[INFO] updating cached repository beatmadsen/chess
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/beatmadsen/chess
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/beatmadsen/chess" "work/ex/beta-1.37-6/sources/1.36.0/gh/beatmadsen/chess"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/beatmadsen/chess'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/beatmadsen/chess" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/beatmadsen/chess"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/beatmadsen/chess'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e4bd1f56a7ea4da6b7ea9f773601463b3ad9e610
[INFO] sha for GitHub repo beatmadsen/chess: e4bd1f56a7ea4da6b7ea9f773601463b3ad9e610
[INFO] validating manifest of beatmadsen/chess 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 beatmadsen/chess 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 beatmadsen/chess
[INFO] finished frobbing beatmadsen/chess
[INFO] frobbed toml for beatmadsen/chess written to work/ex/beta-1.37-6/sources/1.36.0/gh/beatmadsen/chess/Cargo.toml
[INFO] started frobbing beatmadsen/chess
[INFO] finished frobbing beatmadsen/chess
[INFO] frobbed toml for beatmadsen/chess written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/beatmadsen/chess/Cargo.toml
[INFO] crate beatmadsen/chess 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 beatmadsen/chess against 1.36.0 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/beatmadsen/chess:/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" "+1.36.0" "build" "--frozen"`
[INFO] [stdout] 210b415a2710ef043cfd6bce1cd9e1d09c657721d697b61066b52ef54ecca109
[INFO] running `"docker" "start" "-a" "210b415a2710ef043cfd6bce1cd9e1d09c657721d697b61066b52ef54ecca109"`
[INFO] [stderr]    Compiling chess v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `Pawn`
[INFO] [stderr]   --> src/piece.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub struct Pawn {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Queen`
[INFO] [stderr]   --> src/piece.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub struct Queen {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `King`
[INFO] [stderr]   --> src/piece.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub struct King {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Knight`
[INFO] [stderr]   --> src/piece.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub struct Knight {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Rook`
[INFO] [stderr]   --> src/piece.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | pub struct Rook {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Square`
[INFO] [stderr]  --> src/square.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub struct Square {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `legal_moves`
[INFO] [stderr]   --> src/square.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn legal_moves(&self) -> Vec<(Name, Name)> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Position`
[INFO] [stderr]   --> src/square.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub struct Position {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `legal_moves`
[INFO] [stderr]   --> src/square.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn legal_moves(&self) -> Vec<(Name, Name)> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.86s
[INFO] running `"docker" "inspect" "210b415a2710ef043cfd6bce1cd9e1d09c657721d697b61066b52ef54ecca109"`
[INFO] running `"docker" "rm" "-f" "210b415a2710ef043cfd6bce1cd9e1d09c657721d697b61066b52ef54ecca109"`
[INFO] [stdout] 210b415a2710ef043cfd6bce1cd9e1d09c657721d697b61066b52ef54ecca109
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/beatmadsen/chess:/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" "+1.36.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 01e4c9e1aa92521a06e2b39da87a852f9614d1ccd23b7efaded1b4d5f96199ab
[INFO] running `"docker" "start" "-a" "01e4c9e1aa92521a06e2b39da87a852f9614d1ccd23b7efaded1b4d5f96199ab"`
[INFO] [stderr]    Compiling chess v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `Pawn`
[INFO] [stderr]   --> src/piece.rs:16:1
[INFO] [stderr]    |
[INFO] [stderr] 16 | pub struct Pawn {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Queen`
[INFO] [stderr]   --> src/piece.rs:17:1
[INFO] [stderr]    |
[INFO] [stderr] 17 | pub struct Queen {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `King`
[INFO] [stderr]   --> src/piece.rs:18:1
[INFO] [stderr]    |
[INFO] [stderr] 18 | pub struct King {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Knight`
[INFO] [stderr]   --> src/piece.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub struct Knight {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Rook`
[INFO] [stderr]   --> src/piece.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | pub struct Rook {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Square`
[INFO] [stderr]  --> src/square.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub struct Square {
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `legal_moves`
[INFO] [stderr]   --> src/square.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 |     pub fn legal_moves(&self) -> Vec<(Name, Name)> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Position`
[INFO] [stderr]   --> src/square.rs:19:1
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub struct Position {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `legal_moves`
[INFO] [stderr]   --> src/square.rs:24:5
[INFO] [stderr]    |
[INFO] [stderr] 24 |     pub fn legal_moves(&self) -> Vec<(Name, Name)> {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.46s
[INFO] running `"docker" "inspect" "01e4c9e1aa92521a06e2b39da87a852f9614d1ccd23b7efaded1b4d5f96199ab"`
[INFO] running `"docker" "rm" "-f" "01e4c9e1aa92521a06e2b39da87a852f9614d1ccd23b7efaded1b4d5f96199ab"`
[INFO] [stdout] 01e4c9e1aa92521a06e2b39da87a852f9614d1ccd23b7efaded1b4d5f96199ab
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-5/1.36.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/beatmadsen/chess:/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" "+1.36.0" "test" "--frozen"`
[INFO] [stdout] e5309e1d16ac2d6c74d5b9a76a05454f0d00043f5e5134a6281f9691a6d6ea88
[INFO] running `"docker" "start" "-a" "e5309e1d16ac2d6c74d5b9a76a05454f0d00043f5e5134a6281f9691a6d6ea88"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/chess-47322cb97acd0a34
[INFO] [stdout] 
[INFO] [stdout] running 14 tests
[INFO] [stdout] test name::tests::a1_collects_correct_east_neighbours ... ok
[INFO] [stdout] test name::tests::a3_collects_correct_south_west_neighbours ... ok
[INFO] [stdout] test name::tests::a1_has_no_south_west_neighbour ... ok
[INFO] [stdout] test name::tests::a8_has_no_north_west_neighbour ... ok
[INFO] [stdout] test name::tests::b2_has_correct_south_west_neighbour ... ok
[INFO] [stdout] test name::tests::b7_has_correct_north_west_neighbour ... ok
[INFO] [stdout] test name::tests::d4_has_correct_east_neighbour ... ok
[INFO] [stdout] test name::tests::d4_has_correct_south_neighbour ... ok
[INFO] [stdout] test name::tests::d4_has_correct_west_neighbour ... ok
[INFO] [stdout] test name::tests::h1_has_no_south_east_neighbour ... ok
[INFO] [stdout] test name::tests::g2_has_correct_south_east_neighbour ... ok
[INFO] [stdout] test name::tests::h8_has_no_north_east_neighbour ... ok
[INFO] [stdout] test name::tests::g7_has_correct_north_east_neighbour ... ok
[INFO] [stdout] test name::tests::d4_has_correct_north_neighbour ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 14 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "e5309e1d16ac2d6c74d5b9a76a05454f0d00043f5e5134a6281f9691a6d6ea88"`
[INFO] running `"docker" "rm" "-f" "e5309e1d16ac2d6c74d5b9a76a05454f0d00043f5e5134a6281f9691a6d6ea88"`
[INFO] [stdout] e5309e1d16ac2d6c74d5b9a76a05454f0d00043f5e5134a6281f9691a6d6ea88