[INFO] cloning repository https://github.com/IThawk/rust-learn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/IThawk/rust-learn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIThawk%2Frust-learn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIThawk%2Frust-learn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6830f51f9b32aa373ffdc9a12bcb2df1b8503eb3
[INFO] testing IThawk/rust-learn against beta-2022-02-22 for beta-1.60-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIThawk%2Frust-learn" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/IThawk/rust-learn on toolchain beta-2022-02-22
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/IThawk/rust-learn
[INFO] finished tweaking git repo https://github.com/IThawk/rust-learn
[INFO] tweaked toml for git repo https://github.com/IThawk/rust-learn written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate git repo https://github.com/IThawk/rust-learn already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-02-22" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded const_fn v0.4.9
[INFO] [stderr]   Downloaded clap_derive v3.0.6
[INFO] [stderr]   Downloaded perlin2d v0.2.6
[INFO] [stderr]   Downloaded h2 v0.3.10
[INFO] [stderr]   Downloaded heck v0.4.0
[INFO] [stderr]   Downloaded jsonxf v1.1.1
[INFO] [stderr]   Downloaded palette v0.5.0
[INFO] [stderr]   Downloaded async-compression v0.3.8
[INFO] [stderr]   Downloaded photon-rs v0.3.1
[INFO] [stderr]   Downloaded node-sys v0.4.2
[INFO] [stderr]   Downloaded clap v3.0.7
[INFO] [stderr]   Downloaded axum v0.2.8
[INFO] [stderr]   Downloaded palette_derive v0.5.0
[INFO] [stderr]   Downloaded tower-http v0.1.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 1e4ee28560782de23e39433d537c0c0d66a5765fcb2f2765b9c90c3ec9187622
[INFO] running `Command { std: "docker" "start" "-a" "1e4ee28560782de23e39433d537c0c0d66a5765fcb2f2765b9c90c3ec9187622", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1e4ee28560782de23e39433d537c0c0d66a5765fcb2f2765b9c90c3ec9187622", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1e4ee28560782de23e39433d537c0c0d66a5765fcb2f2765b9c90c3ec9187622", kill_on_drop: false }`
[INFO] [stdout] 1e4ee28560782de23e39433d537c0c0d66a5765fcb2f2765b9c90c3ec9187622
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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@sha256:0cd99ca24d8e8c98e67c542213511d985b8778b5bdcbb160e038429496686047" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-02-22" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 870921b7389a343848a39748a94e7d92a1d2f1c7ceb304f4fa0f9a94a4792223
[INFO] running `Command { std: "docker" "start" "-a" "870921b7389a343848a39748a94e7d92a1d2f1c7ceb304f4fa0f9a94a4792223", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling libc v0.2.112
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.85
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling once_cell v1.9.0
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling bytes v1.1.0
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling pin-project-lite v0.2.8
[INFO] [stderr]    Compiling smallvec v1.8.0
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling futures-core v0.3.19
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling crossbeam-utils v0.8.6
[INFO] [stderr]    Compiling serde_derive v1.0.133
[INFO] [stderr]    Compiling serde v1.0.133
[INFO] [stderr]    Compiling cc v1.0.72
[INFO] [stderr]    Compiling pkg-config v0.3.24
[INFO] [stderr]    Compiling itoa v1.0.1
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.78
[INFO] [stderr]    Compiling futures-task v0.3.19
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.6
[INFO] [stderr]    Compiling futures-util v0.3.19
[INFO] [stderr]    Compiling crc32fast v1.3.0
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling pin-utils v0.1.0
[INFO] [stderr]    Compiling fnv v1.0.7
[INFO] [stderr]    Compiling futures-sink v0.3.19
[INFO] [stderr]    Compiling bumpalo v3.9.1
[INFO] [stderr]    Compiling anyhow v1.0.52
[INFO] [stderr]    Compiling adler v1.0.2
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling siphasher v0.3.9
[INFO] [stderr]    Compiling matches v0.1.9
[INFO] [stderr]    Compiling httparse v1.5.1
[INFO] [stderr]    Compiling tower-service v0.3.1
[INFO] [stderr]    Compiling openssl v0.10.38
[INFO] [stderr]    Compiling foreign-types-shared v0.1.1
[INFO] [stderr]    Compiling futures-channel v0.3.19
[INFO] [stderr]    Compiling wasm-bindgen v0.2.78
[INFO] [stderr]    Compiling percent-encoding v2.1.0
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[INFO] [stderr]    Compiling try-lock v0.2.3
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[INFO] [stderr]    Compiling alloc-no-stdlib v2.0.3
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[INFO] [stderr]    Compiling itoa v0.4.8
[INFO] [stderr]    Compiling tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling adler32 v1.2.0
[INFO] [stderr]    Compiling matrixmultiply v0.1.15
[INFO] [stderr]    Compiling httpdate v1.0.2
[INFO] [stderr]    Compiling openssl-probe v0.1.5
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling weezl v0.1.5
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling rawpointer v0.1.0
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling unicode-bidi v0.3.7
[INFO] [stderr]    Compiling fixedbitset v0.2.0
[INFO] [stderr]    Compiling const_fn v0.4.9
[INFO] [stderr]    Compiling fastrand v1.6.0
[INFO] [stderr]    Compiling ttf-parser v0.6.2
[INFO] [stderr]    Compiling color_quant v1.1.0
[INFO] [stderr]    Compiling encoding_rs v0.8.30
[INFO] [stderr]    Compiling remove_dir_all v0.5.3
[INFO] [stderr]    Compiling scoped_threadpool v0.1.9
[INFO] [stderr]    Compiling base64 v0.13.0
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[INFO] [stderr]    Compiling async-trait v0.1.52
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[INFO] [stderr]    Compiling mime v0.3.16
[INFO] [stderr]    Compiling unicode-width v0.1.9
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling textwrap v0.14.2
[INFO] [stderr]    Compiling termcolor v1.1.2
[INFO] [stderr]    Compiling sync_wrapper v0.1.1
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling perlin2d v0.2.6
[INFO] [stderr]    Compiling data_algorithm v0.1.0 (/opt/rustwide/workdir/data_algorithm)
[INFO] [stderr]    Compiling instant v0.1.12
[INFO] [stderr]    Compiling tracing-core v0.1.21
[INFO] [stderr]    Compiling sharded-slab v0.1.4
[INFO] [stderr]    Compiling thread_local v1.1.3
[INFO] [stderr]    Compiling lock_api v0.4.5
[INFO] [stderr]    Compiling tinyvec v1.5.1
[INFO] [stderr]    Compiling foreign-types v0.3.2
[INFO] [stderr]    Compiling alloc-stdlib v0.2.1
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling indexmap v1.8.0
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling num-bigint v0.3.3
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling itertools v0.10.3
[INFO] [stderr]    Compiling num-rational v0.3.2
[INFO] [stderr]    Compiling form_urlencoded v1.0.1
[INFO] [stderr]    Compiling deflate v0.8.6
[INFO] [stderr]    Compiling miniz_oxide v0.3.7
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]    Compiling ahash v0.7.6
[INFO] [stderr]    Compiling standback v0.2.17
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stdout] warning: struct is never constructed: `Solution`
[INFO] [stdout]  --> data_algorithm/src/back_track/n_queens.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Solution {}
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `solve_n_queens`
[INFO] [stdout]   --> data_algorithm/src/back_track/n_queens.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 |     pub fn solve_n_queens(n: i32) -> Vec<Vec<String>> {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `set_queen`
[INFO] [stdout]   --> data_algorithm/src/back_track/n_queens.rs:26:4
[INFO] [stdout]    |
[INFO] [stdout] 26 | fn set_queen(n: i32, queens: &mut HashMap<i32, i32>, queen_list: &mut Vec<Vec<String>>, row: i32) {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_queens`
[INFO] [stdout]   --> data_algorithm/src/back_track/n_queens.rs:40:4
[INFO] [stdout]    |
[INFO] [stdout] 40 | fn print_queens(queens: &mut HashMap<i32, i32>, queen_list: &mut Vec<Vec<String>>, n: i32) {
[INFO] [stdout]    |    ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `is_ok`
[INFO] [stdout]   --> data_algorithm/src/back_track/n_queens.rs:56:4
[INFO] [stdout]    |
[INFO] [stdout] 56 | fn is_ok(row: i32, col: i32, queens: &mut HashMap<i32, i32>, n: i32) -> bool {
[INFO] [stdout]    |    ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `print_queen`
[INFO] [stdout]   --> data_algorithm/src/back_track/n_queens.rs:86:4
[INFO] [stdout]    |
[INFO] [stdout] 86 | fn print_queen(re: &Vec<Vec<String>>) {
[INFO] [stdout]    |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling time v0.2.27
[INFO] [stderr]    Compiling http v0.2.6
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling conv v0.3.3
[INFO] [stderr]    Compiling brotli-decompressor v2.3.2
[INFO] [stderr]    Compiling getopts v0.2.21
[INFO] [stderr]    Compiling gif v0.11.3
[INFO] [stderr]    Compiling phf v0.8.0
[INFO] [stderr] error: could not compile `regex-syntax`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name regex_syntax --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/regex-syntax-0.6.25/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 --cfg 'feature="default"' --cfg 'feature="unicode"' --cfg 'feature="unicode-age"' --cfg 'feature="unicode-bool"' --cfg 'feature="unicode-case"' --cfg 'feature="unicode-gencat"' --cfg 'feature="unicode-perl"' --cfg 'feature="unicode-script"' --cfg 'feature="unicode-segment"' -C metadata=fd0c3ba7c22fa1f4 -C extra-filename=-fd0c3ba7c22fa1f4 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "870921b7389a343848a39748a94e7d92a1d2f1c7ceb304f4fa0f9a94a4792223", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "870921b7389a343848a39748a94e7d92a1d2f1c7ceb304f4fa0f9a94a4792223", kill_on_drop: false }`
[INFO] [stdout] 870921b7389a343848a39748a94e7d92a1d2f1c7ceb304f4fa0f9a94a4792223