[INFO] updating cached repository nick-hill/SamplePrograms
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/nick-hill/SamplePrograms
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/nick-hill/SamplePrograms" "work/ex/beta-1.38-1/sources/1.37.0/gh/nick-hill/SamplePrograms"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/nick-hill/SamplePrograms'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/nick-hill/SamplePrograms" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nick-hill/SamplePrograms"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nick-hill/SamplePrograms'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d418698644a2ac4c15b0d5c090b4289a0829a878
[INFO] sha for GitHub repo nick-hill/SamplePrograms: d418698644a2ac4c15b0d5c090b4289a0829a878
[INFO] validating manifest of nick-hill/SamplePrograms 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 nick-hill/SamplePrograms 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 nick-hill/SamplePrograms
[INFO] finished frobbing nick-hill/SamplePrograms
[INFO] frobbed toml for nick-hill/SamplePrograms written to work/ex/beta-1.38-1/sources/1.37.0/gh/nick-hill/SamplePrograms/Cargo.toml
[INFO] started frobbing nick-hill/SamplePrograms
[INFO] finished frobbing nick-hill/SamplePrograms
[INFO] frobbed toml for nick-hill/SamplePrograms written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/nick-hill/SamplePrograms/Cargo.toml
[INFO] crate nick-hill/SamplePrograms 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 nick-hill/SamplePrograms 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-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/nick-hill/SamplePrograms:/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] 436126a3e27abc95adee5c989848182fe614a7400edc2d859dd668ab3575d36b
[INFO] running `"docker" "start" "-a" "436126a3e27abc95adee5c989848182fe614a7400edc2d859dd668ab3575d36b"`
[INFO] [stderr]    Compiling SamplePrograms v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/bubble_sort.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |     for x in 0..var{
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: crate `SamplePrograms` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_snake_case)] on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `sample_programs`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.98s
[INFO] running `"docker" "inspect" "436126a3e27abc95adee5c989848182fe614a7400edc2d859dd668ab3575d36b"`
[INFO] running `"docker" "rm" "-f" "436126a3e27abc95adee5c989848182fe614a7400edc2d859dd668ab3575d36b"`
[INFO] [stdout] 436126a3e27abc95adee5c989848182fe614a7400edc2d859dd668ab3575d36b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/nick-hill/SamplePrograms:/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] f8b82c999b63dac7dafa390cf6d5d3923ebe8ce1785f1dd103aeccf023eaa715
[INFO] running `"docker" "start" "-a" "f8b82c999b63dac7dafa390cf6d5d3923ebe8ce1785f1dd103aeccf023eaa715"`
[INFO] [stderr]    Compiling SamplePrograms v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/bubble_sort.rs:15:9
[INFO] [stderr]    |
[INFO] [stderr] 15 |     for x in 0..var{
[INFO] [stderr]    |         ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: crate `SamplePrograms` should have a snake case name
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(non_snake_case)] on by default
[INFO] [stderr]   = help: convert the identifier to snake case: `sample_programs`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.74s
[INFO] running `"docker" "inspect" "f8b82c999b63dac7dafa390cf6d5d3923ebe8ce1785f1dd103aeccf023eaa715"`
[INFO] running `"docker" "rm" "-f" "f8b82c999b63dac7dafa390cf6d5d3923ebe8ce1785f1dd103aeccf023eaa715"`
[INFO] [stdout] f8b82c999b63dac7dafa390cf6d5d3923ebe8ce1785f1dd103aeccf023eaa715
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/nick-hill/SamplePrograms:/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] aa719ad05044880e9f9fd4f5e17416b79aa43d8b914fb5384b23ea3dd677aa53
[INFO] running `"docker" "start" "-a" "aa719ad05044880e9f9fd4f5e17416b79aa43d8b914fb5384b23ea3dd677aa53"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/SamplePrograms-f7eb45d7099d9b8f
[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" "aa719ad05044880e9f9fd4f5e17416b79aa43d8b914fb5384b23ea3dd677aa53"`
[INFO] running `"docker" "rm" "-f" "aa719ad05044880e9f9fd4f5e17416b79aa43d8b914fb5384b23ea3dd677aa53"`
[INFO] [stdout] aa719ad05044880e9f9fd4f5e17416b79aa43d8b914fb5384b23ea3dd677aa53