[INFO] crate byte-mutator 0.2.0 is already in cache
[INFO] testing byte-mutator-0.2.0 against 1.44.0 for beta-1.45-1
[INFO] extracting crate byte-mutator 0.2.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate byte-mutator 0.2.0 on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate byte-mutator 0.2.0
[INFO] finished tweaking crates.io crate byte-mutator 0.2.0
[INFO] tweaked toml for crates.io crate byte-mutator 0.2.0 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=warn" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stdout] c241cf321eec4dac082810ea867e105c23a090e65a696cb27b705d6100a5e4a1
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "c241cf321eec4dac082810ea867e105c23a090e65a696cb27b705d6100a5e4a1"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling arrayvec v0.5.1
[INFO] [stderr]    Compiling toml v0.5.6
[INFO] [stderr]    Compiling byte-mutator v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `Iterations`
[INFO] [stderr]  --> src/fuzz_config.rs:5:13
[INFO] [stderr]   |
[INFO] [stderr] 5 | use crate::{Iterations, Stage};
[INFO] [stderr]   |             ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.62s
[INFO] running `"docker" "inspect" "c241cf321eec4dac082810ea867e105c23a090e65a696cb27b705d6100a5e4a1"`
[INFO] running `"docker" "rm" "-f" "c241cf321eec4dac082810ea867e105c23a090e65a696cb27b705d6100a5e4a1"`
[INFO] [stdout] c241cf321eec4dac082810ea867e105c23a090e65a696cb27b705d6100a5e4a1
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=warn" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] fbc795c6204fbd8bb0c4d8e602060594efabec3ed24600c87f05fd7731a8e217
[INFO] running `"docker" "start" "-a" "fbc795c6204fbd8bb0c4d8e602060594efabec3ed24600c87f05fd7731a8e217"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling byte-mutator v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `Iterations`
[INFO] [stderr]  --> src/fuzz_config.rs:5:13
[INFO] [stderr]   |
[INFO] [stderr] 5 | use crate::{Iterations, Stage};
[INFO] [stderr]   |             ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Iterations`
[INFO] [stderr]  --> src/fuzz_config.rs:5:13
[INFO] [stderr]   |
[INFO] [stderr] 5 | use crate::{Iterations, Stage};
[INFO] [stderr]   |             ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> tests/tests.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let mut mutator = ByteMutator::new().with_stages(vec![Stage {
[INFO] [stderr]    |         ----^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.89s
[INFO] running `"docker" "inspect" "fbc795c6204fbd8bb0c4d8e602060594efabec3ed24600c87f05fd7731a8e217"`
[INFO] running `"docker" "rm" "-f" "fbc795c6204fbd8bb0c4d8e602060594efabec3ed24600c87f05fd7731a8e217"`
[INFO] [stdout] fbc795c6204fbd8bb0c4d8e602060594efabec3ed24600c87f05fd7731a8e217
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=warn" "-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" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 90ef48f6234f1ba3f337e9dfdaecf6fed90564c364bc9b54af320b776e58aa48
[INFO] running `"docker" "start" "-a" "90ef48f6234f1ba3f337e9dfdaecf6fed90564c364bc9b54af320b776e58aa48"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: unused import: `Iterations`
[INFO] [stderr]  --> src/fuzz_config.rs:5:13
[INFO] [stderr]   |
[INFO] [stderr] 5 | use crate::{Iterations, Stage};
[INFO] [stderr]   |             ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Iterations`
[INFO] [stderr]  --> src/fuzz_config.rs:5:13
[INFO] [stderr]   |
[INFO] [stderr] 5 | use crate::{Iterations, Stage};
[INFO] [stderr]   |             ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> tests/tests.rs:19:9
[INFO] [stderr]    |
[INFO] [stderr] 19 |     let mut mutator = ByteMutator::new().with_stages(vec![Stage {
[INFO] [stderr]    |         ----^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/byte_mutator-cc755116d0d4ff25
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test fuzz_config::tests::config_from_file ... ok
[INFO] [stdout] test fuzz_config::tests::config_from_string ... ok
[INFO] [stdout] test tests::mutator_stage ... ok
[INFO] [stdout] test mutators::bitflipper::tests::flip_bit ... ok
[INFO] [stdout] test undo_buffer::tests::mutate_reset_range ... ok
[INFO] [stdout] test undo_buffer::tests::mutate_and_reset ... ok
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/tests-8ef616c1ff2c5a10
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test mutator_from_config ... ok
[INFO] [stdout] test mutator ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests byte-mutator
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs -  (line 7) ... ok
[INFO] [stdout] test src/mutators/mod.rs - mutators (line 4) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "90ef48f6234f1ba3f337e9dfdaecf6fed90564c364bc9b54af320b776e58aa48"`
[INFO] running `"docker" "rm" "-f" "90ef48f6234f1ba3f337e9dfdaecf6fed90564c364bc9b54af320b776e58aa48"`
[INFO] [stdout] 90ef48f6234f1ba3f337e9dfdaecf6fed90564c364bc9b54af320b776e58aa48