[INFO] updating cached repository volitilov/Rust_learn
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/volitilov/Rust_learn
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/volitilov/Rust_learn" "work/ex/beta-1.38-1/sources/1.37.0/gh/volitilov/Rust_learn"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/volitilov/Rust_learn'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/volitilov/Rust_learn" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/volitilov/Rust_learn"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/volitilov/Rust_learn'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 085d985a7a03552ab1105794a079a8e0bd9eb1a3
[INFO] sha for GitHub repo volitilov/Rust_learn: 085d985a7a03552ab1105794a079a8e0bd9eb1a3
[INFO] validating manifest of volitilov/Rust_learn 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 volitilov/Rust_learn 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 volitilov/Rust_learn
[INFO] finished frobbing volitilov/Rust_learn
[INFO] frobbed toml for volitilov/Rust_learn written to work/ex/beta-1.38-1/sources/1.37.0/gh/volitilov/Rust_learn/Cargo.toml
[INFO] started frobbing volitilov/Rust_learn
[INFO] finished frobbing volitilov/Rust_learn
[INFO] frobbed toml for volitilov/Rust_learn written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/volitilov/Rust_learn/Cargo.toml
[INFO] crate volitilov/Rust_learn 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 volitilov/Rust_learn 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-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/volitilov/Rust_learn:/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] 87b7b2795470de5d769264b6f4c810d1790409d6a12bc2e68a847087217b88b7
[INFO] running `"docker" "start" "-a" "87b7b2795470de5d769264b6f4c810d1790409d6a12bc2e68a847087217b88b7"`
[INFO] [stderr]    Compiling project v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `print_number`
[INFO] [stderr]   --> src/main.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn print_number(x: i64) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_sum`
[INFO] [stderr]   --> src/main.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | fn print_sum(x: i64, y: i64) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.67s
[INFO] running `"docker" "inspect" "87b7b2795470de5d769264b6f4c810d1790409d6a12bc2e68a847087217b88b7"`
[INFO] running `"docker" "rm" "-f" "87b7b2795470de5d769264b6f4c810d1790409d6a12bc2e68a847087217b88b7"`
[INFO] [stdout] 87b7b2795470de5d769264b6f4c810d1790409d6a12bc2e68a847087217b88b7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/volitilov/Rust_learn:/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] 4b4d48bf76c5bd0b0cbd4b9feb2d4e7095611ecfbcddb9b8507cb616ee6ad254
[INFO] running `"docker" "start" "-a" "4b4d48bf76c5bd0b0cbd4b9feb2d4e7095611ecfbcddb9b8507cb616ee6ad254"`
[INFO] [stderr]    Compiling project v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `print_number`
[INFO] [stderr]   --> src/main.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn print_number(x: i64) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `print_sum`
[INFO] [stderr]   --> src/main.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | fn print_sum(x: i64, y: i64) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.45s
[INFO] running `"docker" "inspect" "4b4d48bf76c5bd0b0cbd4b9feb2d4e7095611ecfbcddb9b8507cb616ee6ad254"`
[INFO] running `"docker" "rm" "-f" "4b4d48bf76c5bd0b0cbd4b9feb2d4e7095611ecfbcddb9b8507cb616ee6ad254"`
[INFO] [stdout] 4b4d48bf76c5bd0b0cbd4b9feb2d4e7095611ecfbcddb9b8507cb616ee6ad254
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/volitilov/Rust_learn:/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] 58fd26970a5903c02d50becbc75ebafdaffd7e7d2511010cadf0bf361b4e969f
[INFO] running `"docker" "start" "-a" "58fd26970a5903c02d50becbc75ebafdaffd7e7d2511010cadf0bf361b4e969f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/project-3672ef283f74fd59
[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" "58fd26970a5903c02d50becbc75ebafdaffd7e7d2511010cadf0bf361b4e969f"`
[INFO] running `"docker" "rm" "-f" "58fd26970a5903c02d50becbc75ebafdaffd7e7d2511010cadf0bf361b4e969f"`
[INFO] [stdout] 58fd26970a5903c02d50becbc75ebafdaffd7e7d2511010cadf0bf361b4e969f