[INFO] updating cached repository retrage/smallpt
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/retrage/smallpt
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/retrage/smallpt" "work/ex/beta-1.38-1/sources/1.37.0/gh/retrage/smallpt"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/retrage/smallpt'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/retrage/smallpt" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/retrage/smallpt"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/retrage/smallpt'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] a8d277b8f7a1afab5b1258d3ba85db56222cfd6d
[INFO] sha for GitHub repo retrage/smallpt: a8d277b8f7a1afab5b1258d3ba85db56222cfd6d
[INFO] validating manifest of retrage/smallpt 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 retrage/smallpt 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 retrage/smallpt
[INFO] finished frobbing retrage/smallpt
[INFO] frobbed toml for retrage/smallpt written to work/ex/beta-1.38-1/sources/1.37.0/gh/retrage/smallpt/Cargo.toml
[INFO] started frobbing retrage/smallpt
[INFO] finished frobbing retrage/smallpt
[INFO] frobbed toml for retrage/smallpt written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/retrage/smallpt/Cargo.toml
[INFO] crate retrage/smallpt 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 retrage/smallpt against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/retrage/smallpt:/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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 9567a00b1e1c1b9b488f15bab23b500dda65d1c60b1cb4e0136f2cc4facf7544
[INFO] running `"docker" "start" "-a" "9567a00b1e1c1b9b488f15bab23b500dda65d1c60b1cb4e0136f2cc4facf7544"`
[INFO] [stderr]    Compiling libc v0.2.47
[INFO] [stderr]    Compiling rand v0.6.4
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_os v0.1.1
[INFO] [stderr]    Compiling smallpt v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:352:29
[INFO] [stderr]     |
[INFO] [stderr] 352 |                         let mut dx;
[INFO] [stderr]     |                             ----^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:359:29
[INFO] [stderr]     |
[INFO] [stderr] 359 |                         let mut dy;
[INFO] [stderr]     |                             ----^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.19s
[INFO] running `"docker" "inspect" "9567a00b1e1c1b9b488f15bab23b500dda65d1c60b1cb4e0136f2cc4facf7544"`
[INFO] running `"docker" "rm" "-f" "9567a00b1e1c1b9b488f15bab23b500dda65d1c60b1cb4e0136f2cc4facf7544"`
[INFO] [stdout] 9567a00b1e1c1b9b488f15bab23b500dda65d1c60b1cb4e0136f2cc4facf7544
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/retrage/smallpt:/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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 986b084b140bd251324758b069ad9b0beaf269d6d14552f2e3d3f7bd727aec4b
[INFO] running `"docker" "start" "-a" "986b084b140bd251324758b069ad9b0beaf269d6d14552f2e3d3f7bd727aec4b"`
[INFO] [stderr]    Compiling smallpt v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:352:29
[INFO] [stderr]     |
[INFO] [stderr] 352 |                         let mut dx;
[INFO] [stderr]     |                             ----^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:359:29
[INFO] [stderr]     |
[INFO] [stderr] 359 |                         let mut dy;
[INFO] [stderr]     |                             ----^^
[INFO] [stderr]     |                             |
[INFO] [stderr]     |                             help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.70s
[INFO] running `"docker" "inspect" "986b084b140bd251324758b069ad9b0beaf269d6d14552f2e3d3f7bd727aec4b"`
[INFO] running `"docker" "rm" "-f" "986b084b140bd251324758b069ad9b0beaf269d6d14552f2e3d3f7bd727aec4b"`
[INFO] [stdout] 986b084b140bd251324758b069ad9b0beaf269d6d14552f2e3d3f7bd727aec4b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/retrage/smallpt:/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" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] e1fa088a4307a5d8fc5091996f7135870ff8cab2ba1ec181bf80a78b4b773a71
[INFO] running `"docker" "start" "-a" "e1fa088a4307a5d8fc5091996f7135870ff8cab2ba1ec181bf80a78b4b773a71"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.06s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/smallpt-710eb54c5d8d1dac
[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" "e1fa088a4307a5d8fc5091996f7135870ff8cab2ba1ec181bf80a78b4b773a71"`
[INFO] running `"docker" "rm" "-f" "e1fa088a4307a5d8fc5091996f7135870ff8cab2ba1ec181bf80a78b4b773a71"`
[INFO] [stdout] e1fa088a4307a5d8fc5091996f7135870ff8cab2ba1ec181bf80a78b4b773a71