[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 try#f149601db42efe10ece8b284ab681fd4a6fcb89c for pr-68766
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkdnk%2Frust_introduction" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/kdnk/rust_introduction on toolchain f149601db42efe10ece8b284ab681fd4a6fcb89c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "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-1/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" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+f149601db42efe10ece8b284ab681fd4a6fcb89c" "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] d5979f9e6c9914370056dcf7e263756b2c1a1c6f3647177da1be146161b889e9
[INFO] running `"docker" "start" "-a" "d5979f9e6c9914370056dcf7e263756b2c1a1c6f3647177da1be146161b889e9"`
[INFO] [stderr]     Checking rust_introduction v0.1.0 (/opt/rustwide/workdir)
[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] error: couldn't read src/07_ownership/02_value_scope.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/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/02_value_scope.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: unused variable: `v1`
[INFO] [stderr]   --> src/05_user_defined_types/01_main_types.rs:11:9
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let v1 = vec![false, true, false];
[INFO] [stderr]    |         ^^ help: consider prefixing with an underscore: `_v1`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v4`
[INFO] [stderr]   --> src/05_user_defined_types/01_main_types.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let v4 = vec![vec!['a', 'b', 'c'], vec!['d']];
[INFO] [stderr]    |         ^^ help: consider prefixing with an underscore: `_v4`
[INFO] [stderr] 
[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] error: build failed
[INFO] running `"docker" "inspect" "d5979f9e6c9914370056dcf7e263756b2c1a1c6f3647177da1be146161b889e9"`
[INFO] running `"docker" "rm" "-f" "d5979f9e6c9914370056dcf7e263756b2c1a1c6f3647177da1be146161b889e9"`
[INFO] [stdout] d5979f9e6c9914370056dcf7e263756b2c1a1c6f3647177da1be146161b889e9