[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] checking ggggxiaolong/rust_course_code against master#8317fef20409adedaa7c385fa6e954867bf626fc for pr-154149-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fggggxiaolong%2Frust_course_code" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[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-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/ggggxiaolong/rust_course_code on toolchain 8317fef20409adedaa7c385fa6e954867bf626fc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8317fef20409adedaa7c385fa6e954867bf626fc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/ggggxiaolong/rust_course_code already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8317fef20409adedaa7c385fa6e954867bf626fc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+8317fef20409adedaa7c385fa6e954867bf626fc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b6343ccfda407ccb4623b8c1eccb619db15868c5cba3c82c827102340004d3da
[INFO] running `Command { std: "docker" "start" "-a" "b6343ccfda407ccb4623b8c1eccb619db15868c5cba3c82c827102340004d3da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b6343ccfda407ccb4623b8c1eccb619db15868c5cba3c82c827102340004d3da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b6343ccfda407ccb4623b8c1eccb619db15868c5cba3c82c827102340004d3da", kill_on_drop: false }`
[INFO] [stdout] b6343ccfda407ccb4623b8c1eccb619db15868c5cba3c82c827102340004d3da
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+8317fef20409adedaa7c385fa6e954867bf626fc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3f7ba1e2a30a946180c692fa16305297a4396e7780d3b5aefa6f85ab5e0282c0
[INFO] running `Command { std: "docker" "start" "-a" "3f7ba1e2a30a946180c692fa16305297a4396e7780d3b5aefa6f85ab5e0282c0", kill_on_drop: false }`
[INFO] [stderr]     Checking 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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `Command { std: "docker" "inspect" "3f7ba1e2a30a946180c692fa16305297a4396e7780d3b5aefa6f85ab5e0282c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3f7ba1e2a30a946180c692fa16305297a4396e7780d3b5aefa6f85ab5e0282c0", kill_on_drop: false }`
[INFO] [stdout] 3f7ba1e2a30a946180c692fa16305297a4396e7780d3b5aefa6f85ab5e0282c0