[INFO] cloning repository https://github.com/ggggxiaolong/rust_course_code
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ggggxiaolong/rust_course_code" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fggggxiaolong%2Frust_course_code", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fggggxiaolong%2Frust_course_code'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 902da18329158327934935193c2c0ddd1e89b4bf
[INFO] testing ggggxiaolong/rust_course_code against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fggggxiaolong%2Frust_course_code" "/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/ggggxiaolong/rust_course_code on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ggggxiaolong/rust_course_code
[INFO] finished tweaking git repo https://github.com/ggggxiaolong/rust_course_code
[INFO] tweaked toml for git repo https://github.com/ggggxiaolong/rust_course_code written to /workspace/builds/worker-45/source/Cargo.toml
[INFO] crate git repo https://github.com/ggggxiaolong/rust_course_code already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7e2e06be6c9dbc4ec3e50b13e3b6f1584c11d6bc06cc3e072bf537ca6b7bd340
[INFO] running `Command { std: "docker" "start" "-a" "7e2e06be6c9dbc4ec3e50b13e3b6f1584c11d6bc06cc3e072bf537ca6b7bd340", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7e2e06be6c9dbc4ec3e50b13e3b6f1584c11d6bc06cc3e072bf537ca6b7bd340", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e2e06be6c9dbc4ec3e50b13e3b6f1584c11d6bc06cc3e072bf537ca6b7bd340", kill_on_drop: false }`
[INFO] [stdout] 7e2e06be6c9dbc4ec3e50b13e3b6f1584c11d6bc06cc3e072bf537ca6b7bd340
[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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4f29fd20ef14992b913cc77f6d5736faaa40228b9bc270fd3aaab89cd167be24
[INFO] running `Command { std: "docker" "start" "-a" "4f29fd20ef14992b913cc77f6d5736faaa40228b9bc270fd3aaab89cd167be24", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rust_course_code v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 25.18s
[INFO] running `Command { std: "docker" "inspect" "4f29fd20ef14992b913cc77f6d5736faaa40228b9bc270fd3aaab89cd167be24", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4f29fd20ef14992b913cc77f6d5736faaa40228b9bc270fd3aaab89cd167be24", kill_on_drop: false }`
[INFO] [stdout] 4f29fd20ef14992b913cc77f6d5736faaa40228b9bc270fd3aaab89cd167be24
[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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 05181c234c11c9cf96e6e4d892e0a63e06c3f6032e9e6dad558a4476000efc60
[INFO] running `Command { std: "docker" "start" "-a" "05181c234c11c9cf96e6e4d892e0a63e06c3f6032e9e6dad558a4476000efc60", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_course_code v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> examples/2_0_basic_concept.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let mut c = 30i32;
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "05181c234c11c9cf96e6e4d892e0a63e06c3f6032e9e6dad558a4476000efc60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "05181c234c11c9cf96e6e4d892e0a63e06c3f6032e9e6dad558a4476000efc60", kill_on_drop: false }`
[INFO] [stdout] 05181c234c11c9cf96e6e4d892e0a63e06c3f6032e9e6dad558a4476000efc60
[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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 45417fae4ecb13de2c08802c92eaa0af84fef82d8cdd5169982730b040460241
[INFO] running `Command { std: "docker" "start" "-a" "45417fae4ecb13de2c08802c92eaa0af84fef82d8cdd5169982730b040460241", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> examples/2_0_basic_concept.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let mut c = 30i32;
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_course_code` (example "2_0_basic_concept") generated 1 warning
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.29s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_course_code-c0546cab9afb8ef9)
[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" "45417fae4ecb13de2c08802c92eaa0af84fef82d8cdd5169982730b040460241", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45417fae4ecb13de2c08802c92eaa0af84fef82d8cdd5169982730b040460241", kill_on_drop: false }`
[INFO] [stdout] 45417fae4ecb13de2c08802c92eaa0af84fef82d8cdd5169982730b040460241