[INFO] updating cached repository tawashichan/rust_practice
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tawashichan/rust_practice
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tawashichan/rust_practice" "work/ex/beta-1.38-1/sources/1.37.0/gh/tawashichan/rust_practice"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/tawashichan/rust_practice'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tawashichan/rust_practice" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tawashichan/rust_practice"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tawashichan/rust_practice'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 992c5786d87cf1c4f63638deb3072ca615053dfe
[INFO] sha for GitHub repo tawashichan/rust_practice: 992c5786d87cf1c4f63638deb3072ca615053dfe
[INFO] validating manifest of tawashichan/rust_practice 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 tawashichan/rust_practice 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 tawashichan/rust_practice
[INFO] finished frobbing tawashichan/rust_practice
[INFO] frobbed toml for tawashichan/rust_practice written to work/ex/beta-1.38-1/sources/1.37.0/gh/tawashichan/rust_practice/Cargo.toml
[INFO] started frobbing tawashichan/rust_practice
[INFO] finished frobbing tawashichan/rust_practice
[INFO] frobbed toml for tawashichan/rust_practice written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tawashichan/rust_practice/Cargo.toml
[INFO] crate tawashichan/rust_practice 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 tawashichan/rust_practice against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tawashichan/rust_practice:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] f9f6d987d48afa6c05be7e341deec5241e3936509a91d1c3d5b4312090242b93
[INFO] running `"docker" "start" "-a" "f9f6d987d48afa6c05be7e341deec5241e3936509a91d1c3d5b4312090242b93"`
[INFO] [stderr]    Compiling t_lib v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `p`
[INFO] [stderr]   --> src/main.rs:28:22
[INFO] [stderr]    |
[INFO] [stderr] 28 |                 Some(p) => {
[INFO] [stderr]    |                      ^ help: consider prefixing with an underscore: `_p`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `from`
[INFO] [stderr]   --> src/main.rs:51:17
[INFO] [stderr]    |
[INFO] [stderr] 51 | fn reachable<T>(from: &T, to: &T) -> bool {
[INFO] [stderr]    |                 ^^^^ help: consider prefixing with an underscore: `_from`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `to`
[INFO] [stderr]   --> src/main.rs:51:27
[INFO] [stderr]    |
[INFO] [stderr] 51 | fn reachable<T>(from: &T, to: &T) -> bool {
[INFO] [stderr]    |                           ^^ help: consider prefixing with an underscore: `_to`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p`
[INFO] [stderr]   --> src/main.rs:72:22
[INFO] [stderr]    |
[INFO] [stderr] 72 |                 Some(p) => continue,
[INFO] [stderr]    |                      ^ help: consider prefixing with an underscore: `_p`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p`
[INFO] [stderr]   --> src/main.rs:99:18
[INFO] [stderr]    |
[INFO] [stderr] 99 |             Some(p) => {
[INFO] [stderr]    |                  ^ help: consider prefixing with an underscore: `_p`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p`
[INFO] [stderr]    --> src/main.rs:124:18
[INFO] [stderr]     |
[INFO] [stderr] 124 |             Some(p) => {
[INFO] [stderr]     |                  ^ help: consider prefixing with an underscore: `_p`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `bfs`
[INFO] [stderr]   --> src/main.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | fn bfs(start: usize, goal: usize, m: Vec<Vec<usize>>) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reachable`
[INFO] [stderr]   --> src/main.rs:51:1
[INFO] [stderr]    |
[INFO] [stderr] 51 | fn reachable<T>(from: &T, to: &T) -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `dfs`
[INFO] [stderr]   --> src/main.rs:94:1
[INFO] [stderr]    |
[INFO] [stderr] 94 | fn dfs(start: usize, goal: usize, current: usize, current_path: Vec<usize>, m: &Vec<Vec<usize>>) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.15s
[INFO] running `"docker" "inspect" "f9f6d987d48afa6c05be7e341deec5241e3936509a91d1c3d5b4312090242b93"`
[INFO] running `"docker" "rm" "-f" "f9f6d987d48afa6c05be7e341deec5241e3936509a91d1c3d5b4312090242b93"`
[INFO] [stdout] f9f6d987d48afa6c05be7e341deec5241e3936509a91d1c3d5b4312090242b93
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tawashichan/rust_practice:/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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 3988275df4f65bc43977957824b2a6769a06dc2b0dbfb1243496f9f9f506d961
[INFO] running `"docker" "start" "-a" "3988275df4f65bc43977957824b2a6769a06dc2b0dbfb1243496f9f9f506d961"`
[INFO] [stderr]    Compiling t_lib v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `p`
[INFO] [stderr]   --> src/main.rs:28:22
[INFO] [stderr]    |
[INFO] [stderr] 28 |                 Some(p) => {
[INFO] [stderr]    |                      ^ help: consider prefixing with an underscore: `_p`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `from`
[INFO] [stderr]   --> src/main.rs:51:17
[INFO] [stderr]    |
[INFO] [stderr] 51 | fn reachable<T>(from: &T, to: &T) -> bool {
[INFO] [stderr]    |                 ^^^^ help: consider prefixing with an underscore: `_from`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `to`
[INFO] [stderr]   --> src/main.rs:51:27
[INFO] [stderr]    |
[INFO] [stderr] 51 | fn reachable<T>(from: &T, to: &T) -> bool {
[INFO] [stderr]    |                           ^^ help: consider prefixing with an underscore: `_to`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p`
[INFO] [stderr]   --> src/main.rs:72:22
[INFO] [stderr]    |
[INFO] [stderr] 72 |                 Some(p) => continue,
[INFO] [stderr]    |                      ^ help: consider prefixing with an underscore: `_p`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p`
[INFO] [stderr]   --> src/main.rs:99:18
[INFO] [stderr]    |
[INFO] [stderr] 99 |             Some(p) => {
[INFO] [stderr]    |                  ^ help: consider prefixing with an underscore: `_p`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `p`
[INFO] [stderr]    --> src/main.rs:124:18
[INFO] [stderr]     |
[INFO] [stderr] 124 |             Some(p) => {
[INFO] [stderr]     |                  ^ help: consider prefixing with an underscore: `_p`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `bfs`
[INFO] [stderr]   --> src/main.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | fn bfs(start: usize, goal: usize, m: Vec<Vec<usize>>) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `reachable`
[INFO] [stderr]   --> src/main.rs:51:1
[INFO] [stderr]    |
[INFO] [stderr] 51 | fn reachable<T>(from: &T, to: &T) -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `dfs`
[INFO] [stderr]   --> src/main.rs:94:1
[INFO] [stderr]    |
[INFO] [stderr] 94 | fn dfs(start: usize, goal: usize, current: usize, current_path: Vec<usize>, m: &Vec<Vec<usize>>) {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.95s
[INFO] running `"docker" "inspect" "3988275df4f65bc43977957824b2a6769a06dc2b0dbfb1243496f9f9f506d961"`
[INFO] running `"docker" "rm" "-f" "3988275df4f65bc43977957824b2a6769a06dc2b0dbfb1243496f9f9f506d961"`
[INFO] [stdout] 3988275df4f65bc43977957824b2a6769a06dc2b0dbfb1243496f9f9f506d961
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/tawashichan/rust_practice:/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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] f98ba62ba9038a76d2885af3c7ad6479ea69225bc6f7757f5717e9006008b70f
[INFO] running `"docker" "start" "-a" "f98ba62ba9038a76d2885af3c7ad6479ea69225bc6f7757f5717e9006008b70f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/t_lib-02c37aff54aab4a4
[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" "f98ba62ba9038a76d2885af3c7ad6479ea69225bc6f7757f5717e9006008b70f"`
[INFO] running `"docker" "rm" "-f" "f98ba62ba9038a76d2885af3c7ad6479ea69225bc6f7757f5717e9006008b70f"`
[INFO] [stdout] f98ba62ba9038a76d2885af3c7ad6479ea69225bc6f7757f5717e9006008b70f