[INFO] cloning repository https://github.com/kdnk/rust_introduction [INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kdnk/rust_introduction" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkdnk%2Frust_introduction"` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkdnk%2Frust_introduction'... [INFO] running `"git" "rev-parse" "HEAD"` [INFO] [stdout] 4a644f9533c899940a70df93d978e23509f90120 [INFO] checking kdnk/rust_introduction against master#0cbcb17d3306d6e22eafc2c05ce885db97d0189c for pr-68766 [INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkdnk%2Frust_introduction" "/workspace/builds/worker-0/source"` [INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/kdnk/rust_introduction on toolchain 0cbcb17d3306d6e22eafc2c05ce885db97d0189c [INFO] running `"/workspace/cargo-home/bin/cargo" "+0cbcb17d3306d6e22eafc2c05ce885db97d0189c" "read-manifest" "--manifest-path" "Cargo.toml"` [INFO] started tweaking git repo https://github.com/kdnk/rust_introduction [INFO] finished tweaking git repo https://github.com/kdnk/rust_introduction [INFO] tweaked toml for git repo https://github.com/kdnk/rust_introduction written to /workspace/builds/worker-0/source/Cargo.toml [INFO] crate git repo https://github.com/kdnk/rust_introduction already has a lockfile, it will not be regenerated [INFO] running `"/workspace/cargo-home/bin/cargo" "+0cbcb17d3306d6e22eafc2c05ce885db97d0189c" "fetch" "--locked" "--manifest-path" "Cargo.toml"` [INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+0cbcb17d3306d6e22eafc2c05ce885db97d0189c" "check" "--frozen" "--all" "--all-targets"` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 2a2a21d1f6dfc78743e8ba83ffa6d014db4f960e9acf1aff230fd34726a97f6c [INFO] running `"docker" "start" "-a" "2a2a21d1f6dfc78743e8ba83ffa6d014db4f960e9acf1aff230fd34726a97f6c"` [INFO] [stderr] Checking rust_introduction v0.1.0 (/opt/rustwide/workdir) [INFO] [stderr] warning: unused variable: `data` [INFO] [stderr] --> src/08_trait/02_trait_generics.rs:30:9 [INFO] [stderr] | [INFO] [stderr] 30 | let data = Box::init("foo"); [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_data` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `data` [INFO] [stderr] --> src/08_trait/02_trait_generics.rs:31:9 [INFO] [stderr] | [INFO] [stderr] 31 | let data = Box::::init(0.1); [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_data` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `data` [INFO] [stderr] --> src/08_trait/02_trait_generics.rs:32:9 [INFO] [stderr] | [INFO] [stderr] 32 | let data: Box = Init::init(0.1); [INFO] [stderr] | ^^^^ help: consider prefixing with an underscore: `_data` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `one_u32` [INFO] [stderr] --> src/08_trait/02_trait_generics.rs:34:9 [INFO] [stderr] | [INFO] [stderr] 34 | let one_u32: u32 = 1.cast(); [INFO] [stderr] | ^^^^^^^ help: consider prefixing with an underscore: `_one_u32` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `one_u32` [INFO] [stderr] --> src/08_trait/02_trait_generics.rs:35:9 [INFO] [stderr] | [INFO] [stderr] 35 | let one_u32: u64 = 1.cast(); [INFO] [stderr] | ^^^^^^^ help: consider prefixing with an underscore: `_one_u32` [INFO] [stderr] [INFO] [stderr] warning: struct is never constructed: `Polygon` [INFO] [stderr] --> src/05_user_defined_types/06_struct.rs:1:8 [INFO] [stderr] | [INFO] [stderr] 1 | struct Polygon { [INFO] [stderr] | ^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: struct is never constructed: `Triangle` [INFO] [stderr] --> src/05_user_defined_types/06_struct.rs:7:8 [INFO] [stderr] | [INFO] [stderr] 7 | struct Triangle(Vertex, Vertex, Vertex); [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct is never constructed: `Vertex` [INFO] [stderr] --> src/05_user_defined_types/06_struct.rs:8:8 [INFO] [stderr] | [INFO] [stderr] 8 | struct Vertex(i32, i32); [INFO] [stderr] | ^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: struct is never constructed: `UniqueValue` [INFO] [stderr] --> src/05_user_defined_types/06_struct.rs:10:8 [INFO] [stderr] | [INFO] [stderr] 10 | struct UniqueValue; [INFO] [stderr] | ^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: unused variable: `string` [INFO] [stderr] --> src/06_basic/02_match.rs:4:9 [INFO] [stderr] | [INFO] [stderr] 4 | let string = match unknown { [INFO] [stderr] | ^^^^^^ help: consider prefixing with an underscore: `_string` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: value passed to `n` is never read [INFO] [stderr] --> src/04_primitive/scalar.rs:5:11 [INFO] [stderr] | [INFO] [stderr] 5 | fn f1(mut n: u32) { [INFO] [stderr] | ^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_assignments)]` on by default [INFO] [stderr] = help: maybe it is overwritten before being read? [INFO] [stderr] [INFO] [stderr] error: couldn't read src/07_ownership/use_toy_vec.rs: No such file or directory (os error 2) [INFO] [stderr] [INFO] [stderr] error: aborting due to previous error [INFO] [stderr] [INFO] [stderr] error: could not compile `rust_introduction`. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] error: couldn't read src/07_ownership/03_copy.rs: No such file or directory (os error 2) [INFO] [stderr] [INFO] [stderr] error: aborting due to previous error [INFO] [stderr] [INFO] [stderr] error: could not compile `rust_introduction`. [INFO] [stderr] warning: build failed, waiting for other jobs to finish... [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/05_user_defined_types/02_string.rs:5:9 [INFO] [stderr] | [INFO] [stderr] 5 | let mut s3 = "ストロベリー".to_owned(); [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: function is never used: `add0` [INFO] [stderr] --> src/05_user_defined_types/04_result.rs:12:4 [INFO] [stderr] | [INFO] [stderr] 12 | fn add0(s0: &str, s1: &str) -> Result { [INFO] [stderr] | ^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] error: build failed [INFO] running `"docker" "inspect" "2a2a21d1f6dfc78743e8ba83ffa6d014db4f960e9acf1aff230fd34726a97f6c"` [INFO] running `"docker" "rm" "-f" "2a2a21d1f6dfc78743e8ba83ffa6d014db4f960e9acf1aff230fd34726a97f6c"` [INFO] [stdout] 2a2a21d1f6dfc78743e8ba83ffa6d014db4f960e9acf1aff230fd34726a97f6c