[INFO] updating cached repository https://github.com/freegnu/learning-rust
[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] f302e7cd3b498eb0b657bd2dd734f142e8a8f0bf
[INFO] testing freegnu/learning-rust against 1.44.0 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffreegnu%2Flearning-rust" "/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/freegnu/learning-rust 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/freegnu/learning-rust
[INFO] finished tweaking git repo https://github.com/freegnu/learning-rust
[INFO] tweaked toml for git repo https://github.com/freegnu/learning-rust written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/freegnu/learning-rust 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] [stderr]     Blocking waiting for file lock on package cache
[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=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] 511bfd9458e44c24e28df34ce153440d1d4811786395e50a843316c7bb8fcab3
[INFO] running `"docker" "start" "-a" "511bfd9458e44c24e28df34ce153440d1d4811786395e50a843316c7bb8fcab3"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.40
[INFO] [stderr]    Compiling cfg-if v0.1.2
[INFO] [stderr]    Compiling futures v0.1.20
[INFO] [stderr]    Compiling byteorder v1.2.1
[INFO] [stderr]    Compiling nodrop v0.1.12
[INFO] [stderr]    Compiling slab v0.4.0
[INFO] [stderr]    Compiling lazycell v0.6.0
[INFO] [stderr]    Compiling memoffset v0.2.1
[INFO] [stderr]    Compiling scopeguard v0.3.3
[INFO] [stderr]    Compiling lazy_static v1.0.0
[INFO] [stderr]    Compiling version_check v0.1.3
[INFO] [stderr]    Compiling scoped-tls v0.1.1
[INFO] [stderr]    Compiling safemem v0.2.0
[INFO] [stderr]    Compiling smallvec v0.2.1
[INFO] [stderr]    Compiling slab v0.3.0
[INFO] [stderr]    Compiling take v0.1.0
[INFO] [stderr]    Compiling percent-encoding v1.0.1
[INFO] [stderr]    Compiling language-tags v0.2.2
[INFO] [stderr]    Compiling httparse v1.2.4
[INFO] [stderr]    Compiling log v0.4.1
[INFO] [stderr]    Compiling crossbeam-utils v0.3.2
[INFO] [stderr]    Compiling crossbeam-utils v0.2.2
[INFO] [stderr]    Compiling arrayvec v0.4.7
[INFO] [stderr]    Compiling base64 v0.9.0
[INFO] [stderr]    Compiling log v0.3.9
[INFO] [stderr]    Compiling unicase v2.1.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.4.1
[INFO] [stderr]    Compiling iovec v0.1.2
[INFO] [stderr]    Compiling net2 v0.2.32
[INFO] [stderr]    Compiling rand v0.4.2
[INFO] [stderr]    Compiling num_cpus v1.8.0
[INFO] [stderr]    Compiling time v0.1.39
[INFO] [stderr]    Compiling bytes v0.4.6
[INFO] [stderr]    Compiling crossbeam-deque v0.3.0
[INFO] [stderr]    Compiling mime v0.3.5
[INFO] [stderr]    Compiling mio v0.6.14
[INFO] [stderr]    Compiling rand v0.3.22
[INFO] [stderr]    Compiling tokio-executor v0.1.1
[INFO] [stderr]    Compiling tokio-io v0.1.6
[INFO] [stderr]    Compiling tokio-service v0.1.0
[INFO] [stderr]    Compiling relay v0.1.1
[INFO] [stderr]    Compiling futures-cpupool v0.1.8
[INFO] [stderr]    Compiling tokio-threadpool v0.1.1
[INFO] [stderr]    Compiling tokio-reactor v0.1.1
[INFO] [stderr]    Compiling tokio-tcp v0.1.0
[INFO] [stderr]    Compiling tokio-udp v0.1.0
[INFO] [stderr]    Compiling tokio v0.1.4
[INFO] [stderr]    Compiling tokio-core v0.1.16
[INFO] [stderr]    Compiling tokio-proto v0.1.1
[INFO] [stderr]    Compiling hyper v0.11.24
[INFO] [stderr]    Compiling learning-rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0433]: failed to resolve: use of undeclared type or module `ByteStr`
[INFO] [stderr]   --> src/main.rs:10:16
[INFO] [stderr]    |
[INFO] [stderr] 10 |     let bstr = ByteStr::new("http://web.mta.info/status/serviceStatus.txt");
[INFO] [stderr]    |                ^^^^^^^ use of undeclared type or module `ByteStr`
[INFO] [stderr] 
[INFO] [stderr] error[E0624]: associated function `new` is private
[INFO] [stderr]   --> src/main.rs:11:20
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let uri = Uri::new(bstr).unwrap();
[INFO] [stderr]    |                    ^^^ private associated function
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `send` found for struct `hyper::client::FutureResponse` in the current scope
[INFO] [stderr]   --> src/main.rs:18:10
[INFO] [stderr]    |
[INFO] [stderr] 18 |         .send()
[INFO] [stderr]    |          ^^^^ method not found in `hyper::client::FutureResponse`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::io::Read`
[INFO] [stderr]  --> src/main.rs:6:5
[INFO] [stderr]   |
[INFO] [stderr] 6 | use std::io::Read;
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 3 previous errors; 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0433, E0599, E0624.
[INFO] [stderr] For more information about an error, try `rustc --explain E0433`.
[INFO] [stderr] error: could not compile `learning-rust`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "511bfd9458e44c24e28df34ce153440d1d4811786395e50a843316c7bb8fcab3"`
[INFO] running `"docker" "rm" "-f" "511bfd9458e44c24e28df34ce153440d1d4811786395e50a843316c7bb8fcab3"`
[INFO] [stdout] 511bfd9458e44c24e28df34ce153440d1d4811786395e50a843316c7bb8fcab3