[INFO] updating cached repository https://github.com/colemickens/euler-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune", kill_on_drop: false }`
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 441b787ba2e0e5564f582f883e355782ece155e4
[INFO] testing colemickens/euler-rust against beta-2020-07-24 for beta-1.46-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcolemickens%2Feuler-rust" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/colemickens/euler-rust on toolchain beta-2020-07-24
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/colemickens/euler-rust
[INFO] finished tweaking git repo https://github.com/colemickens/euler-rust
[INFO] tweaked toml for git repo https://github.com/colemickens/euler-rust written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/colemickens/euler-rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] error: the lock file /workspace/builds/worker-5/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-07-24" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b717bd2318cce00b296f9d6b51411a465e564ec00f1fce95496e51765132c3d5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "b717bd2318cce00b296f9d6b51411a465e564ec00f1fce95496e51765132c3d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b717bd2318cce00b296f9d6b51411a465e564ec00f1fce95496e51765132c3d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b717bd2318cce00b296f9d6b51411a465e564ec00f1fce95496e51765132c3d5", kill_on_drop: false }`
[INFO] [stdout] b717bd2318cce00b296f9d6b51411a465e564ec00f1fce95496e51765132c3d5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 40a469bbafff2a8bb62c6cfd74a4abc3b21811ede28d21e6daf2d59fc598b682
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "40a469bbafff2a8bb62c6cfd74a4abc3b21811ede28d21e6daf2d59fc598b682", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]    Compiling num-complex v0.1.43
[INFO] [stderr]    Compiling num-bigint v0.1.44
[INFO] [stderr]    Compiling num-rational v0.1.42
[INFO] [stderr]    Compiling num v0.1.42
[INFO] [stderr]    Compiling colemickens-euler-rust v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type alias is never used: `Output`
[INFO] [stdout]  --> src/primes.rs:7:3
[INFO] [stdout]   |
[INFO] [stdout] 7 |   type Output = BigInt;
[INFO] [stdout]   |   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 9.21s
[INFO] running `Command { std: "docker" "inspect" "40a469bbafff2a8bb62c6cfd74a4abc3b21811ede28d21e6daf2d59fc598b682", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "40a469bbafff2a8bb62c6cfd74a4abc3b21811ede28d21e6daf2d59fc598b682", kill_on_drop: false }`
[INFO] [stdout] 40a469bbafff2a8bb62c6cfd74a4abc3b21811ede28d21e6daf2d59fc598b682
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-07-24" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6695e882b1ce5a105fee10651473daed79bb19d2eb18235367512b5b61a67099
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6695e882b1ce5a105fee10651473daed79bb19d2eb18235367512b5b61a67099", kill_on_drop: false }`
[INFO] [stderr]    Compiling colemickens-euler-rust v0.0.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: type alias is never used: `Output`
[INFO] [stdout]  --> src/primes.rs:7:3
[INFO] [stdout]   |
[INFO] [stdout] 7 |   type Output = BigInt;
[INFO] [stdout]   |   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> tests/problem012.rs:42:1
[INFO] [stdout]    |
[INFO] [stdout] 42 | #![feature(iter_arith)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown lint: `unused_variable`
[INFO] [stdout]   --> tests/problem011.rs:66:9
[INFO] [stdout]    |
[INFO] [stdout] 66 | #[allow(unused_variable)]
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^ help: did you mean: `unused_variables`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unknown_lints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unknown lint: `unused_variable`
[INFO] [stdout]   --> tests/problem011.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 78 | #[allow(unused_variable)]
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^ help: did you mean: `unused_variables`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> tests/problem009.rs:18:12
[INFO] [stdout]    |
[INFO] [stdout] 18 |   for a in (0u64..target) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> tests/problem009.rs:19:14
[INFO] [stdout]    |
[INFO] [stdout] 19 |     for b in (0u64..a) {
[INFO] [stdout]    |              ^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> tests/problem004.rs:11:12
[INFO] [stdout]    |
[INFO] [stdout] 11 |   for i in (0u32..num_digits/2) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> tests/problem004.rs:25:12
[INFO] [stdout]    |
[INFO] [stdout] 25 |   for x in (1u64..upper_bound) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> tests/problem004.rs:26:14
[INFO] [stdout]    |
[INFO] [stdout] 26 |     for y in (1u64..x) {
[INFO] [stdout]    |              ^^^^^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> tests/problem010.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(iter_arith)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> tests/problem006.rs:15:1
[INFO] [stdout]    |
[INFO] [stdout] 15 | #![feature(iter_arith)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `colemickens-euler-rust`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> tests/problem011.rs:31:1
[INFO] [stdout]    |
[INFO] [stdout] 31 | #![feature(convert)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> tests/problem008.rs:31:1
[INFO] [stdout]    |
[INFO] [stdout] 31 | #![feature(convert)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias is never used: `Output`
[INFO] [stdout]  --> src/primes.rs:7:3
[INFO] [stdout]   |
[INFO] [stdout] 7 |   type Output = BigInt;
[INFO] [stdout]   |   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> tests/problem008.rs:32:1
[INFO] [stdout]    |
[INFO] [stdout] 32 | #![feature(iter_arith)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> tests/problem003.rs:9:1
[INFO] [stdout]   |
[INFO] [stdout] 9 | #![feature(iter_cmp)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::num`
[INFO] [stdout]   --> tests/problem005.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 13 | use std::num;
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `for` iterator expression
[INFO] [stdout]   --> tests/problem005.rs:41:12
[INFO] [stdout]    |
[INFO] [stdout] 41 |   for n in (lower_limit..upper_limit) {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stdout] error[E0593]: closure is expected to take 2 arguments, but it takes 1 argument
[INFO] [stdout]   --> tests/problem003.rs:19:20
[INFO] [stdout]    |
[INFO] [stdout] 19 |   *(factors.iter().max_by(|&x| x).unwrap())
[INFO] [stdout]    |                    ^^^^^^ ---- takes 1 argument
[INFO] [stdout]    |                    |
[INFO] [stdout]    |                    expected closure that takes 2 arguments
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0593.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "6695e882b1ce5a105fee10651473daed79bb19d2eb18235367512b5b61a67099", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6695e882b1ce5a105fee10651473daed79bb19d2eb18235367512b5b61a67099", kill_on_drop: false }`
[INFO] [stdout] 6695e882b1ce5a105fee10651473daed79bb19d2eb18235367512b5b61a67099