[INFO] cloning repository https://github.com/leokang28/rust_crash_course
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/leokang28/rust_crash_course" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleokang28%2Frust_crash_course", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleokang28%2Frust_crash_course'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 839a09465ba49ca150a3c8b4fbbbc3768fa1d14c
[INFO] testing leokang28/rust_crash_course against master#62efba8a050c64249dab942951bb28f710208bc8 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleokang28%2Frust_crash_course" "/workspace/builds/worker-45/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-45/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/leokang28/rust_crash_course 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/leokang28/rust_crash_course
[INFO] finished tweaking git repo https://github.com/leokang28/rust_crash_course
[INFO] tweaked toml for git repo https://github.com/leokang28/rust_crash_course written to /workspace/builds/worker-45/source/Cargo.toml
[INFO] crate git repo https://github.com/leokang28/rust_crash_course 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] [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-45/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/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] 1f0f41585df09a8a11894d1f29e1c9438dc2b6a06ff31c52bbe3a4f2fecf775e
[INFO] running `Command { std: "docker" "start" "-a" "1f0f41585df09a8a11894d1f29e1c9438dc2b6a06ff31c52bbe3a4f2fecf775e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1f0f41585df09a8a11894d1f29e1c9438dc2b6a06ff31c52bbe3a4f2fecf775e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1f0f41585df09a8a11894d1f29e1c9438dc2b6a06ff31c52bbe3a4f2fecf775e", kill_on_drop: false }`
[INFO] [stdout] 1f0f41585df09a8a11894d1f29e1c9438dc2b6a06ff31c52bbe3a4f2fecf775e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/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] 82d1bb4a4612ae0fca1426f48c7d47cd2806bd8128c5daf2df14790afd14d293
[INFO] running `Command { std: "docker" "start" "-a" "82d1bb4a4612ae0fca1426f48c7d47cd2806bd8128c5daf2df14790afd14d293", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_crash_course v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `chars`
[INFO] [stdout]   --> src/byteliteral.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |         let chars = arg.chars();
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_chars`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.56s
[INFO] running `Command { std: "docker" "inspect" "82d1bb4a4612ae0fca1426f48c7d47cd2806bd8128c5daf2df14790afd14d293", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82d1bb4a4612ae0fca1426f48c7d47cd2806bd8128c5daf2df14790afd14d293", kill_on_drop: false }`
[INFO] [stdout] 82d1bb4a4612ae0fca1426f48c7d47cd2806bd8128c5daf2df14790afd14d293
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/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] fdac2fda24ec1b81b289a0ada8390afc8c05d91cecce15bdb707c402773bb86e
[INFO] running `Command { std: "docker" "start" "-a" "fdac2fda24ec1b81b289a0ada8390afc8c05d91cecce15bdb707c402773bb86e", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_crash_course v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `chars`
[INFO] [stdout]   --> src/byteliteral.rs:12:13
[INFO] [stdout]    |
[INFO] [stdout] 12 |         let chars = arg.chars();
[INFO] [stdout]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_chars`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `use_vale`
[INFO] [stdout]   --> examples/borrow.rs:16:4
[INFO] [stdout]    |
[INFO] [stdout] 16 | fn use_vale(v: &Foo) {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.47s
[INFO] running `Command { std: "docker" "inspect" "fdac2fda24ec1b81b289a0ada8390afc8c05d91cecce15bdb707c402773bb86e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fdac2fda24ec1b81b289a0ada8390afc8c05d91cecce15bdb707c402773bb86e", kill_on_drop: false }`
[INFO] [stdout] fdac2fda24ec1b81b289a0ada8390afc8c05d91cecce15bdb707c402773bb86e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-45/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] 6139a83a10b7b4c0213abda2128e6e0243aa2edf94743833d98e90746311ad03
[INFO] running `Command { std: "docker" "start" "-a" "6139a83a10b7b4c0213abda2128e6e0243aa2edf94743833d98e90746311ad03", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: function is never used: `use_vale`
[INFO] [stderr]   --> examples/borrow.rs:16:4
[INFO] [stderr]    |
[INFO] [stderr] 16 | fn use_vale(v: &Foo) {
[INFO] [stderr]    |    ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `chars`
[INFO] [stderr]   --> src/byteliteral.rs:12:13
[INFO] [stderr]    |
[INFO] [stderr] 12 |         let chars = arg.chars();
[INFO] [stderr]    |             ^^^^^ help: if this is intentional, prefix it with an underscore: `_chars`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_crash_course` (example "borrow") generated 1 warning
[INFO] [stderr] warning: `rust_crash_course` (bin "rust_crash_course" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 4.48s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_crash_course-3ddeba9f6a4051a4)
[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" "6139a83a10b7b4c0213abda2128e6e0243aa2edf94743833d98e90746311ad03", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6139a83a10b7b4c0213abda2128e6e0243aa2edf94743833d98e90746311ad03", kill_on_drop: false }`
[INFO] [stdout] 6139a83a10b7b4c0213abda2128e6e0243aa2edf94743833d98e90746311ad03