[INFO] updating cached repository oberien/buddhabrot-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/oberien/buddhabrot-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/oberien/buddhabrot-rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/oberien/buddhabrot-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/oberien/buddhabrot-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/oberien/buddhabrot-rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/oberien/buddhabrot-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/oberien/buddhabrot-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 7837ef59d087653f156924e2ba42702434dbe3c2
[INFO] sha for GitHub repo oberien/buddhabrot-rust: 7837ef59d087653f156924e2ba42702434dbe3c2
[INFO] validating manifest of oberien/buddhabrot-rust on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of oberien/buddhabrot-rust on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing oberien/buddhabrot-rust
[INFO] finished frobbing oberien/buddhabrot-rust
[INFO] frobbed toml for oberien/buddhabrot-rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/oberien/buddhabrot-rust/Cargo.toml
[INFO] started frobbing oberien/buddhabrot-rust
[INFO] finished frobbing oberien/buddhabrot-rust
[INFO] frobbed toml for oberien/buddhabrot-rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/oberien/buddhabrot-rust/Cargo.toml
[INFO] crate oberien/buddhabrot-rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/oberien/buddhabrot-rust/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing oberien/buddhabrot-rust against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/oberien/buddhabrot-rust:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 122f901fdc5fc14d02f033a1f9400e0040fec96594a76ca7cd084ed988608de9
[INFO] running `"docker" "start" "-a" "122f901fdc5fc14d02f033a1f9400e0040fec96594a76ca7cd084ed988608de9"`
[INFO] [stderr]    Compiling libc v0.2.62
[INFO] [stderr]    Compiling nix v0.15.0
[INFO] [stderr]    Compiling num_cpus v1.10.1
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling rayon-core v1.5.0
[INFO] [stderr]    Compiling rayon v1.1.0
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling rand v0.3.23
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling jpeg-decoder v0.1.15
[INFO] [stderr]    Compiling image v0.22.1
[INFO] [stderr]    Compiling buddhabrot v0.0.1 (/opt/crater/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(box_syntax)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0061]: this function takes 1 parameter but 2 parameters were supplied
[INFO] [stderr]    --> src/render.rs:148:9
[INFO] [stderr]     |
[INFO] [stderr] 148 |     img.save(&mut file, image::PNG).unwrap();
[INFO] [stderr]     |         ^^^^ expected 1 parameter
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0061, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0061`.
[INFO] [stderr] error: Could not compile `buddhabrot`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "122f901fdc5fc14d02f033a1f9400e0040fec96594a76ca7cd084ed988608de9"`
[INFO] running `"docker" "rm" "-f" "122f901fdc5fc14d02f033a1f9400e0040fec96594a76ca7cd084ed988608de9"`
[INFO] [stdout] 122f901fdc5fc14d02f033a1f9400e0040fec96594a76ca7cd084ed988608de9