[INFO] updating cached repository c4collins/rust-by-example
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/c4collins/rust-by-example
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/c4collins/rust-by-example" "work/ex/beta-1.38-1/sources/1.37.0/gh/c4collins/rust-by-example"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/c4collins/rust-by-example'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/c4collins/rust-by-example" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/c4collins/rust-by-example"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/c4collins/rust-by-example'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 93b426269e08f327892d00efd64e58e3c817f3d5
[INFO] sha for GitHub repo c4collins/rust-by-example: 93b426269e08f327892d00efd64e58e3c817f3d5
[INFO] validating manifest of c4collins/rust-by-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 c4collins/rust-by-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 c4collins/rust-by-example
[INFO] finished frobbing c4collins/rust-by-example
[INFO] frobbed toml for c4collins/rust-by-example written to work/ex/beta-1.38-1/sources/1.37.0/gh/c4collins/rust-by-example/Cargo.toml
[INFO] started frobbing c4collins/rust-by-example
[INFO] finished frobbing c4collins/rust-by-example
[INFO] frobbed toml for c4collins/rust-by-example written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/c4collins/rust-by-example/Cargo.toml
[INFO] crate c4collins/rust-by-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 c4collins/rust-by-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-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/c4collins/rust-by-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] a27f371755f7d03dfb1f994482fb747e63e3479a2b378c64d1d99add48d95a85
[INFO] running `"docker" "start" "-a" "a27f371755f7d03dfb1f994482fb747e63e3479a2b378c64d1d99add48d95a85"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling syn v0.15.39
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling typename_derive v0.1.3
[INFO] [stderr]    Compiling typename v0.1.1
[INFO] [stderr]    Compiling rust-by-example v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `section_subtitle`
[INFO] [stderr]   --> src/helpers.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub fn section_subtitle (title: 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 18.60s
[INFO] running `"docker" "inspect" "a27f371755f7d03dfb1f994482fb747e63e3479a2b378c64d1d99add48d95a85"`
[INFO] running `"docker" "rm" "-f" "a27f371755f7d03dfb1f994482fb747e63e3479a2b378c64d1d99add48d95a85"`
[INFO] [stdout] a27f371755f7d03dfb1f994482fb747e63e3479a2b378c64d1d99add48d95a85
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/c4collins/rust-by-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] e04060dad4777cb37379183ca50bcdadf2a0406e02bfa7f3b22e67a18b54921f
[INFO] running `"docker" "start" "-a" "e04060dad4777cb37379183ca50bcdadf2a0406e02bfa7f3b22e67a18b54921f"`
[INFO] [stderr]    Compiling rust-by-example v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `section_subtitle`
[INFO] [stderr]   --> src/helpers.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | pub fn section_subtitle (title: 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 0.98s
[INFO] running `"docker" "inspect" "e04060dad4777cb37379183ca50bcdadf2a0406e02bfa7f3b22e67a18b54921f"`
[INFO] running `"docker" "rm" "-f" "e04060dad4777cb37379183ca50bcdadf2a0406e02bfa7f3b22e67a18b54921f"`
[INFO] [stdout] e04060dad4777cb37379183ca50bcdadf2a0406e02bfa7f3b22e67a18b54921f
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/c4collins/rust-by-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] 0d7d395dd8fd076bd77c030d0a8435bb348fea4de2b956dda511a4220d444b51
[INFO] running `"docker" "start" "-a" "0d7d395dd8fd076bd77c030d0a8435bb348fea4de2b956dda511a4220d444b51"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rary-5473dae28902bda3
[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] [stderr]      Running /opt/crater/target/debug/deps/rust_by_example-e340c5b30830133e
[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] [stderr]    Doc-tests rary
[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" "0d7d395dd8fd076bd77c030d0a8435bb348fea4de2b956dda511a4220d444b51"`
[INFO] running `"docker" "rm" "-f" "0d7d395dd8fd076bd77c030d0a8435bb348fea4de2b956dda511a4220d444b51"`
[INFO] [stdout] 0d7d395dd8fd076bd77c030d0a8435bb348fea4de2b956dda511a4220d444b51