Dec 02 01:28:12.988 INFO testing agilestacks/object-spam against master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61 for beta-1.31-5
Dec 02 01:28:12.988 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-2/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/beta-1.31-5/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/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 +8940af3cea4a9a9deabcaf843b2f8cad9a83fc61-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 02 01:28:13.588 INFO [stdout] 700507decfcf1cf983c6f530d95d1c7714e15932490a45112aaa4e9bc820dbb9
Dec 02 01:28:13.590 INFO running `"docker" "start" "-a" "700507decfcf1cf983c6f530d95d1c7714e15932490a45112aaa4e9bc820dbb9"`
Dec 02 01:28:15.946 INFO [stderr] usermod: no changes
Dec 02 01:28:16.356 INFO [stderr]    Compiling quantiles v0.7.1
Dec 02 01:28:16.356 INFO [stderr]    Compiling human-size v0.4.0
Dec 02 01:28:16.365 INFO [stderr]    Compiling crossbeam-epoch v0.6.1
Dec 02 01:28:19.929 INFO [stderr]    Compiling crossbeam-deque v0.6.2
Dec 02 01:28:20.916 INFO [stderr]    Compiling tokio-threadpool v0.1.8
Dec 02 01:28:25.059 INFO [stderr]    Compiling tokio-fs v0.1.4
Dec 02 01:28:27.563 INFO [stderr]    Compiling tokio v0.1.11
Dec 02 01:28:31.787 INFO [stderr]    Compiling hyper v0.12.14
Dec 02 01:28:41.486 INFO [stderr]    Compiling hyper-tls v0.3.1
Dec 02 01:28:41.486 INFO [stderr]    Compiling rusoto_credential v0.14.0
Dec 02 01:28:57.215 INFO [stderr]    Compiling rusoto_core v0.35.0
Dec 02 01:29:11.585 INFO [stderr]    Compiling rusoto_s3 v0.35.0
Dec 02 01:29:40.902 INFO [stderr]    Compiling object-spam v0.1.0 (/source)
Dec 02 01:29:46.286 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 01:29:46.286 INFO [stderr]   --> src/stats.rs:71:9
Dec 02 01:29:46.286 INFO [stderr]    |
Dec 02 01:29:46.286 INFO [stderr] 71 |         writeln!(f, "Timing results for {}", self.category);
Dec 02 01:29:46.286 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 01:29:46.286 INFO [stderr]    |
Dec 02 01:29:46.286 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 02 01:29:46.286 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 01:29:46.286 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 02 01:29:46.286 INFO [stderr] 
Dec 02 01:29:46.286 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 01:29:46.286 INFO [stderr]   --> src/stats.rs:72:9
Dec 02 01:29:46.286 INFO [stderr]    |
Dec 02 01:29:46.286 INFO [stderr] 72 |         writeln!(f, "Bandwidth = {:.3} MB/sec", self.bytes / self.sum as f64 / (1024.0 * 1024.0));
Dec 02 01:29:46.286 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 01:29:46.287 INFO [stderr]    |
Dec 02 01:29:46.287 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 01:29:46.287 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 02 01:29:46.287 INFO [stderr] 
Dec 02 01:29:46.287 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 01:29:46.287 INFO [stderr]   --> src/stats.rs:73:9
Dec 02 01:29:46.287 INFO [stderr]    |
Dec 02 01:29:46.287 INFO [stderr] 73 |         writeln!(f, "Mean = {:.3}", (self.max - self.min) / 2_f64);
Dec 02 01:29:46.287 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 01:29:46.287 INFO [stderr]    |
Dec 02 01:29:46.287 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 01:29:46.287 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 02 01:29:46.293 INFO [stderr] 
Dec 02 01:29:46.293 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 01:29:46.293 INFO [stderr]   --> src/stats.rs:74:9
Dec 02 01:29:46.293 INFO [stderr]    |
Dec 02 01:29:46.293 INFO [stderr] 74 |         writeln!(f, "Average = {:.3}", self.sum / self.num_samples as f64);
Dec 02 01:29:46.293 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 01:29:46.293 INFO [stderr]    |
Dec 02 01:29:46.293 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 01:29:46.293 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 02 01:29:46.293 INFO [stderr] 
Dec 02 01:29:46.293 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 01:29:46.293 INFO [stderr]   --> src/stats.rs:75:9
Dec 02 01:29:46.293 INFO [stderr]    |
Dec 02 01:29:46.293 INFO [stderr] 75 |         writeln!(f, "Max = {:.3}", self.max);
Dec 02 01:29:46.293 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 01:29:46.293 INFO [stderr]    |
Dec 02 01:29:46.293 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 01:29:46.293 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 02 01:29:46.293 INFO [stderr] 
Dec 02 01:29:46.293 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 01:29:46.293 INFO [stderr]   --> src/stats.rs:76:9
Dec 02 01:29:46.293 INFO [stderr]    |
Dec 02 01:29:46.293 INFO [stderr] 76 |         writeln!(f, "Min = {:.3}", self.min);
Dec 02 01:29:46.293 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 01:29:46.293 INFO [stderr]    |
Dec 02 01:29:46.293 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 01:29:46.293 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 02 01:29:46.293 INFO [stderr] 
Dec 02 01:29:46.293 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 01:29:46.293 INFO [stderr]   --> src/stats.rs:77:9
Dec 02 01:29:46.293 INFO [stderr]    |
Dec 02 01:29:46.293 INFO [stderr] 77 |         writeln!(f, "50th Percenile value = {:.3}", self.histogram[FIFTY]);
Dec 02 01:29:46.293 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 01:29:46.293 INFO [stderr]    |
Dec 02 01:29:46.293 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 01:29:46.293 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 02 01:29:46.293 INFO [stderr] 
Dec 02 01:29:46.293 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 01:29:46.293 INFO [stderr]   --> src/stats.rs:78:9
Dec 02 01:29:46.293 INFO [stderr]    |
Dec 02 01:29:46.293 INFO [stderr] 78 |         writeln!(f, "70th Percenile value = {:.3}", self.histogram[SEVENTY]);
Dec 02 01:29:46.293 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 01:29:46.293 INFO [stderr]    |
Dec 02 01:29:46.293 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 01:29:46.293 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 02 01:29:46.293 INFO [stderr] 
Dec 02 01:29:46.293 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 01:29:46.293 INFO [stderr]   --> src/stats.rs:79:9
Dec 02 01:29:46.293 INFO [stderr]    |
Dec 02 01:29:46.293 INFO [stderr] 79 |         writeln!(f, "90th Percenile value = {:.3}", self.histogram[NINETY]);
Dec 02 01:29:46.293 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 01:29:46.293 INFO [stderr]    |
Dec 02 01:29:46.293 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 01:29:46.293 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 02 01:29:46.293 INFO [stderr] 
Dec 02 01:29:46.293 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 01:29:46.293 INFO [stderr]   --> src/stats.rs:80:9
Dec 02 01:29:46.293 INFO [stderr]    |
Dec 02 01:29:46.293 INFO [stderr] 80 |         writeln!(f, "95th Percenile value = {:.3}", self.histogram[NINETY5]);
Dec 02 01:29:46.293 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 01:29:46.293 INFO [stderr]    |
Dec 02 01:29:46.293 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 01:29:46.293 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 02 01:29:46.293 INFO [stderr] 
Dec 02 01:29:54.457 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 38s
Dec 02 01:29:54.474 INFO [stderr] su: No module specific data is present
Dec 02 01:29:55.265 INFO running `"docker" "inspect" "700507decfcf1cf983c6f530d95d1c7714e15932490a45112aaa4e9bc820dbb9"`
Dec 02 01:29:55.560 INFO running `"docker" "rm" "-f" "700507decfcf1cf983c6f530d95d1c7714e15932490a45112aaa4e9bc820dbb9"`
Dec 02 01:29:55.891 INFO [stdout] 700507decfcf1cf983c6f530d95d1c7714e15932490a45112aaa4e9bc820dbb9
Dec 02 01:29:55.903 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-2/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/beta-1.31-5/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/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 +8940af3cea4a9a9deabcaf843b2f8cad9a83fc61-alt test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 02 01:29:56.353 INFO [stdout] 2b6b30146f983557ef60267c87302f04e6ad496bf5edc576595c6d907e87e715
Dec 02 01:29:56.356 INFO running `"docker" "start" "-a" "2b6b30146f983557ef60267c87302f04e6ad496bf5edc576595c6d907e87e715"`
Dec 02 01:29:57.510 INFO [stderr] usermod: no changes
Dec 02 01:29:57.779 INFO [stderr]    Compiling object-spam v0.1.0 (/source)
Dec 02 01:30:03.227 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 01:30:03.227 INFO [stderr]   --> src/stats.rs:71:9
Dec 02 01:30:03.227 INFO [stderr]    |
Dec 02 01:30:03.227 INFO [stderr] 71 |         writeln!(f, "Timing results for {}", self.category);
Dec 02 01:30:03.227 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 01:30:03.227 INFO [stderr]    |
Dec 02 01:30:03.227 INFO [stderr]    = note: #[warn(unused_must_use)] on by default
Dec 02 01:30:03.227 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 01:30:03.227 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 02 01:30:03.227 INFO [stderr] 
Dec 02 01:30:03.227 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 01:30:03.227 INFO [stderr]   --> src/stats.rs:72:9
Dec 02 01:30:03.227 INFO [stderr]    |
Dec 02 01:30:03.227 INFO [stderr] 72 |         writeln!(f, "Bandwidth = {:.3} MB/sec", self.bytes / self.sum as f64 / (1024.0 * 1024.0));
Dec 02 01:30:03.227 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 01:30:03.227 INFO [stderr]    |
Dec 02 01:30:03.227 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 01:30:03.227 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 02 01:30:03.227 INFO [stderr] 
Dec 02 01:30:03.227 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 01:30:03.227 INFO [stderr]   --> src/stats.rs:73:9
Dec 02 01:30:03.227 INFO [stderr]    |
Dec 02 01:30:03.227 INFO [stderr] 73 |         writeln!(f, "Mean = {:.3}", (self.max - self.min) / 2_f64);
Dec 02 01:30:03.227 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 01:30:03.227 INFO [stderr]    |
Dec 02 01:30:03.227 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 01:30:03.227 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 02 01:30:03.227 INFO [stderr] 
Dec 02 01:30:03.227 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 01:30:03.227 INFO [stderr]   --> src/stats.rs:74:9
Dec 02 01:30:03.227 INFO [stderr]    |
Dec 02 01:30:03.227 INFO [stderr] 74 |         writeln!(f, "Average = {:.3}", self.sum / self.num_samples as f64);
Dec 02 01:30:03.227 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 01:30:03.228 INFO [stderr]    |
Dec 02 01:30:03.228 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 01:30:03.228 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 02 01:30:03.228 INFO [stderr] 
Dec 02 01:30:03.228 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 01:30:03.228 INFO [stderr]   --> src/stats.rs:75:9
Dec 02 01:30:03.228 INFO [stderr]    |
Dec 02 01:30:03.228 INFO [stderr] 75 |         writeln!(f, "Max = {:.3}", self.max);
Dec 02 01:30:03.228 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 01:30:03.228 INFO [stderr]    |
Dec 02 01:30:03.228 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 01:30:03.228 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 02 01:30:03.228 INFO [stderr] 
Dec 02 01:30:03.228 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 01:30:03.228 INFO [stderr]   --> src/stats.rs:76:9
Dec 02 01:30:03.228 INFO [stderr]    |
Dec 02 01:30:03.228 INFO [stderr] 76 |         writeln!(f, "Min = {:.3}", self.min);
Dec 02 01:30:03.228 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 01:30:03.228 INFO [stderr]    |
Dec 02 01:30:03.228 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 01:30:03.228 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 02 01:30:03.228 INFO [stderr] 
Dec 02 01:30:03.228 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 01:30:03.228 INFO [stderr]   --> src/stats.rs:77:9
Dec 02 01:30:03.228 INFO [stderr]    |
Dec 02 01:30:03.228 INFO [stderr] 77 |         writeln!(f, "50th Percenile value = {:.3}", self.histogram[FIFTY]);
Dec 02 01:30:03.228 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 01:30:03.228 INFO [stderr]    |
Dec 02 01:30:03.228 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 01:30:03.228 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 02 01:30:03.228 INFO [stderr] 
Dec 02 01:30:03.228 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 01:30:03.228 INFO [stderr]   --> src/stats.rs:78:9
Dec 02 01:30:03.228 INFO [stderr]    |
Dec 02 01:30:03.228 INFO [stderr] 78 |         writeln!(f, "70th Percenile value = {:.3}", self.histogram[SEVENTY]);
Dec 02 01:30:03.228 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 01:30:03.228 INFO [stderr]    |
Dec 02 01:30:03.228 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 01:30:03.228 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 02 01:30:03.228 INFO [stderr] 
Dec 02 01:30:03.228 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 01:30:03.228 INFO [stderr]   --> src/stats.rs:79:9
Dec 02 01:30:03.228 INFO [stderr]    |
Dec 02 01:30:03.228 INFO [stderr] 79 |         writeln!(f, "90th Percenile value = {:.3}", self.histogram[NINETY]);
Dec 02 01:30:03.228 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 01:30:03.228 INFO [stderr]    |
Dec 02 01:30:03.228 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 01:30:03.228 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 02 01:30:03.228 INFO [stderr] 
Dec 02 01:30:03.228 INFO [stderr] warning: unused `std::result::Result` that must be used
Dec 02 01:30:03.228 INFO [stderr]   --> src/stats.rs:80:9
Dec 02 01:30:03.228 INFO [stderr]    |
Dec 02 01:30:03.228 INFO [stderr] 80 |         writeln!(f, "95th Percenile value = {:.3}", self.histogram[NINETY5]);
Dec 02 01:30:03.228 INFO [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 01:30:03.228 INFO [stderr]    |
Dec 02 01:30:03.228 INFO [stderr]    = note: this `Result` may be an `Err` variant, which should be handled
Dec 02 01:30:03.228 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 02 01:30:03.228 INFO [stderr] 
Dec 02 01:30:04.140 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.61s
Dec 02 01:30:04.171 INFO [stderr] su: No module specific data is present
Dec 02 01:30:05.411 INFO running `"docker" "inspect" "2b6b30146f983557ef60267c87302f04e6ad496bf5edc576595c6d907e87e715"`
Dec 02 01:30:05.629 INFO running `"docker" "rm" "-f" "2b6b30146f983557ef60267c87302f04e6ad496bf5edc576595c6d907e87e715"`
Dec 02 01:30:05.991 INFO [stdout] 2b6b30146f983557ef60267c87302f04e6ad496bf5edc576595c6d907e87e715
Dec 02 01:30:05.997 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-2/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/beta-1.31-5/master#8940af3cea4a9a9deabcaf843b2f8cad9a83fc61:/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 +8940af3cea4a9a9deabcaf843b2f8cad9a83fc61-alt test --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 02 01:30:06.477 INFO [stdout] 64baa2409df4db69783879a1c23c701ddd5fd64c07468f65b5db20b3fc4525f4
Dec 02 01:30:06.479 INFO running `"docker" "start" "-a" "64baa2409df4db69783879a1c23c701ddd5fd64c07468f65b5db20b3fc4525f4"`
Dec 02 01:30:07.756 INFO [stderr] usermod: no changes
Dec 02 01:30:08.015 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.23s
Dec 02 01:30:08.047 INFO [stderr]      Running /target/debug/deps/object_spam-e9bd23e28ff0ce6b
Dec 02 01:30:08.047 INFO [stdout] 
Dec 02 01:30:08.047 INFO [stderr] su: No module specific data is present
Dec 02 01:30:08.047 INFO [stdout] running 0 tests
Dec 02 01:30:08.047 INFO [stdout] 
Dec 02 01:30:08.047 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 02 01:30:08.047 INFO [stdout] 
Dec 02 01:30:08.711 INFO running `"docker" "inspect" "64baa2409df4db69783879a1c23c701ddd5fd64c07468f65b5db20b3fc4525f4"`
Dec 02 01:30:08.941 INFO running `"docker" "rm" "-f" "64baa2409df4db69783879a1c23c701ddd5fd64c07468f65b5db20b3fc4525f4"`
Dec 02 01:30:09.098 INFO [stdout] 64baa2409df4db69783879a1c23c701ddd5fd64c07468f65b5db20b3fc4525f4
