[INFO] updating cached repository terakun/homology_group
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/terakun/homology_group
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/terakun/homology_group" "work/ex/beta-1.37-6/sources/1.36.0/gh/terakun/homology_group"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/terakun/homology_group'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/terakun/homology_group" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/terakun/homology_group"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/terakun/homology_group'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 77705ed0dcb59dad6137e2eb4ef1ee7d8a240f1c
[INFO] sha for GitHub repo terakun/homology_group: 77705ed0dcb59dad6137e2eb4ef1ee7d8a240f1c
[INFO] validating manifest of terakun/homology_group 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 terakun/homology_group 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 terakun/homology_group
[INFO] finished frobbing terakun/homology_group
[INFO] frobbed toml for terakun/homology_group written to work/ex/beta-1.37-6/sources/1.36.0/gh/terakun/homology_group/Cargo.toml
[INFO] started frobbing terakun/homology_group
[INFO] finished frobbing terakun/homology_group
[INFO] frobbed toml for terakun/homology_group written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/terakun/homology_group/Cargo.toml
[INFO] crate terakun/homology_group 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 terakun/homology_group 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-6/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/terakun/homology_group:/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] 5c85b4dfd0d245ed2f60b7482c521457f6b0d4930c427d6485a68aacb6826e0d
[INFO] running `"docker" "start" "-a" "5c85b4dfd0d245ed2f60b7482c521457f6b0d4930c427d6485a68aacb6826e0d"`
[INFO] [stderr]    Compiling rand v0.5.5
[INFO] [stderr]    Compiling num-complex v0.2.0
[INFO] [stderr]    Compiling approx v0.3.0
[INFO] [stderr]    Compiling num-bigint v0.2.0
[INFO] [stderr]    Compiling alga v0.7.2
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]    Compiling num v0.2.0
[INFO] [stderr]    Compiling nalgebra v0.16.4
[INFO] [stderr] warning[E0502]: cannot borrow `*self` as immutable because it is also borrowed as mutable
[INFO] [stderr]    --> /opt/crater/cargo-home/registry/src/github.com-1ecc6299db9ec823/nalgebra-0.16.4/src/base/cg.rs:292:44
[INFO] [stderr]     |
[INFO] [stderr] 292 |                 self[(j, i)] += shift[j] * self[(D::dim() - 1, i)];
[INFO] [stderr]     |                 ---------------------------^^^^-------------------
[INFO] [stderr]     |                 |                          |
[INFO] [stderr]     |                 |                          immutable borrow occurs here
[INFO] [stderr]     |                 mutable borrow occurs here
[INFO] [stderr]     |                 mutable borrow later used here
[INFO] [stderr]     |
[INFO] [stderr]     = warning: this error has been downgraded to a warning for backwards compatibility with previous releases
[INFO] [stderr]     = warning: this represents potential undefined behavior in your code and this warning will become a hard error in the future
[INFO] [stderr]     = note: for more information, try `rustc --explain E0729`
[INFO] [stderr] 
[INFO] [stderr]    Compiling homology_group v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `from_chain`
[INFO] [stderr]    --> src/main.rs:178:5
[INFO] [stderr]     |
[INFO] [stderr] 178 |     fn from_chain(chain: &Chain) -> Self {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 47.61s
[INFO] running `"docker" "inspect" "5c85b4dfd0d245ed2f60b7482c521457f6b0d4930c427d6485a68aacb6826e0d"`
[INFO] running `"docker" "rm" "-f" "5c85b4dfd0d245ed2f60b7482c521457f6b0d4930c427d6485a68aacb6826e0d"`
[INFO] [stdout] 5c85b4dfd0d245ed2f60b7482c521457f6b0d4930c427d6485a68aacb6826e0d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/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/terakun/homology_group:/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] c8ef0386a43b5ff5f064ea7196e0cda075fc1d53c2223e5a750ceaa9cda228a5
[INFO] running `"docker" "start" "-a" "c8ef0386a43b5ff5f064ea7196e0cda075fc1d53c2223e5a750ceaa9cda228a5"`
[INFO] [stderr]    Compiling homology_group v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: method is never used: `from_chain`
[INFO] [stderr]    --> src/main.rs:178:5
[INFO] [stderr]     |
[INFO] [stderr] 178 |     fn from_chain(chain: &Chain) -> Self {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.24s
[INFO] running `"docker" "inspect" "c8ef0386a43b5ff5f064ea7196e0cda075fc1d53c2223e5a750ceaa9cda228a5"`
[INFO] running `"docker" "rm" "-f" "c8ef0386a43b5ff5f064ea7196e0cda075fc1d53c2223e5a750ceaa9cda228a5"`
[INFO] [stdout] c8ef0386a43b5ff5f064ea7196e0cda075fc1d53c2223e5a750ceaa9cda228a5
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-6/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/terakun/homology_group:/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] 08e0815fdf7f8f321dfaa5c4ae83590ab7364b74f600a1fbf01bfcd4faf25c79
[INFO] running `"docker" "start" "-a" "08e0815fdf7f8f321dfaa5c4ae83590ab7364b74f600a1fbf01bfcd4faf25c79"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/homology_group-c2b6c562bf60db81
[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" "08e0815fdf7f8f321dfaa5c4ae83590ab7364b74f600a1fbf01bfcd4faf25c79"`
[INFO] running `"docker" "rm" "-f" "08e0815fdf7f8f321dfaa5c4ae83590ab7364b74f600a1fbf01bfcd4faf25c79"`
[INFO] [stdout] 08e0815fdf7f8f321dfaa5c4ae83590ab7364b74f600a1fbf01bfcd4faf25c79