[INFO] crate big_unsigned_ints 0.1.5 is already in cache
[INFO] testing big_unsigned_ints-0.1.5 against try#03a1ea71b075ab964b5278bc6e74cd6c52c36ee0 for pr-74409
[INFO] extracting crate big_unsigned_ints 0.1.5 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate big_unsigned_ints 0.1.5 on toolchain 03a1ea71b075ab964b5278bc6e74cd6c52c36ee0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate big_unsigned_ints 0.1.5
[INFO] finished tweaking crates.io crate big_unsigned_ints 0.1.5
[INFO] tweaked toml for crates.io crate big_unsigned_ints 0.1.5 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] crate crates.io crate big_unsigned_ints 0.1.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "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-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 64306abb92f602b3ef37f8ec3c14205f94eda322ac81fc50011b2226e1f50553
[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" "64306abb92f602b3ef37f8ec3c14205f94eda322ac81fc50011b2226e1f50553", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "64306abb92f602b3ef37f8ec3c14205f94eda322ac81fc50011b2226e1f50553", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "64306abb92f602b3ef37f8ec3c14205f94eda322ac81fc50011b2226e1f50553", kill_on_drop: false }`
[INFO] [stdout] 64306abb92f602b3ef37f8ec3c14205f94eda322ac81fc50011b2226e1f50553
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=forbid" "-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:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4fc79f1701b94391bb5650bae248e2af7a90ca6bea2c80254ed5c4b21ce96905
[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" "4fc79f1701b94391bb5650bae248e2af7a90ca6bea2c80254ed5c4b21ce96905", kill_on_drop: false }`
[INFO] [stderr]    Compiling big_unsigned_ints v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `core::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:121:13
[INFO] [stdout]     |
[INFO] [stdout] 121 |             write!(f, "0x{:X} ", x[i]);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `core::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:174:13
[INFO] [stdout]     |
[INFO] [stdout] 174 |             write!(f, "0x{:X} ", x[i]);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `core::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:227:13
[INFO] [stdout]     |
[INFO] [stdout] 227 |             write!(f, "0x{:X} ", x[i]);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `core::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:278:13
[INFO] [stdout]     |
[INFO] [stdout] 278 |             write!(f, "0x{:X} ", x[i]);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `core::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:330:13
[INFO] [stdout]     |
[INFO] [stdout] 330 |             write!(f, "0x{:X} ", x[i]);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `Command { std: "docker" "inspect" "4fc79f1701b94391bb5650bae248e2af7a90ca6bea2c80254ed5c4b21ce96905", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4fc79f1701b94391bb5650bae248e2af7a90ca6bea2c80254ed5c4b21ce96905", kill_on_drop: false }`
[INFO] [stdout] 4fc79f1701b94391bb5650bae248e2af7a90ca6bea2c80254ed5c4b21ce96905
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=forbid" "-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:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 65fc15f94b7593898a0db5af2b37ffab6de0fdf3a61b2149e9a4c93139fcf73e
[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" "65fc15f94b7593898a0db5af2b37ffab6de0fdf3a61b2149e9a4c93139fcf73e", kill_on_drop: false }`
[INFO] [stdout] warning: unused `core::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:121:13
[INFO] [stdout]     |
[INFO] [stdout] 121 |             write!(f, "0x{:X} ", x[i]);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling big_unsigned_ints v0.1.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `core::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:174:13
[INFO] [stdout]     |
[INFO] [stdout] 174 |             write!(f, "0x{:X} ", x[i]);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `core::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:227:13
[INFO] [stdout]     |
[INFO] [stdout] 227 |             write!(f, "0x{:X} ", x[i]);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `core::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:278:13
[INFO] [stdout]     |
[INFO] [stdout] 278 |             write!(f, "0x{:X} ", x[i]);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `core::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:330:13
[INFO] [stdout]     |
[INFO] [stdout] 330 |             write!(f, "0x{:X} ", x[i]);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `core::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:121:13
[INFO] [stdout]     |
[INFO] [stdout] 121 |             write!(f, "0x{:X} ", x[i]);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `core::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:174:13
[INFO] [stdout]     |
[INFO] [stdout] 174 |             write!(f, "0x{:X} ", x[i]);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `core::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:227:13
[INFO] [stdout]     |
[INFO] [stdout] 227 |             write!(f, "0x{:X} ", x[i]);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `core::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:278:13
[INFO] [stdout]     |
[INFO] [stdout] 278 |             write!(f, "0x{:X} ", x[i]);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `core::result::Result` that must be used
[INFO] [stdout]    --> src/lib.rs:330:13
[INFO] [stdout]     |
[INFO] [stdout] 330 |             write!(f, "0x{:X} ", x[i]);
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.74s
[INFO] running `Command { std: "docker" "inspect" "65fc15f94b7593898a0db5af2b37ffab6de0fdf3a61b2149e9a4c93139fcf73e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65fc15f94b7593898a0db5af2b37ffab6de0fdf3a61b2149e9a4c93139fcf73e", kill_on_drop: false }`
[INFO] [stdout] 65fc15f94b7593898a0db5af2b37ffab6de0fdf3a61b2149e9a4c93139fcf73e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=forbid" "-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:d9fbb4e2287ab3795bdefaf705efb7541a8875c13bce71e067d6b01dc5ed759b" "/opt/rustwide/cargo-home/bin/cargo" "+03a1ea71b075ab964b5278bc6e74cd6c52c36ee0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 0b7ffdbf7ea1c1bb714d2a5ec4ecc1738cbf99f788166604e0daf8d449383899
[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" "0b7ffdbf7ea1c1bb714d2a5ec4ecc1738cbf99f788166604e0daf8d449383899", kill_on_drop: false }`
[INFO] [stderr] warning: unused `core::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:121:13
[INFO] [stderr]     |
[INFO] [stderr] 121 |             write!(f, "0x{:X} ", x[i]);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `core::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:121:13
[INFO] [stderr]     |
[INFO] [stderr] 121 |             write!(f, "0x{:X} ", x[i]);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `core::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:174:13
[INFO] [stderr]     |
[INFO] [stderr] 174 |             write!(f, "0x{:X} ", x[i]);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `core::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:174:13
[INFO] [stderr]     |
[INFO] [stderr] 174 |             write!(f, "0x{:X} ", x[i]);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `core::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:227:13
[INFO] [stderr]     |
[INFO] [stderr] 227 |             write!(f, "0x{:X} ", x[i]);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `core::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:227:13
[INFO] [stderr]     |
[INFO] [stderr] 227 |             write!(f, "0x{:X} ", x[i]);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `core::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:278:13
[INFO] [stderr]     |
[INFO] [stderr] 278 |             write!(f, "0x{:X} ", x[i]);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `core::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:330:13
[INFO] [stderr]     |
[INFO] [stderr] 330 |             write!(f, "0x{:X} ", x[i]);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused `core::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:278:13
[INFO] [stderr]     |
[INFO] [stderr] 278 |             write!(f, "0x{:X} ", x[i]);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused `core::result::Result` that must be used
[INFO] [stderr]    --> src/lib.rs:330:13
[INFO] [stderr]     |
[INFO] [stderr] 330 |             write!(f, "0x{:X} ", x[i]);
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: 5 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/big_unsigned_ints-0d07c05ddbed4a05
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/integration_tests-716bc17e03d0ab51
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test instantiate_u256 ... ok
[INFO] [stdout] test bytes_to_u256 ... ok
[INFO] [stdout] test instantiate_u384 ... ok
[INFO] [stdout] test u256_into_bytes ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests big_unsigned_ints
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "0b7ffdbf7ea1c1bb714d2a5ec4ecc1738cbf99f788166604e0daf8d449383899", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0b7ffdbf7ea1c1bb714d2a5ec4ecc1738cbf99f788166604e0daf8d449383899", kill_on_drop: false }`
[INFO] [stdout] 0b7ffdbf7ea1c1bb714d2a5ec4ecc1738cbf99f788166604e0daf8d449383899