[INFO] updating cached repository adicatana/hello_rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/adicatana/hello_rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/adicatana/hello_rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/adicatana/hello_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/adicatana/hello_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/adicatana/hello_rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/adicatana/hello_rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/adicatana/hello_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] dcc5bfe6df09e1d5297eb0ca44fa4553e22db9af
[INFO] sha for GitHub repo adicatana/hello_rust: dcc5bfe6df09e1d5297eb0ca44fa4553e22db9af
[INFO] validating manifest of adicatana/hello_rust 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 adicatana/hello_rust 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 adicatana/hello_rust
[INFO] finished frobbing adicatana/hello_rust
[INFO] frobbed toml for adicatana/hello_rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/adicatana/hello_rust/Cargo.toml
[INFO] started frobbing adicatana/hello_rust
[INFO] finished frobbing adicatana/hello_rust
[INFO] frobbed toml for adicatana/hello_rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/adicatana/hello_rust/Cargo.toml
[INFO] crate adicatana/hello_rust 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 adicatana/hello_rust 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/adicatana/hello_rust:/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] 1665c0b62ea20363ea61723b73238ed64fdfe74f5508ea528f32555bf50298b7
[INFO] running `"docker" "start" "-a" "1665c0b62ea20363ea61723b73238ed64fdfe74f5508ea528f32555bf50298b7"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling hello_rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/guessing_game.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |         let mut guess = make_guess();
[INFO] [stderr]    |             ----^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: constant item is never used: `FILE_IN`
[INFO] [stderr]   --> src/main.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | const FILE_IN: &str = "text.in";
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `custom_read`
[INFO] [stderr]   --> src/main.rs:42:1
[INFO] [stderr]    |
[INFO] [stderr] 42 | fn custom_read() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Point`
[INFO] [stderr]   --> src/main.rs:70:1
[INFO] [stderr]    |
[INFO] [stderr] 70 | struct Point<T> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `x`
[INFO] [stderr]   --> src/main.rs:76:5
[INFO] [stderr]    |
[INFO] [stderr] 76 |     fn x(&self) -> &T {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.46s
[INFO] running `"docker" "inspect" "1665c0b62ea20363ea61723b73238ed64fdfe74f5508ea528f32555bf50298b7"`
[INFO] running `"docker" "rm" "-f" "1665c0b62ea20363ea61723b73238ed64fdfe74f5508ea528f32555bf50298b7"`
[INFO] [stdout] 1665c0b62ea20363ea61723b73238ed64fdfe74f5508ea528f32555bf50298b7
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/adicatana/hello_rust:/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] 80f84c377b90f1169569f8623c38d75ef976f1a436a3adfc65f4fcf274499120
[INFO] running `"docker" "start" "-a" "80f84c377b90f1169569f8623c38d75ef976f1a436a3adfc65f4fcf274499120"`
[INFO] [stderr]    Compiling hello_rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: constant item is never used: `FILE_IN`
[INFO] [stderr]   --> src/main.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | const FILE_IN: &str = "text.in";
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `custom_read`
[INFO] [stderr]   --> src/main.rs:42:1
[INFO] [stderr]    |
[INFO] [stderr] 42 | fn custom_read() {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Point`
[INFO] [stderr]   --> src/main.rs:70:1
[INFO] [stderr]    |
[INFO] [stderr] 70 | struct Point<T> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `x`
[INFO] [stderr]   --> src/main.rs:76:5
[INFO] [stderr]    |
[INFO] [stderr] 76 |     fn x(&self) -> &T {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/guessing_game.rs:15:13
[INFO] [stderr]    |
[INFO] [stderr] 15 |         let mut guess = make_guess();
[INFO] [stderr]    |             ----^^^^^
[INFO] [stderr]    |             |
[INFO] [stderr]    |             help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.19s
[INFO] running `"docker" "inspect" "80f84c377b90f1169569f8623c38d75ef976f1a436a3adfc65f4fcf274499120"`
[INFO] running `"docker" "rm" "-f" "80f84c377b90f1169569f8623c38d75ef976f1a436a3adfc65f4fcf274499120"`
[INFO] [stdout] 80f84c377b90f1169569f8623c38d75ef976f1a436a3adfc65f4fcf274499120
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/adicatana/hello_rust:/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] 9e3a24a0a6203638bf90718c427f847cb85795b6f40f5680cf04a27be38feaf7
[INFO] running `"docker" "start" "-a" "9e3a24a0a6203638bf90718c427f847cb85795b6f40f5680cf04a27be38feaf7"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/hello_rust-be8f637f4400a4fb
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test two_sum::tests::one_pair ... ok
[INFO] [stdout] test two_sum::tests::two_pairs ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/hello_rust-e1b93a1d87ab3713
[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 hello_rust
[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" "9e3a24a0a6203638bf90718c427f847cb85795b6f40f5680cf04a27be38feaf7"`
[INFO] running `"docker" "rm" "-f" "9e3a24a0a6203638bf90718c427f847cb85795b6f40f5680cf04a27be38feaf7"`
[INFO] [stdout] 9e3a24a0a6203638bf90718c427f847cb85795b6f40f5680cf04a27be38feaf7