[INFO] updating cached repository https://github.com/PsichiX/rust-maze-solver-benchmark
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 9470fae37e1c66cca95d29c752be2b23ff5ee65f
[INFO] testing PsichiX/rust-maze-solver-benchmark against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPsichiX%2Frust-maze-solver-benchmark" "/workspace/builds/worker-5/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/PsichiX/rust-maze-solver-benchmark on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/PsichiX/rust-maze-solver-benchmark
[INFO] finished tweaking git repo https://github.com/PsichiX/rust-maze-solver-benchmark
[INFO] tweaked toml for git repo https://github.com/PsichiX/rust-maze-solver-benchmark written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/PsichiX/rust-maze-solver-benchmark already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] aee521d3a96e5ebd40c96ba9ad4f8fdb7c209135d6d720bc29dcbd03d95a3e5b
[INFO] running `"docker" "start" "-a" "aee521d3a96e5ebd40c96ba9ad4f8fdb7c209135d6d720bc29dcbd03d95a3e5b"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.70
[INFO] [stderr]    Compiling fixedbitset v0.2.0
[INFO] [stderr]    Compiling petgraph v0.5.1
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling clap v2.33.1
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling rust-maze-solver-benchmark v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 23.12s
[INFO] running `"docker" "inspect" "aee521d3a96e5ebd40c96ba9ad4f8fdb7c209135d6d720bc29dcbd03d95a3e5b"`
[INFO] running `"docker" "rm" "-f" "aee521d3a96e5ebd40c96ba9ad4f8fdb7c209135d6d720bc29dcbd03d95a3e5b"`
[INFO] [stdout] aee521d3a96e5ebd40c96ba9ad4f8fdb7c209135d6d720bc29dcbd03d95a3e5b
[INFO] running `"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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-06-03" "test" "--frozen" "--no-run"`
[INFO] [stdout] b78efc300fda74a3bf440d1554f3d98b9d22ccccbe9464efa0658f9ba92764fd
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "b78efc300fda74a3bf440d1554f3d98b9d22ccccbe9464efa0658f9ba92764fd"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling rust-maze-solver-benchmark v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0425]: cannot find function `read_to_string` in this scope
[INFO] [stderr]    --> src/benchmarks/petgraph.rs:185:22
[INFO] [stderr]     |
[INFO] [stderr] 185 |         let source = read_to_string("./resources/maze.txt").unwrap();
[INFO] [stderr]     |                      ^^^^^^^^^^^^^^ not found in this scope
[INFO] [stderr]     |
[INFO] [stderr] help: consider importing this function
[INFO] [stderr]     |
[INFO] [stderr] 181 |     use std::fs::read_to_string;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `load_maze` in this scope
[INFO] [stderr]    --> src/benchmarks/petgraph.rs:186:20
[INFO] [stderr]     |
[INFO] [stderr] 186 |         let maze = load_maze("./resources/maze.txt");
[INFO] [stderr]     |                    ^^^^^^^^^ not found in this scope
[INFO] [stderr]     |
[INFO] [stderr] help: consider importing this function
[INFO] [stderr]     |
[INFO] [stderr] 181 |     use crate::load_maze;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `super::*`
[INFO] [stderr]    --> src/benchmarks/petgraph.rs:181:9
[INFO] [stderr]     |
[INFO] [stderr] 181 |     use super::*;
[INFO] [stderr]     |         ^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0425`.
[INFO] [stderr] error: could not compile `rust-maze-solver-benchmark`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "b78efc300fda74a3bf440d1554f3d98b9d22ccccbe9464efa0658f9ba92764fd"`
[INFO] running `"docker" "rm" "-f" "b78efc300fda74a3bf440d1554f3d98b9d22ccccbe9464efa0658f9ba92764fd"`
[INFO] [stdout] b78efc300fda74a3bf440d1554f3d98b9d22ccccbe9464efa0658f9ba92764fd