[INFO] updating cached repository DeltaManiac/tiny_rusty_raytracer
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/DeltaManiac/tiny_rusty_raytracer
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/DeltaManiac/tiny_rusty_raytracer" "work/ex/beta-1.37-6/sources/1.36.0/gh/DeltaManiac/tiny_rusty_raytracer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/DeltaManiac/tiny_rusty_raytracer'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/DeltaManiac/tiny_rusty_raytracer" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/DeltaManiac/tiny_rusty_raytracer"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/DeltaManiac/tiny_rusty_raytracer'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 66f6b91449ac4e8d17139eb99b73773972144f79
[INFO] sha for GitHub repo DeltaManiac/tiny_rusty_raytracer: 66f6b91449ac4e8d17139eb99b73773972144f79
[INFO] validating manifest of DeltaManiac/tiny_rusty_raytracer on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of DeltaManiac/tiny_rusty_raytracer on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing DeltaManiac/tiny_rusty_raytracer
[INFO] finished frobbing DeltaManiac/tiny_rusty_raytracer
[INFO] frobbed toml for DeltaManiac/tiny_rusty_raytracer written to work/ex/beta-1.37-6/sources/1.36.0/gh/DeltaManiac/tiny_rusty_raytracer/Cargo.toml
[INFO] started frobbing DeltaManiac/tiny_rusty_raytracer
[INFO] finished frobbing DeltaManiac/tiny_rusty_raytracer
[INFO] frobbed toml for DeltaManiac/tiny_rusty_raytracer written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/DeltaManiac/tiny_rusty_raytracer/Cargo.toml
[INFO] crate DeltaManiac/tiny_rusty_raytracer already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing DeltaManiac/tiny_rusty_raytracer against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/DeltaManiac/tiny_rusty_raytracer:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 412bb54b164441510be0221e517538c5355ecab67fd4425f162d216dd8277712
[INFO] running `"docker" "start" "-a" "412bb54b164441510be0221e517538c5355ecab67fd4425f162d216dd8277712"`
[INFO] [stderr]    Compiling tiny_rusty_raytracer v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `buffer`
[INFO] [stderr]  --> src/main.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let buffer = BufWriter::new(file);
[INFO] [stderr]   |         ^^^^^^ help: consider prefixing with an underscore: `_buffer`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `render`
[INFO] [stderr]  --> src/main.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | fn render() {
[INFO] [stderr]   | ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.82s
[INFO] running `"docker" "inspect" "412bb54b164441510be0221e517538c5355ecab67fd4425f162d216dd8277712"`
[INFO] running `"docker" "rm" "-f" "412bb54b164441510be0221e517538c5355ecab67fd4425f162d216dd8277712"`
[INFO] [stdout] 412bb54b164441510be0221e517538c5355ecab67fd4425f162d216dd8277712
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/DeltaManiac/tiny_rusty_raytracer:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 2f3885d7fd77f6355abf700d3cda5b49b123c2fd27fc5f448a3d136d83e6ee5c
[INFO] running `"docker" "start" "-a" "2f3885d7fd77f6355abf700d3cda5b49b123c2fd27fc5f448a3d136d83e6ee5c"`
[INFO] [stderr]    Compiling tiny_rusty_raytracer v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `buffer`
[INFO] [stderr]  --> src/main.rs:8:9
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let buffer = BufWriter::new(file);
[INFO] [stderr]   |         ^^^^^^ help: consider prefixing with an underscore: `_buffer`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `render`
[INFO] [stderr]  --> src/main.rs:6:1
[INFO] [stderr]   |
[INFO] [stderr] 6 | fn render() {
[INFO] [stderr]   | ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.69s
[INFO] running `"docker" "inspect" "2f3885d7fd77f6355abf700d3cda5b49b123c2fd27fc5f448a3d136d83e6ee5c"`
[INFO] running `"docker" "rm" "-f" "2f3885d7fd77f6355abf700d3cda5b49b123c2fd27fc5f448a3d136d83e6ee5c"`
[INFO] [stdout] 2f3885d7fd77f6355abf700d3cda5b49b123c2fd27fc5f448a3d136d83e6ee5c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-2/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/DeltaManiac/tiny_rusty_raytracer:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 412be9eb8040ac1f82af95fbf362786c2134345cd228e12368bb71f308d68901
[INFO] running `"docker" "start" "-a" "412be9eb8040ac1f82af95fbf362786c2134345cd228e12368bb71f308d68901"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/tiny_rusty_raytracer-76b05bc91a8ce7d8
[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" "412be9eb8040ac1f82af95fbf362786c2134345cd228e12368bb71f308d68901"`
[INFO] running `"docker" "rm" "-f" "412be9eb8040ac1f82af95fbf362786c2134345cd228e12368bb71f308d68901"`
[INFO] [stdout] 412be9eb8040ac1f82af95fbf362786c2134345cd228e12368bb71f308d68901