[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] testing JoanneGeng/firstrust against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FJoanneGeng%2Ffirstrust" "/workspace/builds/worker-98/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-98/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/JoanneGeng/firstrust on toolchain 62efba8a050c64249dab942951bb28f710208bc8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", 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-98/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" "+62efba8a050c64249dab942951bb28f710208bc8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 04c4d2f67be250421c541f5e4170a19fb6d2636b4fcc7cc7c6350b51509a6657
[INFO] running `Command { std: "docker" "start" "-a" "04c4d2f67be250421c541f5e4170a19fb6d2636b4fcc7cc7c6350b51509a6657", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "04c4d2f67be250421c541f5e4170a19fb6d2636b4fcc7cc7c6350b51509a6657", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04c4d2f67be250421c541f5e4170a19fb6d2636b4fcc7cc7c6350b51509a6657", kill_on_drop: false }`
[INFO] [stdout] 04c4d2f67be250421c541f5e4170a19fb6d2636b4fcc7cc7c6350b51509a6657
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 42b954d222ece74974ce7b16f1e3cfe1765aca9f3ed1e360393ebb04f06b48ae
[INFO] running `Command { std: "docker" "start" "-a" "42b954d222ece74974ce7b16f1e3cfe1765aca9f3ed1e360393ebb04f06b48ae", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling 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] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 24.32s
[INFO] running `Command { std: "docker" "inspect" "42b954d222ece74974ce7b16f1e3cfe1765aca9f3ed1e360393ebb04f06b48ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42b954d222ece74974ce7b16f1e3cfe1765aca9f3ed1e360393ebb04f06b48ae", kill_on_drop: false }`
[INFO] [stdout] 42b954d222ece74974ce7b16f1e3cfe1765aca9f3ed1e360393ebb04f06b48ae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] faf067ad6569c5753ccb3740883a2dfd5795b547531e973e4f25f51044d35a91
[INFO] running `Command { std: "docker" "start" "-a" "faf067ad6569c5753ccb3740883a2dfd5795b547531e973e4f25f51044d35a91", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "faf067ad6569c5753ccb3740883a2dfd5795b547531e973e4f25f51044d35a91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "faf067ad6569c5753ccb3740883a2dfd5795b547531e973e4f25f51044d35a91", kill_on_drop: false }`
[INFO] [stdout] faf067ad6569c5753ccb3740883a2dfd5795b547531e973e4f25f51044d35a91
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-98/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+62efba8a050c64249dab942951bb28f710208bc8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 42b5319d9795f39b4efe841381524e4477925a3cf3e0d6c211669fcb4f0f3536
[INFO] running `Command { std: "docker" "start" "-a" "42b5319d9795f39b4efe841381524e4477925a3cf3e0d6c211669fcb4f0f3536", kill_on_drop: false }`
[INFO] [stderr] warning: function is never used: `ownership_and_copy_main`
[INFO] [stderr]  --> src/ownership.rs:4:15
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub(crate) fn ownership_and_copy_main() {
[INFO] [stderr]   |               ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `takes_ownership`
[INFO] [stderr]   --> src/ownership.rs:25:4
[INFO] [stderr]    |
[INFO] [stderr] 25 | 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:30:4
[INFO] [stderr]    |
[INFO] [stderr] 30 | fn makes_copy(some_integer: i32) { // some_integer comes into scope.
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `return_and_scope_main`
[INFO] [stderr]   --> src/ownership.rs:38:15
[INFO] [stderr]    |
[INFO] [stderr] 38 | pub(crate) fn return_and_scope_main() {
[INFO] [stderr]    |               ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gives_ownership`
[INFO] [stderr]   --> src/ownership.rs:54:4
[INFO] [stderr]    |
[INFO] [stderr] 54 | fn gives_ownership() -> String {             // gives_ownership will move its
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `takes_and_gives_back`
[INFO] [stderr]   --> src/ownership.rs:66:4
[INFO] [stderr]    |
[INFO] [stderr] 66 | fn takes_and_gives_back(a_string: String) -> String { // a_string comes into
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tuple_main`
[INFO] [stderr]   --> src/ownership.rs:75:15
[INFO] [stderr]    |
[INFO] [stderr] 75 | pub(crate) fn tuple_main() {
[INFO] [stderr]    |               ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `calculate_length`
[INFO] [stderr]   --> src/ownership.rs:83:4
[INFO] [stderr]    |
[INFO] [stderr] 83 | fn calculate_length(s: String) -> (String, usize) {
[INFO] [stderr]    |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `firstrust` (bin "firstrust" test) generated 8 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/firstrust-0b3378f70c5d26a9)
[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" "42b5319d9795f39b4efe841381524e4477925a3cf3e0d6c211669fcb4f0f3536", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42b5319d9795f39b4efe841381524e4477925a3cf3e0d6c211669fcb4f0f3536", kill_on_drop: false }`
[INFO] [stdout] 42b5319d9795f39b4efe841381524e4477925a3cf3e0d6c211669fcb4f0f3536