[INFO] updating cached repository iinux/rust_study
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/iinux/rust_study
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/iinux/rust_study" "work/ex/beta-1.38-1/sources/1.37.0/gh/iinux/rust_study"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/iinux/rust_study'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/iinux/rust_study" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/iinux/rust_study"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/iinux/rust_study'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 5267b2ab4d693f82ad06bfaf34e2f866b53e33ea
[INFO] sha for GitHub repo iinux/rust_study: 5267b2ab4d693f82ad06bfaf34e2f866b53e33ea
[INFO] validating manifest of iinux/rust_study 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 iinux/rust_study 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 iinux/rust_study
[INFO] finished frobbing iinux/rust_study
[INFO] frobbed toml for iinux/rust_study written to work/ex/beta-1.38-1/sources/1.37.0/gh/iinux/rust_study/Cargo.toml
[INFO] started frobbing iinux/rust_study
[INFO] finished frobbing iinux/rust_study
[INFO] frobbed toml for iinux/rust_study written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/iinux/rust_study/Cargo.toml
[INFO] crate iinux/rust_study 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 iinux/rust_study 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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/iinux/rust_study:/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] 56560292e4eb11bb490d75604a81eea1785cbfa115ce26419a16d432f1776c4b
[INFO] running `"docker" "start" "-a" "56560292e4eb11bb490d75604a81eea1785cbfa115ce26419a16d432f1776c4b"`
[INFO] [stderr]    Compiling rust_study v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `string_move`
[INFO] [stderr]   --> src/main.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | fn string_move() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `string_test`
[INFO] [stderr]   --> src/main.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | fn string_test() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tup_array`
[INFO] [stderr]   --> src/main.rs:35:1
[INFO] [stderr]    |
[INFO] [stderr] 35 | fn tup_array() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `another_function`
[INFO] [stderr]   --> src/main.rs:72:1
[INFO] [stderr]    |
[INFO] [stderr] 72 | fn another_function(x: i32) -> i32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `guess_number`
[INFO] [stderr]   --> src/main.rs:83:1
[INFO] [stderr]    |
[INFO] [stderr] 83 | fn guess_number() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.91s
[INFO] running `"docker" "inspect" "56560292e4eb11bb490d75604a81eea1785cbfa115ce26419a16d432f1776c4b"`
[INFO] running `"docker" "rm" "-f" "56560292e4eb11bb490d75604a81eea1785cbfa115ce26419a16d432f1776c4b"`
[INFO] [stdout] 56560292e4eb11bb490d75604a81eea1785cbfa115ce26419a16d432f1776c4b
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/iinux/rust_study:/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] f430061f6b15824a21beaddf077645551a5ffd8e3beff4dea7c6e29511fe9607
[INFO] running `"docker" "start" "-a" "f430061f6b15824a21beaddf077645551a5ffd8e3beff4dea7c6e29511fe9607"`
[INFO] [stderr]    Compiling rust_study v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function is never used: `string_move`
[INFO] [stderr]   --> src/main.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | fn string_move() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `string_test`
[INFO] [stderr]   --> src/main.rs:24:1
[INFO] [stderr]    |
[INFO] [stderr] 24 | fn string_test() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `tup_array`
[INFO] [stderr]   --> src/main.rs:35:1
[INFO] [stderr]    |
[INFO] [stderr] 35 | fn tup_array() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `another_function`
[INFO] [stderr]   --> src/main.rs:72:1
[INFO] [stderr]    |
[INFO] [stderr] 72 | fn another_function(x: i32) -> i32 {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `guess_number`
[INFO] [stderr]   --> src/main.rs:83:1
[INFO] [stderr]    |
[INFO] [stderr] 83 | fn guess_number() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.93s
[INFO] running `"docker" "inspect" "f430061f6b15824a21beaddf077645551a5ffd8e3beff4dea7c6e29511fe9607"`
[INFO] running `"docker" "rm" "-f" "f430061f6b15824a21beaddf077645551a5ffd8e3beff4dea7c6e29511fe9607"`
[INFO] [stdout] f430061f6b15824a21beaddf077645551a5ffd8e3beff4dea7c6e29511fe9607
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/iinux/rust_study:/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] a216a268e7a579d806439996bfe1569a0a9b9eab164c1755ed65371dcc8bbc40
[INFO] running `"docker" "start" "-a" "a216a268e7a579d806439996bfe1569a0a9b9eab164c1755ed65371dcc8bbc40"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/rust_study-75ff876c36bacb59
[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" "a216a268e7a579d806439996bfe1569a0a9b9eab164c1755ed65371dcc8bbc40"`
[INFO] running `"docker" "rm" "-f" "a216a268e7a579d806439996bfe1569a0a9b9eab164c1755ed65371dcc8bbc40"`
[INFO] [stdout] a216a268e7a579d806439996bfe1569a0a9b9eab164c1755ed65371dcc8bbc40