[INFO] cloning repository https://github.com/japrogramer/RustLand
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/japrogramer/RustLand" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjaprogramer%2FRustLand"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjaprogramer%2FRustLand'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 41ba75dd28ddc348cbea3f399dc2b27d70505057
[INFO] testing japrogramer/RustLand against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjaprogramer%2FRustLand" "/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/japrogramer/RustLand 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/japrogramer/RustLand
[INFO] finished tweaking git repo https://github.com/japrogramer/RustLand
[INFO] tweaked toml for git repo https://github.com/japrogramer/RustLand written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/japrogramer/RustLand 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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cpython v0.3.0
[INFO] [stderr]   Downloaded python3-sys v0.3.0
[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] d184cf1b1988f3799bc8cb82e91a99c1c0edf0b2046538b95c9298de43795359
[INFO] running `"docker" "start" "-a" "d184cf1b1988f3799bc8cb82e91a99c1c0edf0b2046538b95c9298de43795359"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling regex-syntax v0.6.12
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]    Compiling futures-core v0.3.1
[INFO] [stderr]    Compiling futures-sink v0.3.1
[INFO] [stderr]    Compiling futures-io v0.3.1
[INFO] [stderr]    Compiling futures-task v0.3.1
[INFO] [stderr]    Compiling cpython v0.3.0
[INFO] [stderr]    Compiling serde v1.0.101
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling num-traits v0.2.9
[INFO] [stderr]    Compiling futures-channel v0.3.1
[INFO] [stderr]    Compiling aho-corasick v0.7.6
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling regex v1.3.1
[INFO] [stderr]    Compiling python3-sys v0.3.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling serde_derive v1.0.101
[INFO] [stderr]    Compiling futures-macro v0.3.1
[INFO] [stderr]    Compiling futures-util v0.3.1
[INFO] [stderr]    Compiling futures-executor v0.3.1
[INFO] [stderr]    Compiling futures v0.3.1
[INFO] [stderr]    Compiling course v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(label_break_value)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `PathBuf`, `Path`
[INFO] [stderr]  --> src/main.rs:5:17
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::path::{Path, PathBuf};
[INFO] [stderr]   |                 ^^^^  ^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `PyDict`
[INFO] [stderr]  --> src/main.rs:7:23
[INFO] [stderr]   |
[INFO] [stderr] 7 | use cpython::{Python, PyDict, PyResult, PyModule};
[INFO] [stderr]   |                       ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:29:12
[INFO] [stderr]    |
[INFO] [stderr] 29 |     if let mut z = T::from_str("3") {
[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: aborting due to previous error; 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `course`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "d184cf1b1988f3799bc8cb82e91a99c1c0edf0b2046538b95c9298de43795359"`
[INFO] running `"docker" "rm" "-f" "d184cf1b1988f3799bc8cb82e91a99c1c0edf0b2046538b95c9298de43795359"`
[INFO] [stdout] d184cf1b1988f3799bc8cb82e91a99c1c0edf0b2046538b95c9298de43795359