[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 1.59.0 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJonathanLorimer%2Flearn-rust" "/workspace/builds/worker-19/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-19/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JonathanLorimer/learn-rust on toolchain 1.59.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.59.0" "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-19/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" "+1.59.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4b4a74d85e74229dc28751161e0f1be2f692955bcf598b95a45671d3c42ddbdb
[INFO] running `Command { std: "docker" "start" "-a" "4b4a74d85e74229dc28751161e0f1be2f692955bcf598b95a45671d3c42ddbdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4b4a74d85e74229dc28751161e0f1be2f692955bcf598b95a45671d3c42ddbdb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4b4a74d85e74229dc28751161e0f1be2f692955bcf598b95a45671d3c42ddbdb", kill_on_drop: false }`
[INFO] [stdout] 4b4a74d85e74229dc28751161e0f1be2f692955bcf598b95a45671d3c42ddbdb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2c28ac2aaf53a6be8842e126040235693a1b40fba4868ac21f7445658de6ad3e
[INFO] running `Command { std: "docker" "start" "-a" "2c28ac2aaf53a6be8842e126040235693a1b40fba4868ac21f7445658de6ad3e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[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: `hello`
[INFO] [stdout]  --> src/ownership.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn hello(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[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: 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] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 35.41s
[INFO] running `Command { std: "docker" "inspect" "2c28ac2aaf53a6be8842e126040235693a1b40fba4868ac21f7445658de6ad3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2c28ac2aaf53a6be8842e126040235693a1b40fba4868ac21f7445658de6ad3e", kill_on_drop: false }`
[INFO] [stdout] 2c28ac2aaf53a6be8842e126040235693a1b40fba4868ac21f7445658de6ad3e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 788b7ff0085af10c49aa9eba7a88e6e9d961a692bc87259a8d87fb84f5611bbc
[INFO] running `Command { std: "docker" "start" "-a" "788b7ff0085af10c49aa9eba7a88e6e9d961a692bc87259a8d87fb84f5611bbc", kill_on_drop: false }`
[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: `hello`
[INFO] [stdout]  --> src/ownership.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn hello(){
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[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: 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] 
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.86s
[INFO] running `Command { std: "docker" "inspect" "788b7ff0085af10c49aa9eba7a88e6e9d961a692bc87259a8d87fb84f5611bbc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "788b7ff0085af10c49aa9eba7a88e6e9d961a692bc87259a8d87fb84f5611bbc", kill_on_drop: false }`
[INFO] [stdout] 788b7ff0085af10c49aa9eba7a88e6e9d961a692bc87259a8d87fb84f5611bbc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-19/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+1.59.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] f27b47acec2e8f2905bbb51603c0677979afdc0e66e2cee101c9c6d275e9f19d
[INFO] running `Command { std: "docker" "start" "-a" "f27b47acec2e8f2905bbb51603c0677979afdc0e66e2cee101c9c6d275e9f19d", 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: `hello`
[INFO] [stderr]  --> src/ownership.rs:1:8
[INFO] [stderr]   |
[INFO] [stderr] 1 | pub fn hello(){
[INFO] [stderr]   |        ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[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: 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] warning: `learn-rust` (bin "learn-rust" test) generated 9 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.62s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/learn_rust-8fb0daabd7a4059c)
[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" "f27b47acec2e8f2905bbb51603c0677979afdc0e66e2cee101c9c6d275e9f19d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f27b47acec2e8f2905bbb51603c0677979afdc0e66e2cee101c9c6d275e9f19d", kill_on_drop: false }`
[INFO] [stdout] f27b47acec2e8f2905bbb51603c0677979afdc0e66e2cee101c9c6d275e9f19d