[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 try#d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2 for pr-86479
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fleokang28%2Frust_crash_course" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/leokang28/rust_crash_course on toolchain d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "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-12/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" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded async-mutex v1.4.0
[INFO] [stderr]   Downloaded glib v0.9.3
[INFO] [stderr]   Downloaded gio v0.8.1
[INFO] [stderr]   Downloaded pango v0.8.0
[INFO] [stderr]   Downloaded gdk-sys v0.9.1
[INFO] [stderr]   Downloaded gtk-sys v0.9.2
[INFO] [stderr]   Downloaded async-channel v1.5.1
[INFO] [stderr]   Downloaded crossbeam-utils v0.8.0
[INFO] [stderr]   Downloaded pancurses v0.16.1
[INFO] [stderr]   Downloaded atk v0.8.0
[INFO] [stderr]   Downloaded gio-sys v0.9.1
[INFO] [stderr]   Downloaded atk-sys v0.9.1
[INFO] [stderr]   Downloaded cairo-rs v0.8.1
[INFO] [stderr]   Downloaded pango-sys v0.9.1
[INFO] [stderr]   Downloaded gdk v0.12.1
[INFO] [stderr]   Downloaded ncurses v5.99.0
[INFO] [stderr]   Downloaded gtk v0.8.1
[INFO] [stderr]   Downloaded async-std v1.7.0
[INFO] [stderr]   Downloaded pdcurses-sys v0.7.1
[INFO] [stderr]   Downloaded async-io v1.2.0
[INFO] [stderr]   Downloaded gdk-pixbuf v0.8.0
[INFO] [stderr]   Downloaded async-attributes v1.1.1
[INFO] [stderr]   Downloaded polling v2.0.2
[INFO] [stderr]   Downloaded cairo-sys-rs v0.9.2
[INFO] [stderr]   Downloaded gdk-pixbuf-sys v0.9.1
[INFO] [stderr]   Downloaded glib-sys v0.9.1
[INFO] [stderr]   Downloaded gobject-sys v0.9.1
[INFO] [stderr]   Downloaded async-global-executor v1.4.3
[INFO] [stderr]   Downloaded nb-connect v1.0.2
[INFO] [stderr]   Downloaded futures-lite v1.11.2
[INFO] [stderr]   Downloaded blocking v1.0.2
[INFO] [stderr]   Downloaded wepoll-sys v3.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f4fb574ef38d65667ef8597e1a6ea764d559a1b17f69ebe6cd6c4137d480c338
[INFO] running `Command { std: "docker" "start" "-a" "f4fb574ef38d65667ef8597e1a6ea764d559a1b17f69ebe6cd6c4137d480c338", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f4fb574ef38d65667ef8597e1a6ea764d559a1b17f69ebe6cd6c4137d480c338", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4fb574ef38d65667ef8597e1a6ea764d559a1b17f69ebe6cd6c4137d480c338", kill_on_drop: false }`
[INFO] [stdout] f4fb574ef38d65667ef8597e1a6ea764d559a1b17f69ebe6cd6c4137d480c338
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 712774cb67612196ca6639c5df13bf0521a2af6bffef39709ba3cc7ab781c187
[INFO] running `Command { std: "docker" "start" "-a" "712774cb67612196ca6639c5df13bf0521a2af6bffef39709ba3cc7ab781c187", 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 0.32s
[INFO] running `Command { std: "docker" "inspect" "712774cb67612196ca6639c5df13bf0521a2af6bffef39709ba3cc7ab781c187", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "712774cb67612196ca6639c5df13bf0521a2af6bffef39709ba3cc7ab781c187", kill_on_drop: false }`
[INFO] [stdout] 712774cb67612196ca6639c5df13bf0521a2af6bffef39709ba3cc7ab781c187
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 039459ec00c8c24f694db39f4516e101ba33287fc31f533f9d6b0c0548a352c9
[INFO] running `Command { std: "docker" "start" "-a" "039459ec00c8c24f694db39f4516e101ba33287fc31f533f9d6b0c0548a352c9", 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 0.49s
[INFO] running `Command { std: "docker" "inspect" "039459ec00c8c24f694db39f4516e101ba33287fc31f533f9d6b0c0548a352c9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "039459ec00c8c24f694db39f4516e101ba33287fc31f533f9d6b0c0548a352c9", kill_on_drop: false }`
[INFO] [stdout] 039459ec00c8c24f694db39f4516e101ba33287fc31f533f9d6b0c0548a352c9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a59e85976443ba621b740670d19bbf005c8b5af0b3eb69e8a4644437d3181d44
[INFO] running `Command { std: "docker" "start" "-a" "a59e85976443ba621b740670d19bbf005c8b5af0b3eb69e8a4644437d3181d44", 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: `rust_crash_course` (example "borrow") generated 1 warning
[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` (bin "rust_crash_course" test) generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_crash_course-f15a945d0cd591ea)
[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" "a59e85976443ba621b740670d19bbf005c8b5af0b3eb69e8a4644437d3181d44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a59e85976443ba621b740670d19bbf005c8b5af0b3eb69e8a4644437d3181d44", kill_on_drop: false }`
[INFO] [stdout] a59e85976443ba621b740670d19bbf005c8b5af0b3eb69e8a4644437d3181d44