[INFO] cloning repository https://github.com/JonathanLorimer/learn-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JonathanLorimer/learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJonathanLorimer%2Flearn-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJonathanLorimer%2Flearn-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 78830f8917974dee3c481493866fe026bad40804
[INFO] testing JonathanLorimer/learn-rust against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJonathanLorimer%2Flearn-rust" "/workspace/builds/worker-16/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-16/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JonathanLorimer/learn-rust on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/JonathanLorimer/learn-rust
[INFO] finished tweaking git repo https://github.com/JonathanLorimer/learn-rust
[INFO] tweaked toml for git repo https://github.com/JonathanLorimer/learn-rust written to /workspace/builds/worker-16/source/Cargo.toml
[INFO] crate git repo https://github.com/JonathanLorimer/learn-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f256ddbc428913e45e95f5e8cfc677183a9e2de50e9245eca6179e819d62058e
[INFO] running `Command { std: "docker" "start" "-a" "f256ddbc428913e45e95f5e8cfc677183a9e2de50e9245eca6179e819d62058e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f256ddbc428913e45e95f5e8cfc677183a9e2de50e9245eca6179e819d62058e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f256ddbc428913e45e95f5e8cfc677183a9e2de50e9245eca6179e819d62058e", kill_on_drop: false }`
[INFO] [stdout] f256ddbc428913e45e95f5e8cfc677183a9e2de50e9245eca6179e819d62058e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] bf995a9258a8ddbfcc752c2154f9d05bb814e4f99121a8b4ccee95ae9c048222
[INFO] running `Command { std: "docker" "start" "-a" "bf995a9258a8ddbfcc752c2154f9d05bb814e4f99121a8b4ccee95ae9c048222", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.4
[INFO] [stderr]    Compiling learn-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `ref_to_nothing`
[INFO] [stdout]   --> src/ownership.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let ref_to_nothing = dangle();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ref_to_nothing`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `guessing_game`
[INFO] [stdout]   --> src/main.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn guessing_game() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `hello`
[INFO] [stdout]  --> src/ownership.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn hello(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `clone`
[INFO] [stdout]  --> src/ownership.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn clone(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/ownership.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_ownership`
[INFO] [stdout]   --> src/ownership.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn takes_ownership(some_string: String) { // some_string comes into scope
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `makes_copy`
[INFO] [stdout]   --> src/ownership.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn makes_copy(some_integer: i32) { // some_integer comes into scope
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `dangler`
[INFO] [stdout]   --> src/ownership.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn dangler() {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `dangle`
[INFO] [stdout]   --> src/ownership.rs:45:4
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn dangle() -> String {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.45s
[INFO] running `Command { std: "docker" "inspect" "bf995a9258a8ddbfcc752c2154f9d05bb814e4f99121a8b4ccee95ae9c048222", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf995a9258a8ddbfcc752c2154f9d05bb814e4f99121a8b4ccee95ae9c048222", kill_on_drop: false }`
[INFO] [stdout] bf995a9258a8ddbfcc752c2154f9d05bb814e4f99121a8b4ccee95ae9c048222
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ac7939662db56a6ae0c5ccf05c45ec0128f8fb5a7c7b7ffdd020c523864b1294
[INFO] running `Command { std: "docker" "start" "-a" "ac7939662db56a6ae0c5ccf05c45ec0128f8fb5a7c7b7ffdd020c523864b1294", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling learn-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `ref_to_nothing`
[INFO] [stdout]   --> src/ownership.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let ref_to_nothing = dangle();
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ref_to_nothing`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `guessing_game`
[INFO] [stdout]   --> src/main.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn guessing_game() {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `hello`
[INFO] [stdout]  --> src/ownership.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn hello(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `clone`
[INFO] [stdout]  --> src/ownership.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn clone(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `main`
[INFO] [stdout]   --> src/ownership.rs:15:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub fn main() {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_ownership`
[INFO] [stdout]   --> src/ownership.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn takes_ownership(some_string: String) { // some_string comes into scope
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `makes_copy`
[INFO] [stdout]   --> src/ownership.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn makes_copy(some_integer: i32) { // some_integer comes into scope
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `dangler`
[INFO] [stdout]   --> src/ownership.rs:41:8
[INFO] [stdout]    |
[INFO] [stdout] 41 | pub fn dangler() {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `dangle`
[INFO] [stdout]   --> src/ownership.rs:45:4
[INFO] [stdout]    |
[INFO] [stdout] 45 | fn dangle() -> String {
[INFO] [stdout]    |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 4.63s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/learn_rust-a0e4fc7e390325c7)
[INFO] running `Command { std: "docker" "inspect" "ac7939662db56a6ae0c5ccf05c45ec0128f8fb5a7c7b7ffdd020c523864b1294", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac7939662db56a6ae0c5ccf05c45ec0128f8fb5a7c7b7ffdd020c523864b1294", kill_on_drop: false }`
[INFO] [stdout] ac7939662db56a6ae0c5ccf05c45ec0128f8fb5a7c7b7ffdd020c523864b1294
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-16/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 35f832fba05bfa0ed2f4994b5f9d1375aff65da6fc19453a16a2eaeb93929292
[INFO] running `Command { std: "docker" "start" "-a" "35f832fba05bfa0ed2f4994b5f9d1375aff65da6fc19453a16a2eaeb93929292", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused variable: `ref_to_nothing`
[INFO] [stderr]   --> src/ownership.rs:42:9
[INFO] [stderr]    |
[INFO] [stderr] 42 |     let ref_to_nothing = dangle();
[INFO] [stderr]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_ref_to_nothing`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `guessing_game`
[INFO] [stderr]   --> src/main.rs:14:4
[INFO] [stderr]    |
[INFO] [stderr] 14 | fn guessing_game() {
[INFO] [stderr]    |    ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `hello`
[INFO] [stderr]  --> src/ownership.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn hello(){
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `clone`
[INFO] [stderr]  --> src/ownership.rs:8:8
[INFO] [stderr]   |
[INFO] [stderr] 8 | pub fn clone(){
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `main`
[INFO] [stderr]   --> src/ownership.rs:15:8
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub fn main() {
[INFO] [stderr]    |        ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `takes_ownership`
[INFO] [stderr]   --> src/ownership.rs:32:8
[INFO] [stderr]    |
[INFO] [stderr] 32 | pub fn takes_ownership(some_string: String) { // some_string comes into scope
[INFO] [stderr]    |        ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `makes_copy`
[INFO] [stderr]   --> src/ownership.rs:37:8
[INFO] [stderr]    |
[INFO] [stderr] 37 | pub fn makes_copy(some_integer: i32) { // some_integer comes into scope
[INFO] [stderr]    |        ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `dangler`
[INFO] [stderr]   --> src/ownership.rs:41:8
[INFO] [stderr]    |
[INFO] [stderr] 41 | pub fn dangler() {
[INFO] [stderr]    |        ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `dangle`
[INFO] [stderr]   --> src/ownership.rs:45:4
[INFO] [stderr]    |
[INFO] [stderr] 45 | fn dangle() -> String {
[INFO] [stderr]    |    ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `learn-rust` (bin "learn-rust" test) generated 9 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.68s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/learn_rust-a0e4fc7e390325c7)
[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" "35f832fba05bfa0ed2f4994b5f9d1375aff65da6fc19453a16a2eaeb93929292", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "35f832fba05bfa0ed2f4994b5f9d1375aff65da6fc19453a16a2eaeb93929292", kill_on_drop: false }`
[INFO] [stdout] 35f832fba05bfa0ed2f4994b5f9d1375aff65da6fc19453a16a2eaeb93929292