[INFO] updating cached repository https://github.com/Anfid/presentation
[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] 17a1c2c7317411c8193b51116b5ce24356e85eb5
[INFO] testing Anfid/presentation against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAnfid%2Fpresentation" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Anfid/presentation on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/Anfid/presentation
[INFO] finished tweaking git repo https://github.com/Anfid/presentation
[INFO] tweaked toml for git repo https://github.com/Anfid/presentation written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/Anfid/presentation already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+1.44.0" "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] 2aa91c9f477c6b3d47ca9408891e5130aac0de17e816ff6356d04d04ea34411d
[INFO] running `"docker" "start" "-a" "2aa91c9f477c6b3d47ca9408891e5130aac0de17e816ff6356d04d04ea34411d"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling arrayvec v0.4.11
[INFO] [stderr]    Compiling crossbeam-utils v0.6.6
[INFO] [stderr]    Compiling memoffset v0.5.1
[INFO] [stderr]    Compiling crossbeam-queue v0.1.2
[INFO] [stderr]    Compiling crossbeam-epoch v0.7.2
[INFO] [stderr]    Compiling crossbeam-deque v0.7.1
[INFO] [stderr]    Compiling rayon-core v1.6.0
[INFO] [stderr]    Compiling rayon v1.2.0
[INFO] [stderr]    Compiling presentation v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: value assigned to `x` is never read
[INFO] [stderr]   --> src/bin/borrowing.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 |     x = String::from("Hello");
[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[E0506]: cannot assign to `x` because it is borrowed
[INFO] [stderr]   --> src/bin/borrowing.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let y = &x;
[INFO] [stderr]    |             -- borrow of `x` occurs here
[INFO] [stderr] 11 | 
[INFO] [stderr] 12 |     x = String::from("Hello");
[INFO] [stderr]    |     ^ assignment to borrowed `x` occurs here
[INFO] [stderr] 13 | 
[INFO] [stderr] 14 |     println!("{}", y);
[INFO] [stderr]    |                    - borrow later used here
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error; 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0506`.
[INFO] [stderr] error: could not compile `presentation`.
[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] [stderr] error: build failed
[INFO] running `"docker" "inspect" "2aa91c9f477c6b3d47ca9408891e5130aac0de17e816ff6356d04d04ea34411d"`
[INFO] running `"docker" "rm" "-f" "2aa91c9f477c6b3d47ca9408891e5130aac0de17e816ff6356d04d04ea34411d"`
[INFO] [stdout] 2aa91c9f477c6b3d47ca9408891e5130aac0de17e816ff6356d04d04ea34411d