[INFO] updating cached repository jajo-11/numeric_laplace
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/jajo-11/numeric_laplace
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/jajo-11/numeric_laplace" "work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/jajo-11/numeric_laplace"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/jajo-11/numeric_laplace'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/jajo-11/numeric_laplace" "work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/jajo-11/numeric_laplace"`
[INFO] [stderr] Cloning into 'work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/jajo-11/numeric_laplace'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e7e3dc51eb4750ff8ef401bc9433e6fb60e158ea
[INFO] sha for GitHub repo jajo-11/numeric_laplace: e7e3dc51eb4750ff8ef401bc9433e6fb60e158ea
[INFO] validating manifest of jajo-11/numeric_laplace on toolchain master#452087b4bf18cece2d52d7cd8c9147195e5404bf
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of jajo-11/numeric_laplace on toolchain try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing jajo-11/numeric_laplace
[INFO] finished frobbing jajo-11/numeric_laplace
[INFO] frobbed toml for jajo-11/numeric_laplace written to work/ex/pr-63247/sources/master#452087b4bf18cece2d52d7cd8c9147195e5404bf/gh/jajo-11/numeric_laplace/Cargo.toml
[INFO] started frobbing jajo-11/numeric_laplace
[INFO] finished frobbing jajo-11/numeric_laplace
[INFO] frobbed toml for jajo-11/numeric_laplace written to work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/jajo-11/numeric_laplace/Cargo.toml
[INFO] crate jajo-11/numeric_laplace already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+452087b4bf18cece2d52d7cd8c9147195e5404bf-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking jajo-11/numeric_laplace against try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab for pr-63247
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63247/worker-5/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63247/sources/try#757dacae0a9f1b46b3ab58a1f1232332e8fc7dab/gh/jajo-11/numeric_laplace:/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" "+757dacae0a9f1b46b3ab58a1f1232332e8fc7dab-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 4a9070bccb171ee1281e89a8c3f25a59b4bc2f09d92e0584ca0d30f1988d1b3d
[INFO] running `"docker" "start" "-a" "4a9070bccb171ee1281e89a8c3f25a59b4bc2f09d92e0584ca0d30f1988d1b3d"`
[INFO] [stderr]     Checking rand_core v0.2.0
[INFO] [stderr]     Checking crossbeam-utils v0.4.0
[INFO] [stderr]     Checking rand v0.5.0
[INFO] [stderr]     Checking numeric_laplace v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:150:21
[INFO] [stderr]     |
[INFO] [stderr] 150 |                 let mut delta = self.nodes[i] - new_value;
[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/lib.rs:179:21
[INFO] [stderr]     |
[INFO] [stderr] 179 |                 let mut delta = self.nodes[j] - new_value;
[INFO] [stderr]     |                     ----^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/thread_pool.rs:36:33
[INFO] [stderr]    |
[INFO] [stderr] 36 |                             let mut delta = nodes[i] - new_value;
[INFO] [stderr]    |                                 ----^^^^^
[INFO] [stderr]    |                                 |
[INFO] [stderr]    |                                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:150:21
[INFO] [stderr]     |
[INFO] [stderr] 150 |                 let mut delta = self.nodes[i] - new_value;
[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/lib.rs:179:21
[INFO] [stderr]     |
[INFO] [stderr] 179 |                 let mut delta = self.nodes[j] - new_value;
[INFO] [stderr]     |                     ----^^^^^
[INFO] [stderr]     |                     |
[INFO] [stderr]     |                     help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/thread_pool.rs:36:33
[INFO] [stderr]    |
[INFO] [stderr] 36 |                             let mut delta = nodes[i] - new_value;
[INFO] [stderr]    |                                 ----^^^^^
[INFO] [stderr]    |                                 |
[INFO] [stderr]    |                                 help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.60s
[INFO] running `"docker" "inspect" "4a9070bccb171ee1281e89a8c3f25a59b4bc2f09d92e0584ca0d30f1988d1b3d"`
[INFO] running `"docker" "rm" "-f" "4a9070bccb171ee1281e89a8c3f25a59b4bc2f09d92e0584ca0d30f1988d1b3d"`
[INFO] [stdout] 4a9070bccb171ee1281e89a8c3f25a59b4bc2f09d92e0584ca0d30f1988d1b3d