Dec 17 14:43:50.752 INFO checking stephen-lazaro/reuler against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 14:43:50.753 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-1/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 14:43:51.208 INFO [stdout] 55df5955c4ca7e6846d91e5e2b2ea04d29ce012f408932f9c669c2ab1f2145df
Dec 17 14:43:51.210 INFO running `"docker" "start" "-a" "55df5955c4ca7e6846d91e5e2b2ea04d29ce012f408932f9c669c2ab1f2145df"`
Dec 17 14:43:53.156 INFO [stderr]     Checking memchr v0.1.11
Dec 17 14:43:53.156 INFO [stderr]     Checking itertools v0.7.3
Dec 17 14:43:53.172 INFO [stderr]     Checking thread-id v2.0.0
Dec 17 14:43:53.453 INFO [stderr]     Checking thread_local v0.2.7
Dec 17 14:43:53.900 INFO [stderr]     Checking aho-corasick v0.5.3
Dec 17 14:43:55.061 INFO [stderr]     Checking regex v0.1.80
Dec 17 14:43:56.616 INFO [stderr]     Checking reuler v0.1.0 (/opt/crater/workdir)
Dec 17 14:43:56.811 INFO [stderr] warning: unknown lint: `unused_import`
Dec 17 14:43:56.811 INFO [stderr]  --> src/lib.rs:5:9
Dec 17 14:43:56.812 INFO [stderr]   |
Dec 17 14:43:56.812 INFO [stderr] 5 | #[allow(unused_import)]
Dec 17 14:43:56.812 INFO [stderr]   |         ^^^^^^^^^^^^^
Dec 17 14:43:56.812 INFO [stderr]   |
Dec 17 14:43:56.813 INFO [stderr]   = note: #[warn(unknown_lints)] on by default
Dec 17 14:43:56.813 INFO [stderr] 
Dec 17 14:43:56.900 INFO [stderr] warning: unused `#[macro_use]` import
Dec 17 14:43:56.901 INFO [stderr]  --> src/lib.rs:3:1
Dec 17 14:43:56.901 INFO [stderr]   |
Dec 17 14:43:56.901 INFO [stderr] 3 | #[macro_use] extern crate itertools;
Dec 17 14:43:56.901 INFO [stderr]   | ^^^^^^^^^^^^
Dec 17 14:43:56.902 INFO [stderr]   |
Dec 17 14:43:56.902 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 17 14:43:56.902 INFO [stderr] 
Dec 17 14:43:57.228 INFO [stderr] warning: value assigned to `triangular_num` is never read
Dec 17 14:43:57.229 INFO [stderr]  --> src/eulers/twelve.rs:6:13
Dec 17 14:43:57.229 INFO [stderr]   |
Dec 17 14:43:57.229 INFO [stderr] 6 |     let mut triangular_num = Some(6);
Dec 17 14:43:57.230 INFO [stderr]   |             ^^^^^^^^^^^^^^
Dec 17 14:43:57.230 INFO [stderr]   |
Dec 17 14:43:57.230 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 17 14:43:57.231 INFO [stderr] 
Dec 17 14:43:57.298 INFO [stderr] warning: the feature `inclusive_range_syntax` has been stable since 1.26.0 and no longer requires an attribute to enable
Dec 17 14:43:57.298 INFO [stderr]  --> src/lib.rs:1:12
Dec 17 14:43:57.298 INFO [stderr]   |
Dec 17 14:43:57.298 INFO [stderr] 1 | #![feature(inclusive_range_syntax)]
Dec 17 14:43:57.298 INFO [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^
Dec 17 14:43:57.299 INFO [stderr]   |
Dec 17 14:43:57.299 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 17 14:43:57.299 INFO [stderr] 
Dec 17 14:43:57.299 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Dec 17 14:43:57.299 INFO [stderr]  --> src/lib.rs:2:12
Dec 17 14:43:57.300 INFO [stderr]   |
Dec 17 14:43:57.300 INFO [stderr] 2 | #![feature(iterator_step_by)]
Dec 17 14:43:57.300 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 17 14:43:57.300 INFO [stderr] 
Dec 17 14:43:57.530 INFO [stderr] warning: unknown lint: `unused_import`
Dec 17 14:43:57.530 INFO [stderr]  --> src/main.rs:5:9
Dec 17 14:43:57.530 INFO [stderr]   |
Dec 17 14:43:57.531 INFO [stderr] 5 | #[allow(unused_import)]
Dec 17 14:43:57.531 INFO [stderr]   |         ^^^^^^^^^^^^^
Dec 17 14:43:57.531 INFO [stderr]   |
Dec 17 14:43:57.532 INFO [stderr]   = note: #[warn(unknown_lints)] on by default
Dec 17 14:43:57.532 INFO [stderr] 
Dec 17 14:43:57.632 INFO [stderr] warning: unused `#[macro_use]` import
Dec 17 14:43:57.633 INFO [stderr]  --> src/main.rs:3:1
Dec 17 14:43:57.633 INFO [stderr]   |
Dec 17 14:43:57.633 INFO [stderr] 3 | #[macro_use] extern crate itertools;
Dec 17 14:43:57.634 INFO [stderr]   | ^^^^^^^^^^^^
Dec 17 14:43:57.634 INFO [stderr]   |
Dec 17 14:43:57.634 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 17 14:43:57.634 INFO [stderr] 
Dec 17 14:43:57.929 INFO [stderr] warning: value assigned to `triangular_num` is never read
Dec 17 14:43:57.929 INFO [stderr]  --> src/eulers/twelve.rs:6:13
Dec 17 14:43:57.929 INFO [stderr]   |
Dec 17 14:43:57.930 INFO [stderr] 6 |     let mut triangular_num = Some(6);
Dec 17 14:43:57.930 INFO [stderr]   |             ^^^^^^^^^^^^^^
Dec 17 14:43:57.930 INFO [stderr]   |
Dec 17 14:43:57.931 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 17 14:43:57.931 INFO [stderr] 
Dec 17 14:43:58.028 INFO [stderr] warning: the feature `inclusive_range_syntax` has been stable since 1.26.0 and no longer requires an attribute to enable
Dec 17 14:43:58.029 INFO [stderr]  --> src/main.rs:1:12
Dec 17 14:43:58.029 INFO [stderr]   |
Dec 17 14:43:58.029 INFO [stderr] 1 | #![feature(inclusive_range_syntax)]
Dec 17 14:43:58.029 INFO [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^
Dec 17 14:43:58.029 INFO [stderr]   |
Dec 17 14:43:58.029 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 17 14:43:58.029 INFO [stderr] 
Dec 17 14:43:58.030 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Dec 17 14:43:58.030 INFO [stderr]  --> src/main.rs:2:12
Dec 17 14:43:58.030 INFO [stderr]   |
Dec 17 14:43:58.030 INFO [stderr] 2 | #![feature(iterator_step_by)]
Dec 17 14:43:58.030 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 17 14:43:58.030 INFO [stderr] 
Dec 17 14:43:58.474 INFO [stderr]     Checking env_logger v0.3.5
Dec 17 14:43:58.888 INFO [stderr]     Checking quickcheck v0.3.2
Dec 17 14:44:00.194 INFO [stderr] warning: unknown lint: `unused_import`
Dec 17 14:44:00.194 INFO [stderr]  --> src/main.rs:5:9
Dec 17 14:44:00.194 INFO [stderr]   |
Dec 17 14:44:00.194 INFO [stderr] 5 | #[allow(unused_import)]
Dec 17 14:44:00.194 INFO [stderr]   |         ^^^^^^^^^^^^^
Dec 17 14:44:00.194 INFO [stderr]   |
Dec 17 14:44:00.194 INFO [stderr]   = note: #[warn(unknown_lints)] on by default
Dec 17 14:44:00.194 INFO [stderr] 
Dec 17 14:44:00.308 INFO [stderr] warning: unused `#[macro_use]` import
Dec 17 14:44:00.308 INFO [stderr]  --> src/main.rs:3:1
Dec 17 14:44:00.308 INFO [stderr]   |
Dec 17 14:44:00.308 INFO [stderr] 3 | #[macro_use] extern crate itertools;
Dec 17 14:44:00.308 INFO [stderr]   | ^^^^^^^^^^^^
Dec 17 14:44:00.309 INFO [stderr] warning: unknown lint: `unused_import`
Dec 17 14:44:00.309 INFO [stderr]  --> src/lib.rs:5:9
Dec 17 14:44:00.309 INFO [stderr]   |
Dec 17 14:44:00.309 INFO [stderr] 5 | #[allow(unused_import)]
Dec 17 14:44:00.309 INFO [stderr]   |         ^^^^^^^^^^^^^
Dec 17 14:44:00.309 INFO [stderr]   |
Dec 17 14:44:00.309 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 17 14:44:00.309 INFO [stderr] 
Dec 17 14:44:00.328 INFO [stderr]   |
Dec 17 14:44:00.328 INFO [stderr]   = note: #[warn(unknown_lints)] on by default
Dec 17 14:44:00.328 INFO [stderr] 
Dec 17 14:44:00.531 INFO [stderr] warning: unused `#[macro_use]` import
Dec 17 14:44:00.531 INFO [stderr]  --> src/lib.rs:3:1
Dec 17 14:44:00.531 INFO [stderr]   |
Dec 17 14:44:00.531 INFO [stderr] 3 | #[macro_use] extern crate itertools;
Dec 17 14:44:00.531 INFO [stderr]   | ^^^^^^^^^^^^
Dec 17 14:44:00.548 INFO [stderr]   |
Dec 17 14:44:00.548 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 17 14:44:00.548 INFO [stderr] 
Dec 17 14:44:00.672 INFO [stderr] warning: value assigned to `triangular_num` is never read
Dec 17 14:44:00.672 INFO [stderr]  --> src/eulers/twelve.rs:6:13
Dec 17 14:44:00.672 INFO [stderr]   |
Dec 17 14:44:00.672 INFO [stderr] 6 |     let mut triangular_num = Some(6);
Dec 17 14:44:00.672 INFO [stderr]   |             ^^^^^^^^^^^^^^
Dec 17 14:44:00.672 INFO [stderr]   |
Dec 17 14:44:00.672 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 17 14:44:00.672 INFO [stderr] 
Dec 17 14:44:00.816 INFO [stderr] warning: the feature `inclusive_range_syntax` has been stable since 1.26.0 and no longer requires an attribute to enable
Dec 17 14:44:00.816 INFO [stderr]  --> src/main.rs:1:12
Dec 17 14:44:00.816 INFO [stderr]   |
Dec 17 14:44:00.816 INFO [stderr] 1 | #![feature(inclusive_range_syntax)]
Dec 17 14:44:00.816 INFO [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^
Dec 17 14:44:00.816 INFO [stderr]   |
Dec 17 14:44:00.817 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 17 14:44:00.817 INFO [stderr] 
Dec 17 14:44:00.817 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Dec 17 14:44:00.817 INFO [stderr]  --> src/main.rs:2:12
Dec 17 14:44:00.817 INFO [stderr]   |
Dec 17 14:44:00.817 INFO [stderr] 2 | #![feature(iterator_step_by)]
Dec 17 14:44:00.817 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 17 14:44:00.817 INFO [stderr] 
Dec 17 14:44:00.988 INFO [stderr] warning: value assigned to `triangular_num` is never read
Dec 17 14:44:00.988 INFO [stderr]  --> src/eulers/twelve.rs:6:13
Dec 17 14:44:00.988 INFO [stderr]   |
Dec 17 14:44:00.988 INFO [stderr] 6 |     let mut triangular_num = Some(6);
Dec 17 14:44:00.988 INFO [stderr]   |             ^^^^^^^^^^^^^^
Dec 17 14:44:00.988 INFO [stderr]   |
Dec 17 14:44:00.988 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 17 14:44:00.988 INFO [stderr] 
Dec 17 14:44:01.055 INFO [stderr] warning: struct is never constructed: `Valid`
Dec 17 14:44:01.055 INFO [stderr]   --> src/lib.rs:15:5
Dec 17 14:44:01.055 INFO [stderr]    |
Dec 17 14:44:01.056 INFO [stderr] 15 |     pub struct Valid <A : Testable> (A);
Dec 17 14:44:01.056 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 14:44:01.056 INFO [stderr]    |
Dec 17 14:44:01.056 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 17 14:44:01.056 INFO [stderr] 
Dec 17 14:44:01.056 INFO [stderr] warning: struct is never constructed: `Invalid`
Dec 17 14:44:01.056 INFO [stderr]   --> src/lib.rs:16:5
Dec 17 14:44:01.056 INFO [stderr]    |
Dec 17 14:44:01.056 INFO [stderr] 16 |     pub struct Invalid <A : Testable> (A);
Dec 17 14:44:01.056 INFO [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 14:44:01.056 INFO [stderr] 
Dec 17 14:44:01.056 INFO [stderr] warning: the feature `inclusive_range_syntax` has been stable since 1.26.0 and no longer requires an attribute to enable
Dec 17 14:44:01.056 INFO [stderr]  --> src/lib.rs:1:12
Dec 17 14:44:01.056 INFO [stderr]   |
Dec 17 14:44:01.056 INFO [stderr] 1 | #![feature(inclusive_range_syntax)]
Dec 17 14:44:01.056 INFO [stderr]   |            ^^^^^^^^^^^^^^^^^^^^^^
Dec 17 14:44:01.056 INFO [stderr]   |
Dec 17 14:44:01.056 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 17 14:44:01.056 INFO [stderr] 
Dec 17 14:44:01.057 INFO [stderr] warning: the feature `iterator_step_by` has been stable since 1.28.0 and no longer requires an attribute to enable
Dec 17 14:44:01.057 INFO [stderr]  --> src/lib.rs:2:12
Dec 17 14:44:01.057 INFO [stderr]   |
Dec 17 14:44:01.057 INFO [stderr] 2 | #![feature(iterator_step_by)]
Dec 17 14:44:01.057 INFO [stderr]   |            ^^^^^^^^^^^^^^^^
Dec 17 14:44:01.057 INFO [stderr] 
Dec 17 14:44:01.097 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.03s
Dec 17 14:44:02.465 INFO running `"docker" "inspect" "55df5955c4ca7e6846d91e5e2b2ea04d29ce012f408932f9c669c2ab1f2145df"`
Dec 17 14:44:02.826 INFO running `"docker" "rm" "-f" "55df5955c4ca7e6846d91e5e2b2ea04d29ce012f408932f9c669c2ab1f2145df"`
Dec 17 14:44:03.236 INFO [stdout] 55df5955c4ca7e6846d91e5e2b2ea04d29ce012f408932f9c669c2ab1f2145df