INFO] [stdout] e238c1bf46c20a59d197aa51b332d6e23820d4400b10ea01ed3fcd6d94684b31
[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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "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] b3d59ac8676866329090cad187d9e1183a9c8baa97821a69baa60b8ae16def95
[INFO] running `Command { std: "docker" "start" "-a" "b3d59ac8676866329090cad187d9e1183a9c8baa97821a69baa60b8ae16def95", kill_on_drop: false }`
[INFO] [stderr] warning: struct is never constructed: `Stats`
[INFO] [stderr]  --> src/calculus.rs:4:12
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub struct Stats {
[INFO] [stderr]   |            ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `create`
[INFO] [stderr]   --> src/calculus.rs:13:12
[INFO] [stderr]    |
[INFO] [stderr] 13 |     pub fn create(numbers: Vec<i32>) -> Stats {
[INFO] [stderr]    |            ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `show_results`
[INFO] [stderr]   --> src/calculus.rs:23:12
[INFO] [stderr]    |
[INFO] [stderr] 23 |     pub fn show_results(&self) {
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `mean`
[INFO] [stderr]   --> src/calculus.rs:37:8
[INFO] [stderr]    |
[INFO] [stderr] 37 |     fn mean(&self) {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `median`
[INFO] [stderr]   --> src/calculus.rs:42:8
[INFO] [stderr]    |
[INFO] [stderr] 42 |     fn median(&self) {
[INFO] [stderr]    |        ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: associated function is never used: `mode`
[INFO] [stderr]   --> src/calculus.rs:53:8
[INFO] [stderr]    |
[INFO] [stderr] 53 |     fn mode(&self) {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `collect_employees`
[INFO] [stderr]  --> src/employees.rs:3:8
[INFO] [stderr]   |
[INFO] [stderr] 3 | pub fn collect_employees() {
[INFO] [stderr]   |        ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `convert_to_pig_latin`
[INFO] [stderr]  --> src/pig_latin.rs:1:4
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn convert_to_pig_latin(word: &str) -> String {
[INFO] [stderr]   |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_experiments` (bin "rust_experiments" test) generated 8 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_experiments-ca7b8908488d1268)
[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" "b3d59ac8676866329090cad187d9e1183a9c8baa97821a69baa60b8ae16def95", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3d59ac8676866329090cad187d9e1183a9c8baa97821a69baa60b8ae16def95", kill_on_drop: false }`
[INFO] [stdout] b3d59ac8676866329090cad187d9e1183a9c8baa97821a69baa60b8ae16def95