[INFO] updating cached repository alfanick/xxcalc-rs
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/alfanick/xxcalc-rs
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/alfanick/xxcalc-rs" "work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/alfanick/xxcalc-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/alfanick/xxcalc-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/alfanick/xxcalc-rs" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/alfanick/xxcalc-rs"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/alfanick/xxcalc-rs'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3cc7df7dc2348a75252b37878076c291adad4ba5
[INFO] sha for GitHub repo alfanick/xxcalc-rs: 3cc7df7dc2348a75252b37878076c291adad4ba5
[INFO] validating manifest of alfanick/xxcalc-rs 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 alfanick/xxcalc-rs 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 alfanick/xxcalc-rs
[INFO] finished frobbing alfanick/xxcalc-rs
[INFO] frobbed toml for alfanick/xxcalc-rs written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/alfanick/xxcalc-rs/Cargo.toml
[INFO] started frobbing alfanick/xxcalc-rs
[INFO] finished frobbing alfanick/xxcalc-rs
[INFO] frobbed toml for alfanick/xxcalc-rs written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/alfanick/xxcalc-rs/Cargo.toml
[INFO] crate alfanick/xxcalc-rs 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 alfanick/xxcalc-rs against try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-6/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/alfanick/xxcalc-rs:/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" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] b6d4551d5e953e6890c614269db537c08a05239ef573d77a323fb503a4be37fc
[INFO] running `"docker" "start" "-a" "b6d4551d5e953e6890c614269db537c08a05239ef573d77a323fb503a4be37fc"`
[INFO] [stderr]     Checking smallvec v0.3.1
[INFO] [stderr]     Checking xxcalc v0.2.1 (/opt/crater/workdir)
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]    --> src/tokenizer.rs:265:1
[INFO] [stderr]     |
[INFO] [stderr] 265 | / macro_rules! tokenize {
[INFO] [stderr] 266 | |   ($x:expr) => (Tokenizer::default().process($x).to_owned())
[INFO] [stderr] 267 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_macros)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]    --> src/tokenizer.rs:269:1
[INFO] [stderr]     |
[INFO] [stderr] 269 | / macro_rules! tokenize_ref {
[INFO] [stderr] 270 | |   ($x:expr) => (Tokenizer::default().process($x))
[INFO] [stderr] 271 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused macro definition
[INFO] [stderr]    --> src/tokenizer.rs:265:1
[INFO] [stderr]     |
[INFO] [stderr] 265 | / macro_rules! tokenize {
[INFO] [stderr] 266 | |   ($x:expr) => (Tokenizer::default().process($x).to_owned())
[INFO] [stderr] 267 | | }
[INFO] [stderr]     | |_^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_macros)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]    --> src/polynomial.rs:416:5
[INFO] [stderr]     |
[INFO] [stderr] 416 |     self + &other;
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]    --> src/polynomial.rs:500:5
[INFO] [stderr]     |
[INFO] [stderr] 500 |     self - &other;
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]    --> src/polynomial.rs:596:5
[INFO] [stderr]     |
[INFO] [stderr] 596 |     self * &other;
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::ops::Mul::mul` that must be used
[INFO] [stderr]    --> src/polynomial.rs:618:5
[INFO] [stderr]     |
[INFO] [stderr] 618 |     self.mul(other);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]    --> src/polynomial.rs:416:5
[INFO] [stderr]     |
[INFO] [stderr] 416 |     self + &other;
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_must_use)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]    --> src/polynomial.rs:500:5
[INFO] [stderr]     |
[INFO] [stderr] 500 |     self - &other;
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]    --> src/polynomial.rs:596:5
[INFO] [stderr]     |
[INFO] [stderr] 596 |     self * &other;
[INFO] [stderr]     |     ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::ops::Mul::mul` that must be used
[INFO] [stderr]    --> src/polynomial.rs:618:5
[INFO] [stderr]     |
[INFO] [stderr] 618 |     self.mul(other);
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.47s
[INFO] running `"docker" "inspect" "b6d4551d5e953e6890c614269db537c08a05239ef573d77a323fb503a4be37fc"`
[INFO] running `"docker" "rm" "-f" "b6d4551d5e953e6890c614269db537c08a05239ef573d77a323fb503a4be37fc"`
[INFO] [stdout] b6d4551d5e953e6890c614269db537c08a05239ef573d77a323fb503a4be37fc