[INFO] updating cached repository hon/study_rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/hon/study_rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/hon/study_rust" "work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/hon/study_rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/hon/study_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/hon/study_rust" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/hon/study_rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/hon/study_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] fd7f5c6e1dc451214c9990f6c839ac755c1709fb
[INFO] sha for GitHub repo hon/study_rust: fd7f5c6e1dc451214c9990f6c839ac755c1709fb
[INFO] validating manifest of hon/study_rust on toolchain master#0f88167f89fffe321590c5148f21b7d51d44388d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of hon/study_rust on toolchain try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing hon/study_rust
[INFO] finished frobbing hon/study_rust
[INFO] frobbed toml for hon/study_rust written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/hon/study_rust/Cargo.toml
[INFO] started frobbing hon/study_rust
[INFO] finished frobbing hon/study_rust
[INFO] frobbed toml for hon/study_rust written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/hon/study_rust/Cargo.toml
[INFO] crate hon/study_rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking hon/study_rust against master#0f88167f89fffe321590c5148f21b7d51d44388d for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-5/master#0f88167f89fffe321590c5148f21b7d51d44388d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/hon/study_rust:/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" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 6af0e637a65cddbba15a05b4d30fa977dcc0ccbc9a9cf0c5382bd4aca1496338
[INFO] running `"docker" "start" "-a" "6af0e637a65cddbba15a05b4d30fa977dcc0ccbc9a9cf0c5382bd4aca1496338"`
[INFO] [stderr]     Checking study_rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `consume`
[INFO] [stderr]   --> src/s_closure/mod.rs:61:9
[INFO] [stderr]    |
[INFO] [stderr] 61 |     let consume = || {
[INFO] [stderr]    |         ^^^^^^^ help: consider prefixing with an underscore: `_consume`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `x` is never read
[INFO] [stderr]  --> src/s_mutability/mod.rs:9:13
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let mut x = 5;
[INFO] [stderr]   |             ^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]   = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `consume`
[INFO] [stderr]   --> src/s_closure/mod.rs:61:9
[INFO] [stderr]    |
[INFO] [stderr] 61 |     let consume = || {
[INFO] [stderr]    |         ^^^^^^^ help: consider prefixing with an underscore: `_consume`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `x` is never read
[INFO] [stderr]  --> src/s_mutability/mod.rs:9:13
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let mut x = 5;
[INFO] [stderr]   |             ^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]   = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.92s
[INFO] running `"docker" "inspect" "6af0e637a65cddbba15a05b4d30fa977dcc0ccbc9a9cf0c5382bd4aca1496338"`
[INFO] running `"docker" "rm" "-f" "6af0e637a65cddbba15a05b4d30fa977dcc0ccbc9a9cf0c5382bd4aca1496338"`
[INFO] [stdout] 6af0e637a65cddbba15a05b4d30fa977dcc0ccbc9a9cf0c5382bd4aca1496338