[INFO] updating cached repository tiuuuuPJ/antbook
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/tiuuuuPJ/antbook
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/tiuuuuPJ/antbook" "work/ex/beta-1.37-6/sources/1.36.0/gh/tiuuuuPJ/antbook"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/tiuuuuPJ/antbook'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/tiuuuuPJ/antbook" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/tiuuuuPJ/antbook"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/tiuuuuPJ/antbook'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 2ce9c4b9cffbd20d86b9d47971e58ec6b1418e08
[INFO] sha for GitHub repo tiuuuuPJ/antbook: 2ce9c4b9cffbd20d86b9d47971e58ec6b1418e08
[INFO] validating manifest of tiuuuuPJ/antbook on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of tiuuuuPJ/antbook on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing tiuuuuPJ/antbook
[INFO] finished frobbing tiuuuuPJ/antbook
[INFO] frobbed toml for tiuuuuPJ/antbook written to work/ex/beta-1.37-6/sources/1.36.0/gh/tiuuuuPJ/antbook/Cargo.toml
[INFO] started frobbing tiuuuuPJ/antbook
[INFO] finished frobbing tiuuuuPJ/antbook
[INFO] frobbed toml for tiuuuuPJ/antbook written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/tiuuuuPJ/antbook/Cargo.toml
[INFO] crate tiuuuuPJ/antbook already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing tiuuuuPJ/antbook against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/tiuuuuPJ/antbook:/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-2019-07-23" "build" "--frozen"`
[INFO] [stdout] fc69d5bbe8f23d3570ff0989bbf4463f95aab4f45fd1dda800fce8fb06c23847
[INFO] running `"docker" "start" "-a" "fc69d5bbe8f23d3570ff0989bbf4463f95aab4f45fd1dda800fce8fb06c23847"`
[INFO] [stderr]    Compiling antbook v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/chapter-1/2.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |                 let mut len = a[i] + a[j] + a[k];
[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: variable does not need to be mutable
[INFO] [stderr]   --> src/chapter-1/2.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |                 let mut max_a = cmp::max(cmp::max(a[i], a[j]), a[k]);
[INFO] [stderr]    |                     ----^^^^^
[INFO] [stderr]    |                     |
[INFO] [stderr]    |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/chapter-2/file_read_test.rs:10:26
[INFO] [stderr]    |
[INFO] [stderr] 10 | fn cat_file(stream: &mut BufRead) {
[INFO] [stderr]    |                          ^^^^^^^ help: use `dyn`: `dyn BufRead`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `DFS` should have a snake case name
[INFO] [stderr]   --> src/chapter-2/maze.rs:22:4
[INFO] [stderr]    |
[INFO] [stderr] 22 | fn DFS(map: &mut Vec<Vec<char>>, flag: &mut bool) -> bool {
[INFO] [stderr]    |    ^^^ help: convert the identifier to snake case: `dfs`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.60s
[INFO] running `"docker" "inspect" "fc69d5bbe8f23d3570ff0989bbf4463f95aab4f45fd1dda800fce8fb06c23847"`
[INFO] running `"docker" "rm" "-f" "fc69d5bbe8f23d3570ff0989bbf4463f95aab4f45fd1dda800fce8fb06c23847"`
[INFO] [stdout] fc69d5bbe8f23d3570ff0989bbf4463f95aab4f45fd1dda800fce8fb06c23847
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/tiuuuuPJ/antbook:/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-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 514d84aa455ceb6c13b84b34e4b3204ac4c0fd1e0800d8633ed1ee0df090cfe2
[INFO] running `"docker" "start" "-a" "514d84aa455ceb6c13b84b34e4b3204ac4c0fd1e0800d8633ed1ee0df090cfe2"`
[INFO] [stderr]    Compiling antbook v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: function `DFS` should have a snake case name
[INFO] [stderr]   --> src/chapter-2/maze.rs:22:4
[INFO] [stderr]    |
[INFO] [stderr] 22 | fn DFS(map: &mut Vec<Vec<char>>, flag: &mut bool) -> bool {
[INFO] [stderr]    |    ^^^ help: convert the identifier to snake case: `dfs`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/chapter-2/file_read_test.rs:10:26
[INFO] [stderr]    |
[INFO] [stderr] 10 | fn cat_file(stream: &mut BufRead) {
[INFO] [stderr]    |                          ^^^^^^^ help: use `dyn`: `dyn BufRead`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/chapter-1/2.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |                 let mut len = a[i] + a[j] + a[k];
[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: variable does not need to be mutable
[INFO] [stderr]   --> src/chapter-1/2.rs:20:9
[INFO] [stderr]    |
[INFO] [stderr] 20 |                 let mut max_a = cmp::max(cmp::max(a[i], a[j]), a[k]);
[INFO] [stderr]    |                     ----^^^^^
[INFO] [stderr]    |                     |
[INFO] [stderr]    |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.77s
[INFO] running `"docker" "inspect" "514d84aa455ceb6c13b84b34e4b3204ac4c0fd1e0800d8633ed1ee0df090cfe2"`
[INFO] running `"docker" "rm" "-f" "514d84aa455ceb6c13b84b34e4b3204ac4c0fd1e0800d8633ed1ee0df090cfe2"`
[INFO] [stdout] 514d84aa455ceb6c13b84b34e4b3204ac4c0fd1e0800d8633ed1ee0df090cfe2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-4/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/tiuuuuPJ/antbook:/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-2019-07-23" "test" "--frozen"`
[INFO] [stdout] 43da12b70167df5a421d254293859d756b407d87eb017240a280fa462ad81282
[INFO] running `"docker" "start" "-a" "43da12b70167df5a421d254293859d756b407d87eb017240a280fa462ad81282"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/1_1-0ae74770716524d2
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test check_answer ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/1_2-9b0aabc03a23fd37
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test answer_check ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/1_3-ecb26c94c56f765e
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test answer_check ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/2_1-5662e6acd20c7538
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test check_answer ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/2_2-a0f1a70985e9baa5
[INFO] [stderr]      Running /opt/crater/target/debug/deps/file_read_test-8980fdf5942195f9
[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] [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]      Running /opt/crater/target/debug/deps/greedy-9228baf4115d6205
[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]      Running /opt/crater/target/debug/deps/maze-4b82f5bbdcafddb5
[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" "43da12b70167df5a421d254293859d756b407d87eb017240a280fa462ad81282"`
[INFO] running `"docker" "rm" "-f" "43da12b70167df5a421d254293859d756b407d87eb017240a280fa462ad81282"`
[INFO] [stdout] 43da12b70167df5a421d254293859d756b407d87eb017240a280fa462ad81282