[INFO] updating cached repository https://github.com/sutetako/rust_learning
[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] 69ae47d04f313d24b1b40ef9c7ea7c4f9920a3d0
[INFO] testing sutetako/rust_learning against beta-2020-06-03 for beta-1.45-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsutetako%2Frust_learning" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sutetako/rust_learning 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/sutetako/rust_learning
[INFO] finished tweaking git repo https://github.com/sutetako/rust_learning
[INFO] tweaked toml for git repo https://github.com/sutetako/rust_learning written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/sutetako/rust_learning 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-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] 581b41a97d0bc0e55e5540003510d8f1f63a803fb906e0a45bb49e1dcf10b88c
[INFO] running `"docker" "start" "-a" "581b41a97d0bc0e55e5540003510d8f1f63a803fb906e0a45bb49e1dcf10b88c"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling serde v1.0.99
[INFO] [stderr]    Compiling serde_json v1.0.40
[INFO] [stderr]    Compiling rust_learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.05s
[INFO] running `"docker" "inspect" "581b41a97d0bc0e55e5540003510d8f1f63a803fb906e0a45bb49e1dcf10b88c"`
[INFO] running `"docker" "rm" "-f" "581b41a97d0bc0e55e5540003510d8f1f63a803fb906e0a45bb49e1dcf10b88c"`
[INFO] [stdout] 581b41a97d0bc0e55e5540003510d8f1f63a803fb906e0a45bb49e1dcf10b88c
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 0908fe8b0114e5416aca29a7263fa4bb3c96ad237a79e8b6862f9e99a80b36ae
[INFO] running `"docker" "start" "-a" "0908fe8b0114e5416aca29a7263fa4bb3c96ad237a79e8b6862f9e99a80b36ae"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling rust_learning v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/main.rs:1814:32
[INFO] [stderr]      |
[INFO] [stderr] 1814 |         fn say_hello(out: &mut Write) -> std::io::Result<()> {
[INFO] [stderr]      |                                ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]     --> src/main.rs:1840:26
[INFO] [stderr]      |
[INFO] [stderr] 1840 |         let writer: &mut Write = &mut buf; // ok
[INFO] [stderr]      |                          ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: use of deprecated item 'core::str::<impl str>::trim_right_matches': superseded by `trim_end_matches`
[INFO] [stderr]     --> src/main.rs:1469:27
[INFO] [stderr]      |
[INFO] [stderr] 1469 |             self.plural().trim_right_matches('s')
[INFO] [stderr]      |                           ^^^^^^^^^^^^^^^^^^ help: replace the use of the deprecated item: `trim_end_matches`
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0109]: type arguments are not allowed for this type
[INFO] [stderr]     --> src/main.rs:1854:15
[INFO] [stderr]      |
[INFO] [stderr] 1854 |         buf::<Vec>.write_all(b"hello").expect("error");
[INFO] [stderr]      |               ^^^ type argument not allowed
[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 E0109`.
[INFO] [stderr] error: could not compile `rust_learning`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "0908fe8b0114e5416aca29a7263fa4bb3c96ad237a79e8b6862f9e99a80b36ae"`
[INFO] running `"docker" "rm" "-f" "0908fe8b0114e5416aca29a7263fa4bb3c96ad237a79e8b6862f9e99a80b36ae"`
[INFO] [stdout] 0908fe8b0114e5416aca29a7263fa4bb3c96ad237a79e8b6862f9e99a80b36ae