[INFO] updating cached repository learn-you-a-rust/loops_practice
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/learn-you-a-rust/loops_practice
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/learn-you-a-rust/loops_practice" "work/ex/beta-1.37-6/sources/1.36.0/gh/learn-you-a-rust/loops_practice"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/learn-you-a-rust/loops_practice'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/learn-you-a-rust/loops_practice" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/learn-you-a-rust/loops_practice"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/learn-you-a-rust/loops_practice'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] dfdbe339436b324208ad2441b5bc037ecd356e15
[INFO] sha for GitHub repo learn-you-a-rust/loops_practice: dfdbe339436b324208ad2441b5bc037ecd356e15
[INFO] validating manifest of learn-you-a-rust/loops_practice 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 learn-you-a-rust/loops_practice 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 learn-you-a-rust/loops_practice
[INFO] finished frobbing learn-you-a-rust/loops_practice
[INFO] frobbed toml for learn-you-a-rust/loops_practice written to work/ex/beta-1.37-6/sources/1.36.0/gh/learn-you-a-rust/loops_practice/Cargo.toml
[INFO] started frobbing learn-you-a-rust/loops_practice
[INFO] finished frobbing learn-you-a-rust/loops_practice
[INFO] frobbed toml for learn-you-a-rust/loops_practice written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/learn-you-a-rust/loops_practice/Cargo.toml
[INFO] crate learn-you-a-rust/loops_practice 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 learn-you-a-rust/loops_practice 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-3/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/learn-you-a-rust/loops_practice:/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] 53de17db4130f9981c1549b1d14d372b8bcdb2f6e69b1a8f0769bb4a7754440c
[INFO] running `"docker" "start" "-a" "53de17db4130f9981c1549b1d14d372b8bcdb2f6e69b1a8f0769bb4a7754440c"`
[INFO] [stderr]    Compiling loops_practice v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `fahrenheit_to_celsius_table`
[INFO] [stderr]  --> src/main.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | fn fahrenheit_to_celsius_table() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.44s
[INFO] running `"docker" "inspect" "53de17db4130f9981c1549b1d14d372b8bcdb2f6e69b1a8f0769bb4a7754440c"`
[INFO] running `"docker" "rm" "-f" "53de17db4130f9981c1549b1d14d372b8bcdb2f6e69b1a8f0769bb4a7754440c"`
[INFO] [stdout] 53de17db4130f9981c1549b1d14d372b8bcdb2f6e69b1a8f0769bb4a7754440c
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/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/learn-you-a-rust/loops_practice:/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] fe820442d7e81ec2f071203024937ba541c9f5321cd9cc906631c4484daf3659
[INFO] running `"docker" "start" "-a" "fe820442d7e81ec2f071203024937ba541c9f5321cd9cc906631c4484daf3659"`
[INFO] [stderr]    Compiling loops_practice v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `fahrenheit_to_celsius_table`
[INFO] [stderr]  --> src/main.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | fn fahrenheit_to_celsius_table() {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.41s
[INFO] running `"docker" "inspect" "fe820442d7e81ec2f071203024937ba541c9f5321cd9cc906631c4484daf3659"`
[INFO] running `"docker" "rm" "-f" "fe820442d7e81ec2f071203024937ba541c9f5321cd9cc906631c4484daf3659"`
[INFO] [stdout] fe820442d7e81ec2f071203024937ba541c9f5321cd9cc906631c4484daf3659
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-3/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/learn-you-a-rust/loops_practice:/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] 9c8f2280aaba8ec712f8eda9ad1ab7829dca300713c8048d37f49b8b446e8942
[INFO] running `"docker" "start" "-a" "9c8f2280aaba8ec712f8eda9ad1ab7829dca300713c8048d37f49b8b446e8942"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/loops_practice-0ece06389bbdac35
[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" "9c8f2280aaba8ec712f8eda9ad1ab7829dca300713c8048d37f49b8b446e8942"`
[INFO] running `"docker" "rm" "-f" "9c8f2280aaba8ec712f8eda9ad1ab7829dca300713c8048d37f49b8b446e8942"`
[INFO] [stdout] 9c8f2280aaba8ec712f8eda9ad1ab7829dca300713c8048d37f49b8b446e8942