Dec 19 08:10:00.860 INFO checking stephen-lazaro/reuler against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 08:10:00.860 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-5/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/stephen-lazaro/reuler:/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 08:10:01.320 INFO [stdout] 37749b495fb420c6eb21901ff8e90d10f8112d16239f1989ec2fd45aa775f23d
Dec 19 08:10:01.324 INFO running `"docker" "start" "-a" "37749b495fb420c6eb21901ff8e90d10f8112d16239f1989ec2fd45aa775f23d"`
Dec 19 08:10:03.116 INFO [stderr]     Checking either v1.4.0
Dec 19 08:10:03.116 INFO [stderr]     Checking env_logger v0.3.5
Dec 19 08:10:03.592 INFO [stderr]     Checking itertools v0.7.3
Dec 19 08:10:03.756 INFO [stderr]     Checking quickcheck v0.3.2
Dec 19 08:10:06.335 INFO [stderr]     Checking reuler v0.1.0 (/opt/crater/workdir)
Dec 19 08:10:06.440 INFO [stderr] warning: unknown lint: `unused_import`
Dec 19 08:10:06.440 INFO [stderr]  --> src/lib.rs:5:9
Dec 19 08:10:06.440 INFO [stderr]   |
Dec 19 08:10:06.440 INFO [stderr] 5 | #[allow(unused_import)]
Dec 19 08:10:06.440 INFO [stderr]   |         ^^^^^^^^^^^^^
Dec 19 08:10:06.440 INFO [stderr]   |
Dec 19 08:10:06.441 INFO [stderr]   = note: #[warn(unknown_lints)] on by default
Dec 19 08:10:06.441 INFO [stderr] 
Dec 19 08:10:06.475 INFO [stderr] warning: unknown lint: `unused_import`
Dec 19 08:10:06.475 INFO [stderr]  --> src/lib.rs:5:9
Dec 19 08:10:06.476 INFO [stderr]   |
Dec 19 08:10:06.476 INFO [stderr] 5 | #[allow(unused_import)]
Dec 19 08:10:06.476 INFO [stderr]   |         ^^^^^^^^^^^^^
Dec 19 08:10:06.476 INFO [stderr]   |
Dec 19 08:10:06.476 INFO [stderr]   = note: #[warn(unknown_lints)] on by default
Dec 19 08:10:06.476 INFO [stderr] 
Dec 19 08:10:06.510 INFO [stderr] warning: unused `#[macro_use]` import
Dec 19 08:10:06.510 INFO [stderr]  --> src/lib.rs:3:1
Dec 19 08:10:06.510 INFO [stderr]   |
Dec 19 08:10:06.510 INFO [stderr] 3 | #[macro_use] extern crate itertools;
Dec 19 08:10:06.510 INFO [stderr]   | ^^^^^^^^^^^^
Dec 19 08:10:06.516 INFO [stderr]   |
Dec 19 08:10:06.516 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 08:10:06.516 INFO [stderr] 
Dec 19 08:10:06.624 INFO [stderr] warning: unused `#[macro_use]` import
Dec 19 08:10:06.624 INFO [stderr]  --> src/lib.rs:3:1
Dec 19 08:10:06.624 INFO [stderr]   |
Dec 19 08:10:06.624 INFO [stderr] 3 | #[macro_use] extern crate itertools;
Dec 19 08:10:06.625 INFO [stderr]   | ^^^^^^^^^^^^
Dec 19 08:10:06.625 INFO [stderr]   |
Dec 19 08:10:06.625 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 08:10:06.625 INFO [stderr] 
Dec 19 08:10:06.744 INFO [stderr] warning: value assigned to `triangular_num` is never read
Dec 19 08:10:06.744 INFO [stderr]  --> src/eulers/twelve.rs:6:13
Dec 19 08:10:06.745 INFO [stderr]   |
Dec 19 08:10:06.745 INFO [stderr] 6 |     let mut triangular_num = Some(6);
Dec 19 08:10:06.745 INFO [stderr]   |             ^^^^^^^^^^^^^^
Dec 19 08:10:06.745 INFO [stderr]   |
Dec 19 08:10:06.745 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 19 08:10:06.745 INFO [stderr]   = help: maybe it is overwritten before being read?
Dec 19 08:10:06.745 INFO [stderr] 
Dec 19 08:10:06.810 INFO [stderr] warning: the feature `inclusive_range_syntax` has been stable since 1.26.0 and no longer requires an attribute to enable
Dec 19 08:10:06.810 INFO [stderr]  --> src/lib.rs:1:12
Dec 19 08:10:06.811 INFO [stderr]   |
Dec 19 08:10:06.811 INFO [stderr] 1 | #![feature(inclusive_range_syntax)]
Dec 19 08:10:06.811 INFO [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^
Dec 19 08:10:06.812 INFO [stderr]   |
Dec 19 08:10:06.812 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 19 08:10:06.812 INFO [stderr] 
Dec 19 08:10:06.813 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Dec 19 08:10:06.813 INFO [stderr]  --> src/lib.rs:2:12
Dec 19 08:10:06.814 INFO [stderr]   |
Dec 19 08:10:06.814 INFO [stderr] 2 | #![feature(iterator_step_by)]
Dec 19 08:10:06.814 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 19 08:10:06.814 INFO [stderr] 
Dec 19 08:10:06.936 INFO [stderr] warning: value assigned to `triangular_num` is never read
Dec 19 08:10:06.937 INFO [stderr]  --> src/eulers/twelve.rs:6:13
Dec 19 08:10:06.937 INFO [stderr]   |
Dec 19 08:10:06.937 INFO [stderr] 6 |     let mut triangular_num = Some(6);
Dec 19 08:10:06.937 INFO [stderr]   |             ^^^^^^^^^^^^^^
Dec 19 08:10:06.937 INFO [stderr]   |
Dec 19 08:10:06.938 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 19 08:10:06.938 INFO [stderr]   = help: maybe it is overwritten before being read?
Dec 19 08:10:06.938 INFO [stderr] 
Dec 19 08:10:07.056 INFO [stderr] warning: struct is never constructed: `Valid`
Dec 19 08:10:07.056 INFO [stderr]   --> src/lib.rs:15:5
Dec 19 08:10:07.057 INFO [stderr]    |
Dec 19 08:10:07.057 INFO [stderr] 15 |     pub struct Valid <A : Testable> (A);
Dec 19 08:10:07.057 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 08:10:07.058 INFO [stderr] warning: unknown lint: `unused_import`
Dec 19 08:10:07.058 INFO [stderr]  --> src/main.rs:5:9
Dec 19 08:10:07.058 INFO [stderr]   |
Dec 19 08:10:07.058 INFO [stderr] 5 | #[allow(unused_import)]
Dec 19 08:10:07.059 INFO [stderr]   |         ^^^^^^^^^^^^^
Dec 19 08:10:07.059 INFO [stderr]   |
Dec 19 08:10:07.059 INFO [stderr]   = note: #[warn(unknown_lints)] on by default
Dec 19 08:10:07.059 INFO [stderr] 
Dec 19 08:10:07.059 INFO [stderr]    |
Dec 19 08:10:07.060 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 08:10:07.060 INFO [stderr] 
Dec 19 08:10:07.060 INFO [stderr] warning: struct is never constructed: `Invalid`
Dec 19 08:10:07.061 INFO [stderr]   --> src/lib.rs:16:5
Dec 19 08:10:07.061 INFO [stderr]    |
Dec 19 08:10:07.061 INFO [stderr] 16 |     pub struct Invalid <A : Testable> (A);
Dec 19 08:10:07.062 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 08:10:07.062 INFO [stderr] 
Dec 19 08:10:07.062 INFO [stderr] warning: the feature `inclusive_range_syntax` has been stable since 1.26.0 and no longer requires an attribute to enable
Dec 19 08:10:07.063 INFO [stderr]  --> src/lib.rs:1:12
Dec 19 08:10:07.063 INFO [stderr]   |
Dec 19 08:10:07.063 INFO [stderr] 1 | #![feature(inclusive_range_syntax)]
Dec 19 08:10:07.064 INFO [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^
Dec 19 08:10:07.064 INFO [stderr]   |
Dec 19 08:10:07.064 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 19 08:10:07.065 INFO [stderr] 
Dec 19 08:10:07.066 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Dec 19 08:10:07.066 INFO [stderr]  --> src/lib.rs:2:12
Dec 19 08:10:07.066 INFO [stderr]   |
Dec 19 08:10:07.066 INFO [stderr] 2 | #![feature(iterator_step_by)]
Dec 19 08:10:07.067 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 19 08:10:07.067 INFO [stderr] 
Dec 19 08:10:07.111 INFO [stderr] warning: unknown lint: `unused_import`
Dec 19 08:10:07.111 INFO [stderr]  --> src/main.rs:5:9
Dec 19 08:10:07.111 INFO [stderr]   |
Dec 19 08:10:07.111 INFO [stderr] 5 | #[allow(unused_import)]
Dec 19 08:10:07.111 INFO [stderr]   |         ^^^^^^^^^^^^^
Dec 19 08:10:07.111 INFO [stderr]   |
Dec 19 08:10:07.111 INFO [stderr]   = note: #[warn(unknown_lints)] on by default
Dec 19 08:10:07.111 INFO [stderr] 
Dec 19 08:10:07.189 INFO [stderr] warning: unused `#[macro_use]` import
Dec 19 08:10:07.189 INFO [stderr]  --> src/main.rs:3:1
Dec 19 08:10:07.189 INFO [stderr]   |
Dec 19 08:10:07.189 INFO [stderr] 3 | #[macro_use] extern crate itertools;
Dec 19 08:10:07.189 INFO [stderr]   | ^^^^^^^^^^^^
Dec 19 08:10:07.189 INFO [stderr]   |
Dec 19 08:10:07.189 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 08:10:07.189 INFO [stderr] 
Dec 19 08:10:07.240 INFO [stderr] warning: unused `#[macro_use]` import
Dec 19 08:10:07.240 INFO [stderr]  --> src/main.rs:3:1
Dec 19 08:10:07.240 INFO [stderr]   |
Dec 19 08:10:07.240 INFO [stderr] 3 | #[macro_use] extern crate itertools;
Dec 19 08:10:07.240 INFO [stderr]   | ^^^^^^^^^^^^
Dec 19 08:10:07.240 INFO [stderr]   |
Dec 19 08:10:07.240 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 08:10:07.240 INFO [stderr] 
Dec 19 08:10:07.479 INFO [stderr] warning: value assigned to `triangular_num` is never read
Dec 19 08:10:07.479 INFO [stderr]  --> src/eulers/twelve.rs:6:13
Dec 19 08:10:07.479 INFO [stderr]   |
Dec 19 08:10:07.479 INFO [stderr] 6 |     let mut triangular_num = Some(6);
Dec 19 08:10:07.479 INFO [stderr]   |             ^^^^^^^^^^^^^^
Dec 19 08:10:07.479 INFO [stderr]   |
Dec 19 08:10:07.479 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 19 08:10:07.479 INFO [stderr]   = help: maybe it is overwritten before being read?
Dec 19 08:10:07.479 INFO [stderr] 
Dec 19 08:10:07.488 INFO [stderr] warning: value assigned to `triangular_num` is never read
Dec 19 08:10:07.488 INFO [stderr]  --> src/eulers/twelve.rs:6:13
Dec 19 08:10:07.488 INFO [stderr]   |
Dec 19 08:10:07.489 INFO [stderr] 6 |     let mut triangular_num = Some(6);
Dec 19 08:10:07.489 INFO [stderr]   |             ^^^^^^^^^^^^^^
Dec 19 08:10:07.489 INFO [stderr]   |
Dec 19 08:10:07.489 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 19 08:10:07.489 INFO [stderr]   = help: maybe it is overwritten before being read?
Dec 19 08:10:07.489 INFO [stderr] 
Dec 19 08:10:07.526 INFO [stderr] warning: the feature `inclusive_range_syntax` has been stable since 1.26.0 and no longer requires an attribute to enable
Dec 19 08:10:07.526 INFO [stderr]  --> src/main.rs:1:12
Dec 19 08:10:07.526 INFO [stderr]   |
Dec 19 08:10:07.526 INFO [stderr] 1 | #![feature(inclusive_range_syntax)]
Dec 19 08:10:07.526 INFO [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^
Dec 19 08:10:07.526 INFO [stderr]   |
Dec 19 08:10:07.526 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 19 08:10:07.526 INFO [stderr] 
Dec 19 08:10:07.527 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Dec 19 08:10:07.527 INFO [stderr]  --> src/main.rs:2:12
Dec 19 08:10:07.527 INFO [stderr]   |
Dec 19 08:10:07.527 INFO [stderr] 2 | #![feature(iterator_step_by)]
Dec 19 08:10:07.527 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 19 08:10:07.527 INFO [stderr] 
Dec 19 08:10:07.578 INFO [stderr] warning: the feature `inclusive_range_syntax` has been stable since 1.26.0 and no longer requires an attribute to enable
Dec 19 08:10:07.579 INFO [stderr]  --> src/main.rs:1:12
Dec 19 08:10:07.579 INFO [stderr]   |
Dec 19 08:10:07.580 INFO [stderr] 1 | #![feature(inclusive_range_syntax)]
Dec 19 08:10:07.580 INFO [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^
Dec 19 08:10:07.580 INFO [stderr]   |
Dec 19 08:10:07.581 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 19 08:10:07.581 INFO [stderr] 
Dec 19 08:10:07.581 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Dec 19 08:10:07.581 INFO [stderr]  --> src/main.rs:2:12
Dec 19 08:10:07.582 INFO [stderr]   |
Dec 19 08:10:07.582 INFO [stderr] 2 | #![feature(iterator_step_by)]
Dec 19 08:10:07.583 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 19 08:10:07.583 INFO [stderr] 
Dec 19 08:10:07.621 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.58s
Dec 19 08:10:09.169 INFO running `"docker" "inspect" "37749b495fb420c6eb21901ff8e90d10f8112d16239f1989ec2fd45aa775f23d"`
Dec 19 08:10:09.562 INFO running `"docker" "rm" "-f" "37749b495fb420c6eb21901ff8e90d10f8112d16239f1989ec2fd45aa775f23d"`
Dec 19 08:10:09.952 INFO [stdout] 37749b495fb420c6eb21901ff8e90d10f8112d16239f1989ec2fd45aa775f23d