[INFO] updating cached repository nettok/euler-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/nettok/euler-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/nettok/euler-rust" "work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/nettok/euler-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/nettok/euler-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/nettok/euler-rust" "work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/nettok/euler-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/nettok/euler-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 8deb662b1bf6f2ea4901b7c6f78b8d21921b1c95
[INFO] sha for GitHub repo nettok/euler-rust: 8deb662b1bf6f2ea4901b7c6f78b8d21921b1c95
[INFO] validating manifest of nettok/euler-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 nettok/euler-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 nettok/euler-rust
[INFO] finished frobbing nettok/euler-rust
[INFO] frobbed toml for nettok/euler-rust written to work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/nettok/euler-rust/Cargo.toml
[INFO] started frobbing nettok/euler-rust
[INFO] finished frobbing nettok/euler-rust
[INFO] frobbed toml for nettok/euler-rust written to work/ex/pr-58948/sources/try#a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b/gh/nettok/euler-rust/Cargo.toml
[INFO] crate nettok/euler-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] [stderr] error: the lock file /mnt/big/crater/work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/nettok/euler-rust/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] the lockfile is outdated, regenerating it
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0f88167f89fffe321590c5148f21b7d51d44388d-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+a829e31f924ec11e400e8d0c2fd2c4bb8937ae6b-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[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 nettok/euler-rust against master#0f88167f89fffe321590c5148f21b7d51d44388d for pr-58948
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58948/worker-6/master#0f88167f89fffe321590c5148f21b7d51d44388d:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58948/sources/master#0f88167f89fffe321590c5148f21b7d51d44388d/gh/nettok/euler-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] f11395e4ef0a4b155492dd5828b0c3f71b1e876d938f38ba8941b175c91b8266
[INFO] running `"docker" "start" "-a" "f11395e4ef0a4b155492dd5828b0c3f71b1e876d938f38ba8941b175c91b8266"`
[INFO] [stderr]     Checking euler-rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: struct is never constructed: `Fibonacci`
[INFO] [stderr]   --> src/p002.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 |     pub struct Fibonacci {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `new`
[INFO] [stderr]   --> src/p002.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |         pub fn new() -> Fibonacci {
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `solve`
[INFO] [stderr]   --> src/p002.rs:38:1
[INFO] [stderr]    |
[INFO] [stderr] 38 | fn solve(below: usize) -> usize {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gcd`
[INFO] [stderr]   --> src/p003.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | fn gcd(mut a: usize, mut b: usize) -> usize {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `is_prime`
[INFO] [stderr]   --> src/p003.rs:26:1
[INFO] [stderr]    |
[INFO] [stderr] 26 | fn is_prime(n: usize) -> bool {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `core` has been stable since 1.6.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(core)]
[INFO] [stderr]   |            ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(stable_features)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `core` has been stable since 1.6.0 and no longer requires an attribute to enable
[INFO] [stderr]  --> src/main.rs:1:12
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(core)]
[INFO] [stderr]   |            ^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(stable_features)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.87s
[INFO] running `"docker" "inspect" "f11395e4ef0a4b155492dd5828b0c3f71b1e876d938f38ba8941b175c91b8266"`
[INFO] running `"docker" "rm" "-f" "f11395e4ef0a4b155492dd5828b0c3f71b1e876d938f38ba8941b175c91b8266"`
[INFO] [stdout] f11395e4ef0a4b155492dd5828b0c3f71b1e876d938f38ba8941b175c91b8266