Dec 05 17:39:02.327 INFO testing kirjavascript/duplex against master#906deae0790bd18681b937fe9a141a3c26cf1855 for pr-56514
Dec 05 17:39:02.327 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-5/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +906deae0790bd18681b937fe9a141a3c26cf1855-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 05 17:39:02.751 INFO [stdout] 78a3cdbb43236bf5a9dc155dc773d33951be9b188bc490db48485f874ab627ff
Dec 05 17:39:02.753 INFO running `"docker" "start" "-a" "78a3cdbb43236bf5a9dc155dc773d33951be9b188bc490db48485f874ab627ff"`
Dec 05 17:39:03.392 INFO [stderr] usermod: no changes
Dec 05 17:39:03.440 INFO [stderr]    Compiling duplex v0.1.0 (/source)
Dec 05 17:39:04.303 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.304 INFO [stderr]    --> src/cube.rs:546:9
Dec 05 17:39:04.304 INFO [stderr]     |
Dec 05 17:39:04.305 INFO [stderr] 546 |         write!(f, "{} ", self.corners[0]);
Dec 05 17:39:04.305 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.305 INFO [stderr]     |
Dec 05 17:39:04.305 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 05 17:39:04.306 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.306 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.306 INFO [stderr] 
Dec 05 17:39:04.307 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.307 INFO [stderr]    --> src/cube.rs:547:9
Dec 05 17:39:04.307 INFO [stderr]     |
Dec 05 17:39:04.308 INFO [stderr] 547 |         write!(f, "{} ", self.edges[0]);
Dec 05 17:39:04.308 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.308 INFO [stderr]     |
Dec 05 17:39:04.309 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.309 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.309 INFO [stderr] 
Dec 05 17:39:04.309 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.309 INFO [stderr]    --> src/cube.rs:548:9
Dec 05 17:39:04.309 INFO [stderr]     |
Dec 05 17:39:04.309 INFO [stderr] 548 |         write!(f, "{}\n", self.corners[1]);
Dec 05 17:39:04.309 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.309 INFO [stderr]     |
Dec 05 17:39:04.309 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.309 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.309 INFO [stderr] 
Dec 05 17:39:04.309 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.310 INFO [stderr]    --> src/cube.rs:549:9
Dec 05 17:39:04.310 INFO [stderr]     |
Dec 05 17:39:04.310 INFO [stderr] 549 |         write!(f, "{}  ", self.edges[3]);
Dec 05 17:39:04.310 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.310 INFO [stderr]     |
Dec 05 17:39:04.310 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.310 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.310 INFO [stderr] 
Dec 05 17:39:04.310 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.310 INFO [stderr]    --> src/cube.rs:550:9
Dec 05 17:39:04.310 INFO [stderr]     |
Dec 05 17:39:04.310 INFO [stderr] 550 |         write!(f, "{:?}  ", self.centres[0]);
Dec 05 17:39:04.310 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.310 INFO [stderr]     |
Dec 05 17:39:04.310 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.310 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.310 INFO [stderr] 
Dec 05 17:39:04.310 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.310 INFO [stderr]    --> src/cube.rs:551:9
Dec 05 17:39:04.310 INFO [stderr]     |
Dec 05 17:39:04.310 INFO [stderr] 551 |         write!(f, "{}  \n", self.edges[1]);
Dec 05 17:39:04.310 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.310 INFO [stderr]     |
Dec 05 17:39:04.310 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.310 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.310 INFO [stderr] 
Dec 05 17:39:04.310 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.310 INFO [stderr]    --> src/cube.rs:552:9
Dec 05 17:39:04.310 INFO [stderr]     |
Dec 05 17:39:04.310 INFO [stderr] 552 |         write!(f, "{} ", self.corners[3]);
Dec 05 17:39:04.310 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.310 INFO [stderr]     |
Dec 05 17:39:04.310 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.311 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.311 INFO [stderr] 
Dec 05 17:39:04.311 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.311 INFO [stderr]    --> src/cube.rs:553:9
Dec 05 17:39:04.311 INFO [stderr]     |
Dec 05 17:39:04.311 INFO [stderr] 553 |         write!(f, "{} ", self.edges[2]);
Dec 05 17:39:04.311 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.311 INFO [stderr]     |
Dec 05 17:39:04.311 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.311 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.311 INFO [stderr] 
Dec 05 17:39:04.311 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.311 INFO [stderr]    --> src/cube.rs:554:9
Dec 05 17:39:04.311 INFO [stderr]     |
Dec 05 17:39:04.311 INFO [stderr] 554 |         write!(f, "{}\n", self.corners[2]);
Dec 05 17:39:04.311 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.311 INFO [stderr]     |
Dec 05 17:39:04.311 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.311 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.311 INFO [stderr] 
Dec 05 17:39:04.311 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.311 INFO [stderr]    --> src/cube.rs:555:9
Dec 05 17:39:04.311 INFO [stderr]     |
Dec 05 17:39:04.311 INFO [stderr] 555 |         write!(f, "--  -- --\n");
Dec 05 17:39:04.311 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.311 INFO [stderr]     |
Dec 05 17:39:04.311 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.311 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.311 INFO [stderr] 
Dec 05 17:39:04.311 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.311 INFO [stderr]    --> src/cube.rs:556:9
Dec 05 17:39:04.311 INFO [stderr]     |
Dec 05 17:39:04.311 INFO [stderr] 556 |         write!(f, "{}  ", self.edges[4]);
Dec 05 17:39:04.311 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.311 INFO [stderr]     |
Dec 05 17:39:04.311 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.311 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.311 INFO [stderr] 
Dec 05 17:39:04.311 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.311 INFO [stderr]    --> src/cube.rs:557:9
Dec 05 17:39:04.311 INFO [stderr]     |
Dec 05 17:39:04.311 INFO [stderr] 557 |         write!(f, "{:?}  ", self.centres[2]);
Dec 05 17:39:04.311 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.311 INFO [stderr]     |
Dec 05 17:39:04.311 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.311 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.311 INFO [stderr] 
Dec 05 17:39:04.311 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.312 INFO [stderr]    --> src/cube.rs:558:9
Dec 05 17:39:04.312 INFO [stderr]     |
Dec 05 17:39:04.312 INFO [stderr] 558 |         write!(f, "{}  \n", self.edges[5]);
Dec 05 17:39:04.312 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.312 INFO [stderr]     |
Dec 05 17:39:04.312 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.312 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.312 INFO [stderr] 
Dec 05 17:39:04.312 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.312 INFO [stderr]    --> src/cube.rs:559:9
Dec 05 17:39:04.312 INFO [stderr]     |
Dec 05 17:39:04.312 INFO [stderr] 559 |         write!(f, "{:?}       ", self.centres[5]);
Dec 05 17:39:04.312 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.312 INFO [stderr]     |
Dec 05 17:39:04.312 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.312 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.312 INFO [stderr] 
Dec 05 17:39:04.312 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.312 INFO [stderr]    --> src/cube.rs:560:9
Dec 05 17:39:04.312 INFO [stderr]     |
Dec 05 17:39:04.312 INFO [stderr] 560 |         write!(f, "{:?}\n", self.centres[3]);
Dec 05 17:39:04.312 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.312 INFO [stderr]     |
Dec 05 17:39:04.312 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.312 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.312 INFO [stderr] 
Dec 05 17:39:04.312 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.312 INFO [stderr]    --> src/cube.rs:561:9
Dec 05 17:39:04.312 INFO [stderr]     |
Dec 05 17:39:04.312 INFO [stderr] 561 |         write!(f, "{}  ", self.edges[7]);
Dec 05 17:39:04.312 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.312 INFO [stderr]     |
Dec 05 17:39:04.312 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.312 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.312 INFO [stderr] 
Dec 05 17:39:04.312 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.312 INFO [stderr]    --> src/cube.rs:562:9
Dec 05 17:39:04.312 INFO [stderr]     |
Dec 05 17:39:04.312 INFO [stderr] 562 |         write!(f, "{:?}  ", self.centres[4]);
Dec 05 17:39:04.312 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.312 INFO [stderr]     |
Dec 05 17:39:04.312 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.312 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.312 INFO [stderr] 
Dec 05 17:39:04.312 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.312 INFO [stderr]    --> src/cube.rs:563:9
Dec 05 17:39:04.312 INFO [stderr]     |
Dec 05 17:39:04.312 INFO [stderr] 563 |         write!(f, "{}\n", self.edges[6]);
Dec 05 17:39:04.312 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.312 INFO [stderr]     |
Dec 05 17:39:04.312 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.312 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.312 INFO [stderr] 
Dec 05 17:39:04.312 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.312 INFO [stderr]    --> src/cube.rs:564:9
Dec 05 17:39:04.312 INFO [stderr]     |
Dec 05 17:39:04.312 INFO [stderr] 564 |         write!(f, "--  -- --\n");
Dec 05 17:39:04.312 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.312 INFO [stderr]     |
Dec 05 17:39:04.312 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.312 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.312 INFO [stderr] 
Dec 05 17:39:04.313 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.313 INFO [stderr]    --> src/cube.rs:565:9
Dec 05 17:39:04.313 INFO [stderr]     |
Dec 05 17:39:04.313 INFO [stderr] 565 |         write!(f, "{} ", self.corners[4]);
Dec 05 17:39:04.313 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.313 INFO [stderr]     |
Dec 05 17:39:04.313 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.313 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.313 INFO [stderr] 
Dec 05 17:39:04.313 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.313 INFO [stderr]    --> src/cube.rs:566:9
Dec 05 17:39:04.313 INFO [stderr]     |
Dec 05 17:39:04.313 INFO [stderr] 566 |         write!(f, "{} ", self.edges[8]);
Dec 05 17:39:04.313 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.313 INFO [stderr]     |
Dec 05 17:39:04.313 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.313 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.313 INFO [stderr] 
Dec 05 17:39:04.313 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.313 INFO [stderr]    --> src/cube.rs:567:9
Dec 05 17:39:04.313 INFO [stderr]     |
Dec 05 17:39:04.313 INFO [stderr] 567 |         write!(f, "{}\n", self.corners[5]);
Dec 05 17:39:04.313 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.313 INFO [stderr]     |
Dec 05 17:39:04.313 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.313 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.313 INFO [stderr] 
Dec 05 17:39:04.313 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.313 INFO [stderr]    --> src/cube.rs:568:9
Dec 05 17:39:04.313 INFO [stderr]     |
Dec 05 17:39:04.313 INFO [stderr] 568 |         write!(f, "{}  ", self.edges[11]);
Dec 05 17:39:04.313 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.313 INFO [stderr]     |
Dec 05 17:39:04.313 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.313 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.313 INFO [stderr] 
Dec 05 17:39:04.313 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.313 INFO [stderr]    --> src/cube.rs:569:9
Dec 05 17:39:04.313 INFO [stderr]     |
Dec 05 17:39:04.313 INFO [stderr] 569 |         write!(f, "{:?}  ", self.centres[1]);
Dec 05 17:39:04.313 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.313 INFO [stderr]     |
Dec 05 17:39:04.313 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.313 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.313 INFO [stderr] 
Dec 05 17:39:04.313 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.313 INFO [stderr]    --> src/cube.rs:570:9
Dec 05 17:39:04.313 INFO [stderr]     |
Dec 05 17:39:04.313 INFO [stderr] 570 |         write!(f, "{}  \n", self.edges[9]);
Dec 05 17:39:04.313 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.313 INFO [stderr]     |
Dec 05 17:39:04.313 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.313 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.313 INFO [stderr] 
Dec 05 17:39:04.313 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.313 INFO [stderr]    --> src/cube.rs:571:9
Dec 05 17:39:04.313 INFO [stderr]     |
Dec 05 17:39:04.313 INFO [stderr] 571 |         write!(f, "{} ", self.corners[7]);
Dec 05 17:39:04.313 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.313 INFO [stderr]     |
Dec 05 17:39:04.313 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.313 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.313 INFO [stderr] 
Dec 05 17:39:04.313 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:04.313 INFO [stderr]    --> src/cube.rs:572:9
Dec 05 17:39:04.313 INFO [stderr]     |
Dec 05 17:39:04.313 INFO [stderr] 572 |         write!(f, "{} ", self.edges[10]);
Dec 05 17:39:04.313 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:04.314 INFO [stderr]     |
Dec 05 17:39:04.314 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:04.314 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:04.314 INFO [stderr] 
Dec 05 17:39:05.813 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.40s
Dec 05 17:39:05.817 INFO [stderr] su: No module specific data is present
Dec 05 17:39:07.475 INFO running `"docker" "inspect" "78a3cdbb43236bf5a9dc155dc773d33951be9b188bc490db48485f874ab627ff"`
Dec 05 17:39:07.554 INFO running `"docker" "rm" "-f" "78a3cdbb43236bf5a9dc155dc773d33951be9b188bc490db48485f874ab627ff"`
Dec 05 17:39:07.622 INFO [stdout] 78a3cdbb43236bf5a9dc155dc773d33951be9b188bc490db48485f874ab627ff
Dec 05 17:39:07.626 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-5/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +906deae0790bd18681b937fe9a141a3c26cf1855-alt test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 05 17:39:07.780 INFO [stdout] 1c37493496d3cd8a6f599cb2500c679c129bb3b702c811ff42b2b73ce4b8347c
Dec 05 17:39:07.782 INFO running `"docker" "start" "-a" "1c37493496d3cd8a6f599cb2500c679c129bb3b702c811ff42b2b73ce4b8347c"`
Dec 05 17:39:08.593 INFO [stderr] usermod: no changes
Dec 05 17:39:08.637 INFO [stderr]    Compiling duplex v0.1.0 (/source)
Dec 05 17:39:09.452 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.452 INFO [stderr]    --> src/cube.rs:546:9
Dec 05 17:39:09.452 INFO [stderr]     |
Dec 05 17:39:09.452 INFO [stderr] 546 |         write!(f, "{} ", self.corners[0]);
Dec 05 17:39:09.452 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.452 INFO [stderr]     |
Dec 05 17:39:09.452 INFO [stderr]     = note: #[warn(unused_must_use)] on by default
Dec 05 17:39:09.452 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.452 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.452 INFO [stderr] 
Dec 05 17:39:09.452 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.452 INFO [stderr]    --> src/cube.rs:547:9
Dec 05 17:39:09.452 INFO [stderr]     |
Dec 05 17:39:09.453 INFO [stderr] 547 |         write!(f, "{} ", self.edges[0]);
Dec 05 17:39:09.453 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.453 INFO [stderr]     |
Dec 05 17:39:09.453 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.453 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.453 INFO [stderr] 
Dec 05 17:39:09.453 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.453 INFO [stderr]    --> src/cube.rs:548:9
Dec 05 17:39:09.453 INFO [stderr]     |
Dec 05 17:39:09.453 INFO [stderr] 548 |         write!(f, "{}\n", self.corners[1]);
Dec 05 17:39:09.453 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.453 INFO [stderr]     |
Dec 05 17:39:09.453 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.453 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.453 INFO [stderr] 
Dec 05 17:39:09.453 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.453 INFO [stderr]    --> src/cube.rs:549:9
Dec 05 17:39:09.453 INFO [stderr]     |
Dec 05 17:39:09.453 INFO [stderr] 549 |         write!(f, "{}  ", self.edges[3]);
Dec 05 17:39:09.453 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.453 INFO [stderr]     |
Dec 05 17:39:09.453 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.453 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.453 INFO [stderr] 
Dec 05 17:39:09.453 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.453 INFO [stderr]    --> src/cube.rs:550:9
Dec 05 17:39:09.453 INFO [stderr]     |
Dec 05 17:39:09.453 INFO [stderr] 550 |         write!(f, "{:?}  ", self.centres[0]);
Dec 05 17:39:09.453 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.453 INFO [stderr]     |
Dec 05 17:39:09.453 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.453 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.453 INFO [stderr] 
Dec 05 17:39:09.453 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.453 INFO [stderr]    --> src/cube.rs:551:9
Dec 05 17:39:09.453 INFO [stderr]     |
Dec 05 17:39:09.453 INFO [stderr] 551 |         write!(f, "{}  \n", self.edges[1]);
Dec 05 17:39:09.453 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.453 INFO [stderr]     |
Dec 05 17:39:09.453 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.453 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.453 INFO [stderr] 
Dec 05 17:39:09.453 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.453 INFO [stderr]    --> src/cube.rs:552:9
Dec 05 17:39:09.453 INFO [stderr]     |
Dec 05 17:39:09.453 INFO [stderr] 552 |         write!(f, "{} ", self.corners[3]);
Dec 05 17:39:09.453 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.453 INFO [stderr]     |
Dec 05 17:39:09.453 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.454 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.454 INFO [stderr] 
Dec 05 17:39:09.454 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.454 INFO [stderr]    --> src/cube.rs:553:9
Dec 05 17:39:09.454 INFO [stderr]     |
Dec 05 17:39:09.454 INFO [stderr] 553 |         write!(f, "{} ", self.edges[2]);
Dec 05 17:39:09.454 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.454 INFO [stderr]     |
Dec 05 17:39:09.454 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.454 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.454 INFO [stderr] 
Dec 05 17:39:09.454 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.454 INFO [stderr]    --> src/cube.rs:554:9
Dec 05 17:39:09.454 INFO [stderr]     |
Dec 05 17:39:09.454 INFO [stderr] 554 |         write!(f, "{}\n", self.corners[2]);
Dec 05 17:39:09.454 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.454 INFO [stderr]     |
Dec 05 17:39:09.454 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.454 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.454 INFO [stderr] 
Dec 05 17:39:09.454 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.454 INFO [stderr]    --> src/cube.rs:555:9
Dec 05 17:39:09.454 INFO [stderr]     |
Dec 05 17:39:09.454 INFO [stderr] 555 |         write!(f, "--  -- --\n");
Dec 05 17:39:09.454 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.454 INFO [stderr]     |
Dec 05 17:39:09.454 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.454 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.454 INFO [stderr] 
Dec 05 17:39:09.454 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.454 INFO [stderr]    --> src/cube.rs:556:9
Dec 05 17:39:09.454 INFO [stderr]     |
Dec 05 17:39:09.454 INFO [stderr] 556 |         write!(f, "{}  ", self.edges[4]);
Dec 05 17:39:09.454 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.454 INFO [stderr]     |
Dec 05 17:39:09.454 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.454 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.454 INFO [stderr] 
Dec 05 17:39:09.454 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.454 INFO [stderr]    --> src/cube.rs:557:9
Dec 05 17:39:09.454 INFO [stderr]     |
Dec 05 17:39:09.454 INFO [stderr] 557 |         write!(f, "{:?}  ", self.centres[2]);
Dec 05 17:39:09.454 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.454 INFO [stderr]     |
Dec 05 17:39:09.454 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.455 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.455 INFO [stderr] 
Dec 05 17:39:09.455 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.455 INFO [stderr]    --> src/cube.rs:558:9
Dec 05 17:39:09.455 INFO [stderr]     |
Dec 05 17:39:09.455 INFO [stderr] 558 |         write!(f, "{}  \n", self.edges[5]);
Dec 05 17:39:09.455 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.455 INFO [stderr]     |
Dec 05 17:39:09.455 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.455 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.455 INFO [stderr] 
Dec 05 17:39:09.455 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.455 INFO [stderr]    --> src/cube.rs:559:9
Dec 05 17:39:09.455 INFO [stderr]     |
Dec 05 17:39:09.455 INFO [stderr] 559 |         write!(f, "{:?}       ", self.centres[5]);
Dec 05 17:39:09.455 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.455 INFO [stderr]     |
Dec 05 17:39:09.455 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.455 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.455 INFO [stderr] 
Dec 05 17:39:09.455 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.455 INFO [stderr]    --> src/cube.rs:560:9
Dec 05 17:39:09.455 INFO [stderr]     |
Dec 05 17:39:09.455 INFO [stderr] 560 |         write!(f, "{:?}\n", self.centres[3]);
Dec 05 17:39:09.455 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.455 INFO [stderr]     |
Dec 05 17:39:09.455 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.455 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.455 INFO [stderr] 
Dec 05 17:39:09.455 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.455 INFO [stderr]    --> src/cube.rs:561:9
Dec 05 17:39:09.455 INFO [stderr]     |
Dec 05 17:39:09.455 INFO [stderr] 561 |         write!(f, "{}  ", self.edges[7]);
Dec 05 17:39:09.455 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.455 INFO [stderr]     |
Dec 05 17:39:09.455 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.455 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.455 INFO [stderr] 
Dec 05 17:39:09.455 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.455 INFO [stderr]    --> src/cube.rs:562:9
Dec 05 17:39:09.456 INFO [stderr]     |
Dec 05 17:39:09.456 INFO [stderr] 562 |         write!(f, "{:?}  ", self.centres[4]);
Dec 05 17:39:09.456 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.456 INFO [stderr]     |
Dec 05 17:39:09.456 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.456 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.456 INFO [stderr] 
Dec 05 17:39:09.456 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.456 INFO [stderr]    --> src/cube.rs:563:9
Dec 05 17:39:09.456 INFO [stderr]     |
Dec 05 17:39:09.456 INFO [stderr] 563 |         write!(f, "{}\n", self.edges[6]);
Dec 05 17:39:09.456 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.456 INFO [stderr]     |
Dec 05 17:39:09.456 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.456 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.456 INFO [stderr] 
Dec 05 17:39:09.456 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.456 INFO [stderr]    --> src/cube.rs:564:9
Dec 05 17:39:09.456 INFO [stderr]     |
Dec 05 17:39:09.456 INFO [stderr] 564 |         write!(f, "--  -- --\n");
Dec 05 17:39:09.456 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.456 INFO [stderr]     |
Dec 05 17:39:09.456 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.456 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.456 INFO [stderr] 
Dec 05 17:39:09.456 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.456 INFO [stderr]    --> src/cube.rs:565:9
Dec 05 17:39:09.456 INFO [stderr]     |
Dec 05 17:39:09.456 INFO [stderr] 565 |         write!(f, "{} ", self.corners[4]);
Dec 05 17:39:09.456 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.456 INFO [stderr]     |
Dec 05 17:39:09.456 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.456 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.456 INFO [stderr] 
Dec 05 17:39:09.456 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.456 INFO [stderr]    --> src/cube.rs:566:9
Dec 05 17:39:09.456 INFO [stderr]     |
Dec 05 17:39:09.456 INFO [stderr] 566 |         write!(f, "{} ", self.edges[8]);
Dec 05 17:39:09.456 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.456 INFO [stderr]     |
Dec 05 17:39:09.456 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.456 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.456 INFO [stderr] 
Dec 05 17:39:09.456 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.456 INFO [stderr]    --> src/cube.rs:567:9
Dec 05 17:39:09.456 INFO [stderr]     |
Dec 05 17:39:09.456 INFO [stderr] 567 |         write!(f, "{}\n", self.corners[5]);
Dec 05 17:39:09.456 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.456 INFO [stderr]     |
Dec 05 17:39:09.456 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.456 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.456 INFO [stderr] 
Dec 05 17:39:09.456 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.456 INFO [stderr]    --> src/cube.rs:568:9
Dec 05 17:39:09.456 INFO [stderr]     |
Dec 05 17:39:09.456 INFO [stderr] 568 |         write!(f, "{}  ", self.edges[11]);
Dec 05 17:39:09.456 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.456 INFO [stderr]     |
Dec 05 17:39:09.456 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.456 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.456 INFO [stderr] 
Dec 05 17:39:09.456 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.456 INFO [stderr]    --> src/cube.rs:569:9
Dec 05 17:39:09.456 INFO [stderr]     |
Dec 05 17:39:09.456 INFO [stderr] 569 |         write!(f, "{:?}  ", self.centres[1]);
Dec 05 17:39:09.456 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.456 INFO [stderr]     |
Dec 05 17:39:09.456 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.456 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.456 INFO [stderr] 
Dec 05 17:39:09.456 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.456 INFO [stderr]    --> src/cube.rs:570:9
Dec 05 17:39:09.456 INFO [stderr]     |
Dec 05 17:39:09.456 INFO [stderr] 570 |         write!(f, "{}  \n", self.edges[9]);
Dec 05 17:39:09.456 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.456 INFO [stderr]     |
Dec 05 17:39:09.456 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.456 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.456 INFO [stderr] 
Dec 05 17:39:09.456 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.456 INFO [stderr]    --> src/cube.rs:571:9
Dec 05 17:39:09.456 INFO [stderr]     |
Dec 05 17:39:09.456 INFO [stderr] 571 |         write!(f, "{} ", self.corners[7]);
Dec 05 17:39:09.456 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.456 INFO [stderr]     |
Dec 05 17:39:09.456 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.456 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.456 INFO [stderr] 
Dec 05 17:39:09.457 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 05 17:39:09.457 INFO [stderr]    --> src/cube.rs:572:9
Dec 05 17:39:09.457 INFO [stderr]     |
Dec 05 17:39:09.457 INFO [stderr] 572 |         write!(f, "{} ", self.edges[10]);
Dec 05 17:39:09.457 INFO [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 05 17:39:09.457 INFO [stderr]     |
Dec 05 17:39:09.457 INFO [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
Dec 05 17:39:09.457 INFO [stderr]     = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
Dec 05 17:39:09.457 INFO [stderr] 
Dec 05 17:39:09.765 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.15s
Dec 05 17:39:09.768 INFO [stderr] su: No module specific data is present
Dec 05 17:39:10.170 INFO running `"docker" "inspect" "1c37493496d3cd8a6f599cb2500c679c129bb3b702c811ff42b2b73ce4b8347c"`
Dec 05 17:39:10.234 INFO running `"docker" "rm" "-f" "1c37493496d3cd8a6f599cb2500c679c129bb3b702c811ff42b2b73ce4b8347c"`
Dec 05 17:39:10.323 INFO [stdout] 1c37493496d3cd8a6f599cb2500c679c129bb3b702c811ff42b2b73ce4b8347c
Dec 05 17:39:10.325 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-5/master#906deae0790bd18681b937fe9a141a3c26cf1855:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-5/pr-56514/master#906deae0790bd18681b937fe9a141a3c26cf1855:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +906deae0790bd18681b937fe9a141a3c26cf1855-alt test --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 05 17:39:10.507 INFO [stdout] 95b3a5fc07f3799c4bb581f6befb1fbf46146366324b5fe2eaf3cafe0890591d
Dec 05 17:39:10.510 INFO running `"docker" "start" "-a" "95b3a5fc07f3799c4bb581f6befb1fbf46146366324b5fe2eaf3cafe0890591d"`
Dec 05 17:39:11.092 INFO [stderr] usermod: no changes
Dec 05 17:39:11.140 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
Dec 05 17:39:11.156 INFO [stderr]      Running /target/debug/deps/duplex-66213dbed456d3b6
Dec 05 17:39:11.159 INFO [stdout] 
Dec 05 17:39:11.159 INFO [stdout] running 0 tests
Dec 05 17:39:11.159 INFO [stdout] 
Dec 05 17:39:11.159 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 05 17:39:11.159 INFO [stdout] 
Dec 05 17:39:11.159 INFO [stderr] su: No module specific data is present
Dec 05 17:39:11.628 INFO running `"docker" "inspect" "95b3a5fc07f3799c4bb581f6befb1fbf46146366324b5fe2eaf3cafe0890591d"`
Dec 05 17:39:11.866 INFO running `"docker" "rm" "-f" "95b3a5fc07f3799c4bb581f6befb1fbf46146366324b5fe2eaf3cafe0890591d"`
Dec 05 17:39:12.116 INFO [stdout] 95b3a5fc07f3799c4bb581f6befb1fbf46146366324b5fe2eaf3cafe0890591d