[INFO] updating cached repository colemickens/euler-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/colemickens/euler-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/colemickens/euler-rust" "work/ex/beta-1.37-6/sources/1.36.0/gh/colemickens/euler-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/1.36.0/gh/colemickens/euler-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/colemickens/euler-rust" "work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/colemickens/euler-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/colemickens/euler-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 441b787ba2e0e5564f582f883e355782ece155e4
[INFO] sha for GitHub repo colemickens/euler-rust: 441b787ba2e0e5564f582f883e355782ece155e4
[INFO] validating manifest of colemickens/euler-rust on toolchain 1.36.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of colemickens/euler-rust on toolchain beta-2019-07-23
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing colemickens/euler-rust
[INFO] finished frobbing colemickens/euler-rust
[INFO] frobbed toml for colemickens/euler-rust written to work/ex/beta-1.37-6/sources/1.36.0/gh/colemickens/euler-rust/Cargo.toml
[INFO] started frobbing colemickens/euler-rust
[INFO] finished frobbing colemickens/euler-rust
[INFO] frobbed toml for colemickens/euler-rust written to work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/colemickens/euler-rust/Cargo.toml
[INFO] crate colemickens/euler-rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.37-6/sources/1.36.0/gh/colemickens/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[INFO] the lockfile is outdated, regenerating it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" "+1.36.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.36.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-07-23" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing colemickens/euler-rust against beta-2019-07-23 for beta-1.37-6
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/colemickens/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=warn" "-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" "+beta-2019-07-23" "build" "--frozen"`
[INFO] [stdout] 6cf9045c40a5844b95c95468694dfa9febf8394adaae55350627bb7be4cd6df2
[INFO] running `"docker" "start" "-a" "6cf9045c40a5844b95c95468694dfa9febf8394adaae55350627bb7be4cd6df2"`
[INFO] [stderr]    Compiling colemickens-euler-rust v0.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: type alias is never used: `Output`
[INFO] [stderr]  --> src/primes.rs:7:3
[INFO] [stderr]   |
[INFO] [stderr] 7 |   type Output = BigInt;
[INFO] [stderr]   |   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.01s
[INFO] running `"docker" "inspect" "6cf9045c40a5844b95c95468694dfa9febf8394adaae55350627bb7be4cd6df2"`
[INFO] running `"docker" "rm" "-f" "6cf9045c40a5844b95c95468694dfa9febf8394adaae55350627bb7be4cd6df2"`
[INFO] [stdout] 6cf9045c40a5844b95c95468694dfa9febf8394adaae55350627bb7be4cd6df2
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.37-6/worker-1/beta-2019-07-23:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.37-6/sources/beta-2019-07-23/gh/colemickens/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=warn" "-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" "+beta-2019-07-23" "test" "--frozen" "--no-run"`
[INFO] [stdout] 46af02d701ed6823b44240815fa901523a3ec023abaaf4cc2e6c2d65282cd5bb
[INFO] running `"docker" "start" "-a" "46af02d701ed6823b44240815fa901523a3ec023abaaf4cc2e6c2d65282cd5bb"`
[INFO] [stderr]    Compiling colemickens-euler-rust v0.0.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unknown lint: `unused_variable`
[INFO] [stderr]   --> tests/problem011.rs:66:9
[INFO] [stderr]    |
[INFO] [stderr] 66 | #[allow(unused_variable)]
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^ help: did you mean: `unused_variables`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unknown_lints)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unknown lint: `unused_variable`
[INFO] [stderr]   --> tests/problem011.rs:78:9
[INFO] [stderr]    |
[INFO] [stderr] 78 | #[allow(unused_variable)]
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^ help: did you mean: `unused_variables`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]   --> tests/problem011.rs:31:1
[INFO] [stderr]    |
[INFO] [stderr] 31 | #![feature(convert)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]   --> tests/problem006.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | #![feature(iter_arith)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]   --> tests/problem008.rs:31:1
[INFO] [stderr]    |
[INFO] [stderr] 31 | #![feature(convert)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]   --> tests/problem008.rs:32:1
[INFO] [stderr]    |
[INFO] [stderr] 32 | #![feature(iter_arith)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `colemickens-euler-rust`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: Could not compile `colemickens-euler-rust`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> tests/problem003.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | #![feature(iter_cmp)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `colemickens-euler-rust`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0593]: closure is expected to take 2 arguments, but it takes 1 argument
[INFO] [stderr]   --> tests/problem003.rs:19:20
[INFO] [stderr]    |
[INFO] [stderr] 19 |   *(factors.iter().max_by(|&x| x).unwrap())
[INFO] [stderr]    |                    ^^^^^^ ---- takes 1 argument
[INFO] [stderr]    |                    |
[INFO] [stderr]    |                    expected closure that takes 2 arguments
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0593.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `colemickens-euler-rust`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: unused import: `std::num`
[INFO] [stderr]   --> tests/problem005.rs:13:5
[INFO] [stderr]    |
[INFO] [stderr] 13 | use std::num;
[INFO] [stderr]    |     ^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> tests/problem005.rs:41:12
[INFO] [stderr]    |
[INFO] [stderr] 41 |   for n in (lower_limit..upper_limit) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the beta release channel
[INFO] [stderr]  --> tests/problem010.rs:9:1
[INFO] [stderr]   |
[INFO] [stderr] 9 | #![feature(iter_arith)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: type alias is never used: `Output`
[INFO] [stderr]  --> src/primes.rs:7:3
[INFO] [stderr]   |
[INFO] [stderr] 7 |   type Output = BigInt;
[INFO] [stderr]   |   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `colemickens-euler-rust`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "46af02d701ed6823b44240815fa901523a3ec023abaaf4cc2e6c2d65282cd5bb"`
[INFO] running `"docker" "rm" "-f" "46af02d701ed6823b44240815fa901523a3ec023abaaf4cc2e6c2d65282cd5bb"`
[INFO] [stdout] 46af02d701ed6823b44240815fa901523a3ec023abaaf4cc2e6c2d65282cd5bb