[INFO] cloning repository https://github.com/JoanneGeng/firstrust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/JoanneGeng/firstrust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoanneGeng%2Ffirstrust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoanneGeng%2Ffirstrust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 124658cde20d7083024d5870a2ca535f5770021f
[INFO] checking JoanneGeng/firstrust against master#cfbc6d4cf1acbac5c025acf8ed68929caa551df3 for pr-75494-beta
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoanneGeng%2Ffirstrust" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JoanneGeng/firstrust on toolchain cfbc6d4cf1acbac5c025acf8ed68929caa551df3
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cfbc6d4cf1acbac5c025acf8ed68929caa551df3" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/JoanneGeng/firstrust
[INFO] finished tweaking git repo https://github.com/JoanneGeng/firstrust
[INFO] tweaked toml for git repo https://github.com/JoanneGeng/firstrust written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/JoanneGeng/firstrust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cfbc6d4cf1acbac5c025acf8ed68929caa551df3" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+cfbc6d4cf1acbac5c025acf8ed68929caa551df3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 50152ab212fdcde4a8e7700352e4ccf9e181f84a2d6bbaa2b4f3b01460bf4b14
[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" "50152ab212fdcde4a8e7700352e4ccf9e181f84a2d6bbaa2b4f3b01460bf4b14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "50152ab212fdcde4a8e7700352e4ccf9e181f84a2d6bbaa2b4f3b01460bf4b14", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "50152ab212fdcde4a8e7700352e4ccf9e181f84a2d6bbaa2b4f3b01460bf4b14", kill_on_drop: false }`
[INFO] [stdout] 50152ab212fdcde4a8e7700352e4ccf9e181f84a2d6bbaa2b4f3b01460bf4b14
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+cfbc6d4cf1acbac5c025acf8ed68929caa551df3" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3c63a2205d81897ec20682c56bbe661f3304f8bec38302216997c6a33f132c0a
[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" "3c63a2205d81897ec20682c56bbe661f3304f8bec38302216997c6a33f132c0a", kill_on_drop: false }`
[INFO] [stderr]     Checking firstrust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `ownership_and_copy_main`
[INFO] [stdout]  --> src/ownership.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub(crate) fn ownership_and_copy_main() {
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_ownership`
[INFO] [stdout]   --> src/ownership.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | 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:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn makes_copy(some_integer: i32) { // some_integer comes into scope.
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `return_and_scope_main`
[INFO] [stdout]   --> src/ownership.rs:38:15
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub(crate) fn return_and_scope_main() {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `gives_ownership`
[INFO] [stdout]   --> src/ownership.rs:54:4
[INFO] [stdout]    |
[INFO] [stdout] 54 | fn gives_ownership() -> String {             // gives_ownership will move its
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_and_gives_back`
[INFO] [stdout]   --> src/ownership.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn takes_and_gives_back(a_string: String) -> String { // a_string comes into
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `tuple_main`
[INFO] [stdout]   --> src/ownership.rs:75:15
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub(crate) fn tuple_main() {
[INFO] [stdout]    |               ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `calculate_length`
[INFO] [stdout]   --> src/ownership.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn calculate_length(s: String) -> (String, usize) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `ownership_and_copy_main`
[INFO] [stdout]  --> src/ownership.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub(crate) fn ownership_and_copy_main() {
[INFO] [stdout]   |               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_ownership`
[INFO] [stdout]   --> src/ownership.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | 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:30:4
[INFO] [stdout]    |
[INFO] [stdout] 30 | fn makes_copy(some_integer: i32) { // some_integer comes into scope.
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `return_and_scope_main`
[INFO] [stdout]   --> src/ownership.rs:38:15
[INFO] [stdout]    |
[INFO] [stdout] 38 | pub(crate) fn return_and_scope_main() {
[INFO] [stdout]    |               ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `gives_ownership`
[INFO] [stdout]   --> src/ownership.rs:54:4
[INFO] [stdout]    |
[INFO] [stdout] 54 | fn gives_ownership() -> String {             // gives_ownership will move its
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `takes_and_gives_back`
[INFO] [stdout]   --> src/ownership.rs:66:4
[INFO] [stdout]    |
[INFO] [stdout] 66 | fn takes_and_gives_back(a_string: String) -> String { // a_string comes into
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `tuple_main`
[INFO] [stdout]   --> src/ownership.rs:75:15
[INFO] [stdout]    |
[INFO] [stdout] 75 | pub(crate) fn tuple_main() {
[INFO] [stdout]    |               ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `calculate_length`
[INFO] [stdout]   --> src/ownership.rs:83:4
[INFO] [stdout]    |
[INFO] [stdout] 83 | fn calculate_length(s: String) -> (String, usize) {
[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 0.54s
[INFO] running `Command { std: "docker" "inspect" "3c63a2205d81897ec20682c56bbe661f3304f8bec38302216997c6a33f132c0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c63a2205d81897ec20682c56bbe661f3304f8bec38302216997c6a33f132c0a", kill_on_drop: false }`
[INFO] [stdout] 3c63a2205d81897ec20682c56bbe661f3304f8bec38302216997c6a33f132c0a
