[INFO] cloning repository https://github.com/python2019-08/rust01
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/python2019-08/rust01" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpython2019-08%2Frust01", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpython2019-08%2Frust01'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 14e60fd349920c7baf7bf3ecfd2388ec659c2c79
[INFO] checking python2019-08/rust01 against try#5f6abd89da253a562ad85d235b9342a3ac336c28 for pr-156114-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpython2019-08%2Frust01" "/workspace/builds/worker-3-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/python2019-08/rust01
[INFO] finished tweaking git repo https://github.com/python2019-08/rust01
[INFO] tweaked toml for git repo https://github.com/python2019-08/rust01 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/python2019-08/rust01 on toolchain 5f6abd89da253a562ad85d235b9342a3ac336c28
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+5f6abd89da253a562ad85d235b9342a3ac336c28" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/python2019-08/rust01 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" "+5f6abd89da253a562ad85d235b9342a3ac336c28" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "+5f6abd89da253a562ad85d235b9342a3ac336c28" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d54078bcec094973e25ce1d4070628eaff19156b7090bb08ba5a8f8e336ebe3e
[INFO] running `Command { std: "docker" "start" "-a" "d54078bcec094973e25ce1d4070628eaff19156b7090bb08ba5a8f8e336ebe3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d54078bcec094973e25ce1d4070628eaff19156b7090bb08ba5a8f8e336ebe3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d54078bcec094973e25ce1d4070628eaff19156b7090bb08ba5a8f8e336ebe3e", kill_on_drop: false }`
[INFO] [stdout] d54078bcec094973e25ce1d4070628eaff19156b7090bb08ba5a8f8e336ebe3e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "+5f6abd89da253a562ad85d235b9342a3ac336c28" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8451a7f37f36caf8c998b6c12b80fac74534329e7d70810d4ccb0bd80318d8f5
[INFO] running `Command { std: "docker" "start" "-a" "8451a7f37f36caf8c998b6c12b80fac74534329e7d70810d4ccb0bd80318d8f5", kill_on_drop: false }`
[INFO] [stderr]     Checking rust01 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/test01/test_closure.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut num = String::from("123456");
[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] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/test01/test_ref_ownship.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let mut s1 = String::from("hello");  // s1 拥有这个字符串
[INFO] [stdout]    |         ----^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/test01/test_closure.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let mut num = String::from("123456");
[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] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> src/test01/test_ref_ownship.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let mut s1 = String::from("hello");  // s1 拥有这个字符串
[INFO] [stdout]    |         ----^^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.27s
[INFO] running `Command { std: "docker" "inspect" "8451a7f37f36caf8c998b6c12b80fac74534329e7d70810d4ccb0bd80318d8f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8451a7f37f36caf8c998b6c12b80fac74534329e7d70810d4ccb0bd80318d8f5", kill_on_drop: false }`
[INFO] [stdout] 8451a7f37f36caf8c998b6c12b80fac74534329e7d70810d4ccb0bd80318d8f5
