[INFO] updating cached repository irvingwashington/leaky_bucket
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/irvingwashington/leaky_bucket
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/irvingwashington/leaky_bucket" "work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/irvingwashington/leaky_bucket"`
[INFO] [stderr] Cloning into 'work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/irvingwashington/leaky_bucket'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/irvingwashington/leaky_bucket" "work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/irvingwashington/leaky_bucket"`
[INFO] [stderr] Cloning into 'work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/irvingwashington/leaky_bucket'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 46239661d6c1a941e1cd08f7b7b4ca93f8e89fd6
[INFO] sha for GitHub repo irvingwashington/leaky_bucket: 46239661d6c1a941e1cd08f7b7b4ca93f8e89fd6
[INFO] validating manifest of irvingwashington/leaky_bucket on toolchain master#9f06855064ed06a50c496577b21ca50f92a2e67d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of irvingwashington/leaky_bucket on toolchain try#d3301713b54af69ca9de941a8c6b0d8287dbd6df
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing irvingwashington/leaky_bucket
[INFO] finished frobbing irvingwashington/leaky_bucket
[INFO] frobbed toml for irvingwashington/leaky_bucket written to work/ex/pr-61874/sources/master#9f06855064ed06a50c496577b21ca50f92a2e67d/gh/irvingwashington/leaky_bucket/Cargo.toml
[INFO] started frobbing irvingwashington/leaky_bucket
[INFO] finished frobbing irvingwashington/leaky_bucket
[INFO] frobbed toml for irvingwashington/leaky_bucket written to work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/irvingwashington/leaky_bucket/Cargo.toml
[INFO] crate irvingwashington/leaky_bucket already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+9f06855064ed06a50c496577b21ca50f92a2e67d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache lock
[INFO] checking irvingwashington/leaky_bucket against try#d3301713b54af69ca9de941a8c6b0d8287dbd6df for pr-61874
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-61874/worker-4/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-61874/sources/try#d3301713b54af69ca9de941a8c6b0d8287dbd6df/gh/irvingwashington/leaky_bucket:/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" "+d3301713b54af69ca9de941a8c6b0d8287dbd6df-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] b00a2bc575f163f01cb5c4d24c6864bd93ae00cd276961567123257f39ee9fb3
[INFO] running `"docker" "start" "-a" "b00a2bc575f163f01cb5c4d24c6864bd93ae00cd276961567123257f39ee9fb3"`
[INFO] [stderr]     Checking serde v1.0.32
[INFO] [stderr]    Compiling serde_derive_internals v0.20.1
[INFO] [stderr]    Compiling serde_derive v1.0.32
[INFO] [stderr]     Checking bincode v1.0.0
[INFO] [stderr]     Checking leaky_bucket v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/main.rs:32:13
[INFO] [stderr]    |
[INFO] [stderr] 32 |         let mut stream = stream_result.unwrap();
[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/hash_storage.rs:35:25
[INFO] [stderr]    |
[INFO] [stderr] 35 |                     let mut priority_elements = self.elements.get_mut(&priority).unwrap();
[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/main.rs:32:13
[INFO] [stderr]    |
[INFO] [stderr] 32 |         let mut stream = stream_result.unwrap();
[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/hash_storage.rs:35:25
[INFO] [stderr]    |
[INFO] [stderr] 35 |                     let mut priority_elements = self.elements.get_mut(&priority).unwrap();
[INFO] [stderr]    |                         ----^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |                         |
[INFO] [stderr]    |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 16.98s
[INFO] running `"docker" "inspect" "b00a2bc575f163f01cb5c4d24c6864bd93ae00cd276961567123257f39ee9fb3"`
[INFO] running `"docker" "rm" "-f" "b00a2bc575f163f01cb5c4d24c6864bd93ae00cd276961567123257f39ee9fb3"`
[INFO] [stdout] b00a2bc575f163f01cb5c4d24c6864bd93ae00cd276961567123257f39ee9fb3