[INFO] cloning repository https://github.com/weiyinfu/learnRust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/weiyinfu/learnRust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fweiyinfu%2FlearnRust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fweiyinfu%2FlearnRust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e8ae9912ed3b3c3b6cee70eec8b73c7dad18becc
[INFO] testing weiyinfu/learnRust against 1.54.0 for beta-1.55-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fweiyinfu%2FlearnRust" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/weiyinfu/learnRust on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/weiyinfu/learnRust
[INFO] finished tweaking git repo https://github.com/weiyinfu/learnRust
[INFO] tweaked toml for git repo https://github.com/weiyinfu/learnRust written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/weiyinfu/learnRust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 2468de6c5f299b06cd2d5190f4a318b1597d96f0ec88ea8c55149cb5b8f5e95c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2468de6c5f299b06cd2d5190f4a318b1597d96f0ec88ea8c55149cb5b8f5e95c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "2468de6c5f299b06cd2d5190f4a318b1597d96f0ec88ea8c55149cb5b8f5e95c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2468de6c5f299b06cd2d5190f4a318b1597d96f0ec88ea8c55149cb5b8f5e95c", kill_on_drop: false }`
[INFO] [stdout] 2468de6c5f299b06cd2d5190f4a318b1597d96f0ec88ea8c55149cb5b8f5e95c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8eb2ff9c61681f68d83d501614b71b712a8ca3cf588c25581d67c2e06deba908
[INFO] running `Command { std: "docker" "start" "-a" "8eb2ff9c61681f68d83d501614b71b712a8ca3cf588c25581d67c2e06deba908", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.12
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]    Compiling futures-task v0.3.4
[INFO] [stderr]    Compiling net2 v0.2.34
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling backtrace-sys v0.1.35
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling chrono v0.4.11
[INFO] [stderr]    Compiling backtrace v0.3.46
[INFO] [stderr]    Compiling futures-util v0.3.4
[INFO] [stderr]    Compiling mio v0.6.22
[INFO] [stderr]    Compiling error-chain v0.10.0
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling tokio v0.2.20
[INFO] [stderr]    Compiling quote v1.0.4
[INFO] [stderr]    Compiling syn v1.0.18
[INFO] [stderr]    Compiling ferris-says v0.1.2
[INFO] [stderr]    Compiling tokio-util v0.3.1
[INFO] [stderr]    Compiling h2 v0.2.4
[INFO] [stderr]    Compiling serde_json v1.0.52
[INFO] [stderr]    Compiling pin-project-internal v0.4.9
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]    Compiling pin-project v0.4.9
[INFO] [stderr]    Compiling hyper v0.13.5
[INFO] [stderr]    Compiling learnRust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function is never used: `b`
[INFO] [stdout]   --> src/cnTest.rs:32:4
[INFO] [stdout]    |
[INFO] [stdout] 32 | fn b() {}
[INFO] [stdout]    |    ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `haha`
[INFO] [stdout]  --> src/useFolder/one.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn haha() {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `haha`
[INFO] [stdout]  --> src/useFolder/mod.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn haha() {
[INFO] [stdout]   |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0594]: cannot assign to `a[_][_]`, as `Fn` closures cannot mutate their captured variables
[INFO] [stdout]   --> src/bin/13-闭包递归八皇后.rs:56:17
[INFO] [stdout]    |
[INFO] [stdout] 56 |                 a[x][y] = 1;
[INFO] [stdout]    |                 ^^^^^^^^^^^ cannot assign
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0594]: cannot assign to `a[_][_]`, as `Fn` closures cannot mutate their captured variables
[INFO] [stdout]   --> src/bin/13-闭包递归八皇后.rs:58:17
[INFO] [stdout]    |
[INFO] [stdout] 58 |                 a[x][y] = 0;
[INFO] [stdout]    |                 ^^^^^^^^^^^ cannot assign
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0502]: cannot borrow `a` as mutable because it is also borrowed as immutable
[INFO] [stdout]   --> src/bin/13-闭包递归八皇后.rs:46:14
[INFO] [stdout]    |
[INFO] [stdout] 12 |     let canput = |x: &usize, y: &usize| {
[INFO] [stdout]    |                  ---------------------- immutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 21 |                         if a[xx as usize][yy as usize] != 0 {
[INFO] [stdout]    |                            - first borrow occurs due to use of `a` in closure
[INFO] [stdout] ...
[INFO] [stdout] 46 |         go: &|g, x, y| {
[INFO] [stdout]    |              ^^^^^^^^^ mutable borrow occurs here
[INFO] [stdout] ...
[INFO] [stdout] 55 |             if canput(&x, &y) {
[INFO] [stdout]    |                ------ immutable borrow later captured here by closure
[INFO] [stdout] 56 |                 a[x][y] = 1;
[INFO] [stdout]    |                 - second borrow occurs due to use of `a` in closure
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0502, E0594.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0502`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `learnRust`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: unused import: `std::ops::DerefMut`
[INFO] [stdout]  --> src/bin/03-链表小练习-实现move_next.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::ops::DerefMut;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "8eb2ff9c61681f68d83d501614b71b712a8ca3cf588c25581d67c2e06deba908", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8eb2ff9c61681f68d83d501614b71b712a8ca3cf588c25581d67c2e06deba908", kill_on_drop: false }`
[INFO] [stdout] 8eb2ff9c61681f68d83d501614b71b712a8ca3cf588c25581d67c2e06deba908
