[INFO] updating cached repository Askaholic/rust-intro
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Askaholic/rust-intro
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Askaholic/rust-intro" "work/ex/beta-1.38-1/sources/1.37.0/gh/Askaholic/rust-intro"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Askaholic/rust-intro'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Askaholic/rust-intro" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Askaholic/rust-intro"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Askaholic/rust-intro'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 863aaad62137c038592c5392e56e8b015f301c74
[INFO] sha for GitHub repo Askaholic/rust-intro: 863aaad62137c038592c5392e56e8b015f301c74
[INFO] validating manifest of Askaholic/rust-intro 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 Askaholic/rust-intro 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 Askaholic/rust-intro
[INFO] finished frobbing Askaholic/rust-intro
[INFO] frobbed toml for Askaholic/rust-intro written to work/ex/beta-1.38-1/sources/1.37.0/gh/Askaholic/rust-intro/Cargo.toml
[INFO] started frobbing Askaholic/rust-intro
[INFO] finished frobbing Askaholic/rust-intro
[INFO] frobbed toml for Askaholic/rust-intro written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Askaholic/rust-intro/Cargo.toml
[INFO] crate Askaholic/rust-intro 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 Askaholic/rust-intro 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/Askaholic/rust-intro:/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] 09bda1dc007afded788d561e409ef538371c63527c3f6fcc5abb0186f89870cc
[INFO] running `"docker" "start" "-a" "09bda1dc007afded788d561e409ef538371c63527c3f6fcc5abb0186f89870cc"`
[INFO] [stderr]    Compiling hello_world v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `guess`
[INFO] [stderr]   --> src/guess.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub fn guess() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_guess`
[INFO] [stderr]   --> src/guess.rs:41:1
[INFO] [stderr]    |
[INFO] [stderr] 41 | fn get_guess() -> Result<i64, std::num::ParseIntError> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.96s
[INFO] running `"docker" "inspect" "09bda1dc007afded788d561e409ef538371c63527c3f6fcc5abb0186f89870cc"`
[INFO] running `"docker" "rm" "-f" "09bda1dc007afded788d561e409ef538371c63527c3f6fcc5abb0186f89870cc"`
[INFO] [stdout] 09bda1dc007afded788d561e409ef538371c63527c3f6fcc5abb0186f89870cc
[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/Askaholic/rust-intro:/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] 2edf27ff4950fb17ccbc948f9b4d04143ecdea55615a43912657058373dc2c5e
[INFO] running `"docker" "start" "-a" "2edf27ff4950fb17ccbc948f9b4d04143ecdea55615a43912657058373dc2c5e"`
[INFO] [stderr]    Compiling hello_world v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `guess`
[INFO] [stderr]   --> src/guess.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | pub fn guess() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `get_guess`
[INFO] [stderr]   --> src/guess.rs:41:1
[INFO] [stderr]    |
[INFO] [stderr] 41 | fn get_guess() -> Result<i64, std::num::ParseIntError> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.39s
[INFO] running `"docker" "inspect" "2edf27ff4950fb17ccbc948f9b4d04143ecdea55615a43912657058373dc2c5e"`
[INFO] running `"docker" "rm" "-f" "2edf27ff4950fb17ccbc948f9b4d04143ecdea55615a43912657058373dc2c5e"`
[INFO] [stdout] 2edf27ff4950fb17ccbc948f9b4d04143ecdea55615a43912657058373dc2c5e
[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/Askaholic/rust-intro:/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] f1804a1830d893526ef9790d13c29a5aee21735c97c408b5f7566cdd47ea4ca5
[INFO] running `"docker" "start" "-a" "f1804a1830d893526ef9790d13c29a5aee21735c97c408b5f7566cdd47ea4ca5"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/hello_world-c51a6207c80bc03a
[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" "f1804a1830d893526ef9790d13c29a5aee21735c97c408b5f7566cdd47ea4ca5"`
[INFO] running `"docker" "rm" "-f" "f1804a1830d893526ef9790d13c29a5aee21735c97c408b5f7566cdd47ea4ca5"`
[INFO] [stdout] f1804a1830d893526ef9790d13c29a5aee21735c97c408b5f7566cdd47ea4ca5