[INFO] crate png2aa 0.1.2 is already in cache
[INFO] testing png2aa-0.1.2 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate png2aa 0.1.2 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate png2aa 0.1.2 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 png2aa 0.1.2
[INFO] finished tweaking crates.io crate png2aa 0.1.2
[INFO] tweaked toml for crates.io crate png2aa 0.1.2 written to /workspace/builds/worker-1/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-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" "+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] e190de5f09fcfb1af23d219e3fa0a4a9f0b1cd60dde300fb891d3c7193a68667
[INFO] running `"docker" "start" "-a" "e190de5f09fcfb1af23d219e3fa0a4a9f0b1cd60dde300fb891d3c7193a68667"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling ndarray v0.10.14
[INFO] [stderr]    Compiling string-error v0.1.0
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stderr]    Compiling num-complex v0.1.43
[INFO] [stderr]    Compiling png2aa v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #[macro_use] extern crate ndarray;
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/utils.rs:21:33
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub fn read_png(image_file: Box<Read>) -> Result<Array3<f32>, Box<Error>> {
[INFO] [stderr]    |                                 ^^^^ help: use `dyn`: `dyn Read`
[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/utils.rs:21:67
[INFO] [stderr]    |
[INFO] [stderr] 21 | pub fn read_png(image_file: Box<Read>) -> Result<Array3<f32>, Box<Error>> {
[INFO] [stderr]    |                                                                   ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/utils.rs:38:44
[INFO] [stderr]    |
[INFO] [stderr] 38 | pub fn write_grayscale_png(image_file: Box<Write>, img: &Array2<f32>) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                            ^^^^^ help: use `dyn`: `dyn Write`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/utils.rs:38:89
[INFO] [stderr]    |
[INFO] [stderr] 38 | pub fn write_grayscale_png(image_file: Box<Write>, img: &Array2<f32>) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                                                                         ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/cli.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(slice_patterns)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: could not compile `png2aa`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "e190de5f09fcfb1af23d219e3fa0a4a9f0b1cd60dde300fb891d3c7193a68667"`
[INFO] running `"docker" "rm" "-f" "e190de5f09fcfb1af23d219e3fa0a4a9f0b1cd60dde300fb891d3c7193a68667"`
[INFO] [stdout] e190de5f09fcfb1af23d219e3fa0a4a9f0b1cd60dde300fb891d3c7193a68667