[INFO] updating cached repository srenevey/ode-solvers
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/srenevey/ode-solvers
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/srenevey/ode-solvers" "work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/srenevey/ode-solvers"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/srenevey/ode-solvers'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/srenevey/ode-solvers" "work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/srenevey/ode-solvers"`
[INFO] [stderr] Cloning into 'work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/srenevey/ode-solvers'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0e1bd19b583cb92b1671e16eab245e2d5b9f08ac
[INFO] sha for GitHub repo srenevey/ode-solvers: 0e1bd19b583cb92b1671e16eab245e2d5b9f08ac
[INFO] validating manifest of srenevey/ode-solvers on toolchain master#c43d03a19f326f4a323569328cc501e86eb6d22e
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of srenevey/ode-solvers on toolchain try#75eff020d0923c035c2fe220db4a0465cd847048
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing srenevey/ode-solvers
[INFO] finished frobbing srenevey/ode-solvers
[INFO] frobbed toml for srenevey/ode-solvers written to work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/srenevey/ode-solvers/Cargo.toml
[INFO] started frobbing srenevey/ode-solvers
[INFO] finished frobbing srenevey/ode-solvers
[INFO] frobbed toml for srenevey/ode-solvers written to work/ex/pr-63565/sources/try#75eff020d0923c035c2fe220db4a0465cd847048/gh/srenevey/ode-solvers/Cargo.toml
[INFO] crate srenevey/ode-solvers already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+75eff020d0923c035c2fe220db4a0465cd847048-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking srenevey/ode-solvers against master#c43d03a19f326f4a323569328cc501e86eb6d22e for pr-63565
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63565/worker-7/master#c43d03a19f326f4a323569328cc501e86eb6d22e:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63565/sources/master#c43d03a19f326f4a323569328cc501e86eb6d22e/gh/srenevey/ode-solvers:/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=forbid" "-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" "+c43d03a19f326f4a323569328cc501e86eb6d22e-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] dfabfe2af6113810a6f3c34fa127c9837d7ba525cdc04b5921fc3f6816a0a3f4
[INFO] running `"docker" "start" "-a" "dfabfe2af6113810a6f3c34fa127c9837d7ba525cdc04b5921fc3f6816a0a3f4"`
[INFO] [stderr]     Checking approx v0.3.2
[INFO] [stderr]     Checking rand v0.6.5
[INFO] [stderr]     Checking alga v0.8.2
[INFO] [stderr]     Checking nalgebra v0.17.3
[INFO] [stderr]     Checking ode_solvers v0.3.0 (/opt/crater/workdir)
[INFO] [stderr] warning: field is never used: `num_stages`
[INFO] [stderr]    --> src/butcher_tableau.rs:102:5
[INFO] [stderr]     |
[INFO] [stderr] 102 |     num_stages: usize,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `num_stages`
[INFO] [stderr]    --> src/butcher_tableau.rs:418:5
[INFO] [stderr]     |
[INFO] [stderr] 418 |     pub fn num_stages(&self) -> usize {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `order`
[INFO] [stderr]    --> src/butcher_tableau.rs:423:5
[INFO] [stderr]     |
[INFO] [stderr] 423 |     pub fn order(&self) -> i32 {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `num_stages`
[INFO] [stderr]    --> src/butcher_tableau.rs:102:5
[INFO] [stderr]     |
[INFO] [stderr] 102 |     num_stages: usize,
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `num_stages`
[INFO] [stderr]    --> src/butcher_tableau.rs:418:5
[INFO] [stderr]     |
[INFO] [stderr] 418 |     pub fn num_stages(&self) -> usize {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `order`
[INFO] [stderr]    --> src/butcher_tableau.rs:423:5
[INFO] [stderr]     |
[INFO] [stderr] 423 |     pub fn order(&self) -> i32 {
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 38.62s
[INFO] running `"docker" "inspect" "dfabfe2af6113810a6f3c34fa127c9837d7ba525cdc04b5921fc3f6816a0a3f4"`
[INFO] running `"docker" "rm" "-f" "dfabfe2af6113810a6f3c34fa127c9837d7ba525cdc04b5921fc3f6816a0a3f4"`
[INFO] [stdout] dfabfe2af6113810a6f3c34fa127c9837d7ba525cdc04b5921fc3f6816a0a3f4