[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#8262275854dc0e5381c9d42d56257d94932c5a87 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-88/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-88/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/leokang28/rust_crash_course on toolchain 8262275854dc0e5381c9d42d56257d94932c5a87
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "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-88/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" "+8262275854dc0e5381c9d42d56257d94932c5a87" "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 pango v0.8.0
[INFO] [stderr]   Downloaded gdk-pixbuf v0.8.0
[INFO] [stderr]   Downloaded async-io v1.2.0
[INFO] [stderr]   Downloaded cairo-rs v0.8.1
[INFO] [stderr]   Downloaded pancurses v0.16.1
[INFO] [stderr]   Downloaded gobject-sys v0.9.1
[INFO] [stderr]   Downloaded gdk v0.12.1
[INFO] [stderr]   Downloaded atk v0.8.0
[INFO] [stderr]   Downloaded glib v0.9.3
[INFO] [stderr]   Downloaded glib-sys v0.9.1
[INFO] [stderr]   Downloaded gdk-pixbuf-sys v0.9.1
[INFO] [stderr]   Downloaded cairo-sys-rs v0.9.2
[INFO] [stderr]   Downloaded gio v0.8.1
[INFO] [stderr]   Downloaded gio-sys v0.9.1
[INFO] [stderr]   Downloaded gdk-sys v0.9.1
[INFO] [stderr]   Downloaded pdcurses-sys v0.7.1
[INFO] [stderr]   Downloaded async-std v1.7.0
[INFO] [stderr]   Downloaded gtk v0.8.1
[INFO] [stderr]   Downloaded async-global-executor v1.4.3
[INFO] [stderr]   Downloaded pango-sys v0.9.1
[INFO] [stderr]   Downloaded nb-connect v1.0.2
[INFO] [stderr]   Downloaded polling v2.0.2
[INFO] [stderr]   Downloaded atk-sys v0.9.1
[INFO] [stderr]   Downloaded gtk-sys v0.9.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/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" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dbc342938eee1d0f5e69ffabf6fbbcbf0a6f01292d6fe9c7e6d16df1f2132b76
[INFO] running `Command { std: "docker" "start" "-a" "dbc342938eee1d0f5e69ffabf6fbbcbf0a6f01292d6fe9c7e6d16df1f2132b76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dbc342938eee1d0f5e69ffabf6fbbcbf0a6f01292d6fe9c7e6d16df1f2132b76", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dbc342938eee1d0f5e69ffabf6fbbcbf0a6f01292d6fe9c7e6d16df1f2132b76", kill_on_drop: false }`
[INFO] [stdout] dbc342938eee1d0f5e69ffabf6fbbcbf0a6f01292d6fe9c7e6d16df1f2132b76
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/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" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dd63f94865a1c5185904efd89d730a53a7b0d049ceb19048bd04d5d87b0d5518
[INFO] running `Command { std: "docker" "start" "-a" "dd63f94865a1c5185904efd89d730a53a7b0d049ceb19048bd04d5d87b0d5518", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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 2.17s
[INFO] running `Command { std: "docker" "inspect" "dd63f94865a1c5185904efd89d730a53a7b0d049ceb19048bd04d5d87b0d5518", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd63f94865a1c5185904efd89d730a53a7b0d049ceb19048bd04d5d87b0d5518", kill_on_drop: false }`
[INFO] [stdout] dd63f94865a1c5185904efd89d730a53a7b0d049ceb19048bd04d5d87b0d5518
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/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" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c85d30be3745f707a62791a7d84dc36f6b9d10878c80dbe06734cf8e09c02de9
[INFO] running `Command { std: "docker" "start" "-a" "c85d30be3745f707a62791a7d84dc36f6b9d10878c80dbe06734cf8e09c02de9", 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 0.48s
[INFO] running `Command { std: "docker" "inspect" "c85d30be3745f707a62791a7d84dc36f6b9d10878c80dbe06734cf8e09c02de9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c85d30be3745f707a62791a7d84dc36f6b9d10878c80dbe06734cf8e09c02de9", kill_on_drop: false }`
[INFO] [stdout] c85d30be3745f707a62791a7d84dc36f6b9d10878c80dbe06734cf8e09c02de9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-88/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" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 3086536349a8eb8b98dea4201e75f61d6b7a145d91c314acebdafbe43a9dad8d
[INFO] running `Command { std: "docker" "start" "-a" "3086536349a8eb8b98dea4201e75f61d6b7a145d91c314acebdafbe43a9dad8d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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: 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` (bin "rust_crash_course" test) generated 1 warning
[INFO] [stderr] warning: `rust_crash_course` (example "borrow") generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 4.44s
[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" "3086536349a8eb8b98dea4201e75f61d6b7a145d91c314acebdafbe43a9dad8d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3086536349a8eb8b98dea4201e75f61d6b7a145d91c314acebdafbe43a9dad8d", kill_on_drop: false }`
[INFO] [stdout] 3086536349a8eb8b98dea4201e75f61d6b7a145d91c314acebdafbe43a9dad8d