[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-1.38-1/sources/1.37.0/gh/colemickens/euler-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/colemickens/euler-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/colemickens/euler-rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/colemickens/euler-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of colemickens/euler-rust on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "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-1.38-1/sources/1.37.0/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-1.38-1/sources/beta-2019-08-13/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" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] error: the lock file /mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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[INFO] the lockfile is outdated, regenerating it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" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing colemickens/euler-rust against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 151ae6acab1fd4cc4a01763176bd96aa33ea49d417d9162008231b958580994d
[INFO] running `"docker" "start" "-a" "151ae6acab1fd4cc4a01763176bd96aa33ea49d417d9162008231b958580994d"`
[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 2.00s
[INFO] running `"docker" "inspect" "151ae6acab1fd4cc4a01763176bd96aa33ea49d417d9162008231b958580994d"`
[INFO] running `"docker" "rm" "-f" "151ae6acab1fd4cc4a01763176bd96aa33ea49d417d9162008231b958580994d"`
[INFO] [stdout] 151ae6acab1fd4cc4a01763176bd96aa33ea49d417d9162008231b958580994d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-1/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/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-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 854d09dfce17bab9ea61020fbe25e74a86688bb7ae40d81429d8a7d8a9eefb7b
[INFO] running `"docker" "start" "-a" "854d09dfce17bab9ea61020fbe25e74a86688bb7ae40d81429d8a7d8a9eefb7b"`
[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] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> tests/problem004.rs:11:12
[INFO] [stderr]    |
[INFO] [stderr] 11 |   for i in (0u32..num_digits/2) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> tests/problem004.rs:25:12
[INFO] [stderr]    |
[INFO] [stderr] 25 |   for x in (1u64..upper_bound) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> tests/problem004.rs:26:14
[INFO] [stderr]    |
[INFO] [stderr] 26 |     for y in (1u64..x) {
[INFO] [stderr]    |              ^^^^^^^^^ help: remove these parentheses
[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[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] 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] 
[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] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> tests/problem009.rs:18:12
[INFO] [stderr]    |
[INFO] [stderr] 18 |   for a in (0u64..target) {
[INFO] [stderr]    |            ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around `for` head expression
[INFO] [stderr]   --> tests/problem009.rs:19:14
[INFO] [stderr]    |
[INFO] [stderr] 19 |     for b in (0u64..a) {
[INFO] [stderr]    |              ^^^^^^^^^ help: remove these parentheses
[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[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]   --> tests/problem012.rs:42:1
[INFO] [stderr]    |
[INFO] [stderr] 42 | #![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: 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" "854d09dfce17bab9ea61020fbe25e74a86688bb7ae40d81429d8a7d8a9eefb7b"`
[INFO] running `"docker" "rm" "-f" "854d09dfce17bab9ea61020fbe25e74a86688bb7ae40d81429d8a7d8a9eefb7b"`
[INFO] [stdout] 854d09dfce17bab9ea61020fbe25e74a86688bb7ae40d81429d8a7d8a9eefb7b