[INFO] updating cached repository JohanLorenzo/rust-testing-example
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/JohanLorenzo/rust-testing-example
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/JohanLorenzo/rust-testing-example" "work/ex/beta-1.38-1/sources/1.37.0/gh/JohanLorenzo/rust-testing-example"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/JohanLorenzo/rust-testing-example'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/JohanLorenzo/rust-testing-example" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/JohanLorenzo/rust-testing-example"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/JohanLorenzo/rust-testing-example'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 757bdbf3887f43db9771c20cb72dfc32aa8f4321
[INFO] sha for GitHub repo JohanLorenzo/rust-testing-example: 757bdbf3887f43db9771c20cb72dfc32aa8f4321
[INFO] validating manifest of JohanLorenzo/rust-testing-example 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 JohanLorenzo/rust-testing-example 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 JohanLorenzo/rust-testing-example
[INFO] finished frobbing JohanLorenzo/rust-testing-example
[INFO] frobbed toml for JohanLorenzo/rust-testing-example written to work/ex/beta-1.38-1/sources/1.37.0/gh/JohanLorenzo/rust-testing-example/Cargo.toml
[INFO] started frobbing JohanLorenzo/rust-testing-example
[INFO] finished frobbing JohanLorenzo/rust-testing-example
[INFO] frobbed toml for JohanLorenzo/rust-testing-example written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/JohanLorenzo/rust-testing-example/Cargo.toml
[INFO] crate JohanLorenzo/rust-testing-example 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 JohanLorenzo/rust-testing-example 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/JohanLorenzo/rust-testing-example:/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] bceb898fdc01ce45b628db20473140c0c51bc682c969ab58580b8d45ad191250
[INFO] running `"docker" "start" "-a" "bceb898fdc01ce45b628db20473140c0c51bc682c969ab58580b8d45ad191250"`
[INFO] [stderr]    Compiling rust-testing-example v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `unused_function`
[INFO] [stderr]  --> src/main.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn unused_function() -> String {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.92s
[INFO] running `"docker" "inspect" "bceb898fdc01ce45b628db20473140c0c51bc682c969ab58580b8d45ad191250"`
[INFO] running `"docker" "rm" "-f" "bceb898fdc01ce45b628db20473140c0c51bc682c969ab58580b8d45ad191250"`
[INFO] [stdout] bceb898fdc01ce45b628db20473140c0c51bc682c969ab58580b8d45ad191250
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/JohanLorenzo/rust-testing-example:/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] 7103ada1315fa203ce77c88e58515a825d5ea581ca44789cbef876f8b513c80e
[INFO] running `"docker" "start" "-a" "7103ada1315fa203ce77c88e58515a825d5ea581ca44789cbef876f8b513c80e"`
[INFO] [stderr]    Compiling rust-testing-example v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `unused_function`
[INFO] [stderr]  --> src/main.rs:7:1
[INFO] [stderr]   |
[INFO] [stderr] 7 | fn unused_function() -> String {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.00s
[INFO] running `"docker" "inspect" "7103ada1315fa203ce77c88e58515a825d5ea581ca44789cbef876f8b513c80e"`
[INFO] running `"docker" "rm" "-f" "7103ada1315fa203ce77c88e58515a825d5ea581ca44789cbef876f8b513c80e"`
[INFO] [stdout] 7103ada1315fa203ce77c88e58515a825d5ea581ca44789cbef876f8b513c80e
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/JohanLorenzo/rust-testing-example:/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] 5e4d4cc6d3eb375d991841684c5d38f23bc2888ed15f997d8a1048fa4eea39b9
[INFO] running `"docker" "start" "-a" "5e4d4cc6d3eb375d991841684c5d38f23bc2888ed15f997d8a1048fa4eea39b9"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_testing_example-758a50e97ad2eeeb
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test_should_add_world ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "5e4d4cc6d3eb375d991841684c5d38f23bc2888ed15f997d8a1048fa4eea39b9"`
[INFO] running `"docker" "rm" "-f" "5e4d4cc6d3eb375d991841684c5d38f23bc2888ed15f997d8a1048fa4eea39b9"`
[INFO] [stdout] 5e4d4cc6d3eb375d991841684c5d38f23bc2888ed15f997d8a1048fa4eea39b9