[INFO] crate tnetstring 0.2.0 is already in cache
[INFO] testing tnetstring-0.2.0 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate tnetstring 0.2.0 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate tnetstring 0.2.0 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 crates.io crate tnetstring 0.2.0
[INFO] finished tweaking crates.io crate tnetstring 0.2.0
[INFO] tweaked toml for crates.io crate tnetstring 0.2.0 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 706afa9687a8031f11742b8a4d1b832827ef6b7413379dc0445f1a3955c20485
[INFO] running `"docker" "start" "-a" "706afa9687a8031f11742b8a4d1b832827ef6b7413379dc0445f1a3955c20485"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling tnetstring v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: use of deprecated item 'std::error::Error::description': use the Display impl or to_string()
[INFO] [stderr]   --> src/error.rs:50:29
[INFO] [stderr]    |
[INFO] [stderr] 50 |         formatter.write_str(std::error::Error::description(self))
[INFO] [stderr]    |                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(deprecated)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0283]: type annotations needed for `&std::string::String`
[INFO] [stderr]   --> src/ser.rs:49:15
[INFO] [stderr]    |
[INFO] [stderr] 49 |         .map(|x| String::from(x.as_ref()))
[INFO] [stderr]    |               ^ consider giving this closure parameter the explicit type `&std::string::String`, where the type parameter `std::string::String` is specified
[INFO] [stderr]    |
[INFO] [stderr]    = note: cannot satisfy `std::string::String: std::convert::From<&_>`
[INFO] [stderr]    = note: required by `std::convert::From::from`
[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 E0283`.
[INFO] [stderr] error: could not compile `tnetstring`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "706afa9687a8031f11742b8a4d1b832827ef6b7413379dc0445f1a3955c20485"`
[INFO] running `"docker" "rm" "-f" "706afa9687a8031f11742b8a4d1b832827ef6b7413379dc0445f1a3955c20485"`
[INFO] [stdout] 706afa9687a8031f11742b8a4d1b832827ef6b7413379dc0445f1a3955c20485