[INFO] updating cached repository lelandbatey/rust_mandelbrot
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/lelandbatey/rust_mandelbrot
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/lelandbatey/rust_mandelbrot" "work/ex/beta-1.38-1/sources/1.37.0/gh/lelandbatey/rust_mandelbrot"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/lelandbatey/rust_mandelbrot'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/lelandbatey/rust_mandelbrot" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lelandbatey/rust_mandelbrot"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lelandbatey/rust_mandelbrot'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b8ab5693b62ee84ead5f4435ffaa056b97081c2d
[INFO] sha for GitHub repo lelandbatey/rust_mandelbrot: b8ab5693b62ee84ead5f4435ffaa056b97081c2d
[INFO] validating manifest of lelandbatey/rust_mandelbrot 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 lelandbatey/rust_mandelbrot 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 lelandbatey/rust_mandelbrot
[INFO] finished frobbing lelandbatey/rust_mandelbrot
[INFO] frobbed toml for lelandbatey/rust_mandelbrot written to work/ex/beta-1.38-1/sources/1.37.0/gh/lelandbatey/rust_mandelbrot/Cargo.toml
[INFO] started frobbing lelandbatey/rust_mandelbrot
[INFO] finished frobbing lelandbatey/rust_mandelbrot
[INFO] frobbed toml for lelandbatey/rust_mandelbrot written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/lelandbatey/rust_mandelbrot/Cargo.toml
[INFO] crate lelandbatey/rust_mandelbrot 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing lelandbatey/rust_mandelbrot 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-0/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/lelandbatey/rust_mandelbrot:/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] 4300b0b7f1e11c17a0cd7884bf5ea94ea0311a007346b404986a79fe5d2d378d
[INFO] running `"docker" "start" "-a" "4300b0b7f1e11c17a0cd7884bf5ea94ea0311a007346b404986a79fe5d2d378d"`
[INFO] [stderr]    Compiling argparse v0.2.1
[INFO] [stderr]    Compiling mandelbrot v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::cmp`
[INFO] [stderr]   --> src/main.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::cmp;
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.06s
[INFO] running `"docker" "inspect" "4300b0b7f1e11c17a0cd7884bf5ea94ea0311a007346b404986a79fe5d2d378d"`
[INFO] running `"docker" "rm" "-f" "4300b0b7f1e11c17a0cd7884bf5ea94ea0311a007346b404986a79fe5d2d378d"`
[INFO] [stdout] 4300b0b7f1e11c17a0cd7884bf5ea94ea0311a007346b404986a79fe5d2d378d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/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/lelandbatey/rust_mandelbrot:/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" "test" "--frozen" "--no-run"`
[INFO] [stdout] 8dbd78aa45dc1f259a706d067a4eee7cb7ad42a9a4b9e0421ee37139a54be428
[INFO] running `"docker" "start" "-a" "8dbd78aa45dc1f259a706d067a4eee7cb7ad42a9a4b9e0421ee37139a54be428"`
[INFO] [stderr]    Compiling mandelbrot v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused import: `std::cmp`
[INFO] [stderr]   --> src/main.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 | use std::cmp;
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.83s
[INFO] running `"docker" "inspect" "8dbd78aa45dc1f259a706d067a4eee7cb7ad42a9a4b9e0421ee37139a54be428"`
[INFO] running `"docker" "rm" "-f" "8dbd78aa45dc1f259a706d067a4eee7cb7ad42a9a4b9e0421ee37139a54be428"`
[INFO] [stdout] 8dbd78aa45dc1f259a706d067a4eee7cb7ad42a9a4b9e0421ee37139a54be428
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/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/lelandbatey/rust_mandelbrot:/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" "test" "--frozen"`
[INFO] [stdout] e46880dfebc1ee37a1e9fd26748ed97ecc96901b46d331bbe9e9450705096cd2
[INFO] running `"docker" "start" "-a" "e46880dfebc1ee37a1e9fd26748ed97ecc96901b46d331bbe9e9450705096cd2"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/mandelbrot-742193c8f08a0f41
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "e46880dfebc1ee37a1e9fd26748ed97ecc96901b46d331bbe9e9450705096cd2"`
[INFO] running `"docker" "rm" "-f" "e46880dfebc1ee37a1e9fd26748ed97ecc96901b46d331bbe9e9450705096cd2"`
[INFO] [stdout] e46880dfebc1ee37a1e9fd26748ed97ecc96901b46d331bbe9e9450705096cd2