[INFO] crate cargo-mutagen 0.1.2 is already in cache
[INFO] testing cargo-mutagen-0.1.2 against beta-2020-06-03 for beta-1.45-1
[INFO] extracting crate cargo-mutagen 0.1.2 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate cargo-mutagen 0.1.2 on toolchain beta-2020-06-03
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate cargo-mutagen 0.1.2
[INFO] finished tweaking crates.io crate cargo-mutagen 0.1.2
[INFO] tweaked toml for crates.io crate cargo-mutagen 0.1.2 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+beta-2020-06-03" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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=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" "+beta-2020-06-03" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] c9f1f5047b0369dea27697fe299ef98c0fe96e951be460f189f03dc8f31831ed
[INFO] running `"docker" "start" "-a" "c9f1f5047b0369dea27697fe299ef98c0fe96e951be460f189f03dc8f31831ed"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling json v0.11.15
[INFO] [stderr]    Compiling wait-timeout v0.1.5
[INFO] [stderr]    Compiling cargo-mutagen v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:48:31
[INFO] [stderr]    |
[INFO] [stderr] 48 | fn run_mutations(runner: &mut Runner, list: &[String]) -> Result<()> {
[INFO] [stderr]    |                               ^^^^^^ help: use `dyn`: `dyn Runner`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:161:26
[INFO] [stderr]     |
[INFO] [stderr] 161 |         let runner: &mut Runner = if with_coverage {
[INFO] [stderr]     |                          ^^^^^^ help: use `dyn`: `dyn Runner`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.43s
[INFO] running `"docker" "inspect" "c9f1f5047b0369dea27697fe299ef98c0fe96e951be460f189f03dc8f31831ed"`
[INFO] running `"docker" "rm" "-f" "c9f1f5047b0369dea27697fe299ef98c0fe96e951be460f189f03dc8f31831ed"`
[INFO] [stdout] c9f1f5047b0369dea27697fe299ef98c0fe96e951be460f189f03dc8f31831ed
[INFO] running `"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=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" "+beta-2020-06-03" "test" "--frozen" "--no-run"`
[INFO] [stdout] 8a3e7ce47c2857f3c2615ed60196cbfe5ec77da645e65ff182ba28f5489a7e4f
[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" "8a3e7ce47c2857f3c2615ed60196cbfe5ec77da645e65ff182ba28f5489a7e4f"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling cargo-mutagen v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:48:31
[INFO] [stderr]    |
[INFO] [stderr] 48 | fn run_mutations(runner: &mut Runner, list: &[String]) -> Result<()> {
[INFO] [stderr]    |                               ^^^^^^ help: use `dyn`: `dyn Runner`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:161:26
[INFO] [stderr]     |
[INFO] [stderr] 161 |         let runner: &mut Runner = if with_coverage {
[INFO] [stderr]     |                          ^^^^^^ help: use `dyn`: `dyn Runner`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.94s
[INFO] running `"docker" "inspect" "8a3e7ce47c2857f3c2615ed60196cbfe5ec77da645e65ff182ba28f5489a7e4f"`
[INFO] running `"docker" "rm" "-f" "8a3e7ce47c2857f3c2615ed60196cbfe5ec77da645e65ff182ba28f5489a7e4f"`
[INFO] [stdout] 8a3e7ce47c2857f3c2615ed60196cbfe5ec77da645e65ff182ba28f5489a7e4f
[INFO] running `"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=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" "+beta-2020-06-03" "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] b8905109d8ba18b466ef8e6f8ccc5d7812ad310a7c10d67d91ac7c33fcf72442
[INFO] running `"docker" "start" "-a" "b8905109d8ba18b466ef8e6f8ccc5d7812ad310a7c10d67d91ac7c33fcf72442"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:48:31
[INFO] [stderr]    |
[INFO] [stderr] 48 | fn run_mutations(runner: &mut Runner, list: &[String]) -> Result<()> {
[INFO] [stderr]    |                               ^^^^^^ help: use `dyn`: `dyn Runner`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]    --> src/main.rs:161:26
[INFO] [stderr]     |
[INFO] [stderr] 161 |         let runner: &mut Runner = if with_coverage {
[INFO] [stderr]     |                          ^^^^^^ help: use `dyn`: `dyn Runner`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/cargo_mutagen-7eb217540d2c600a
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test tests::it_fails_to_decode_malformed_mutations ... ok
[INFO] [stdout] test tests::it_decodes_well_formed_mutations ... ok
[INFO] [stdout] test runner::tests::it_returns_test_if_they_were_added ... ok
[INFO] [stdout] test runner::tests::it_returns_no_tests_on_empty ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "b8905109d8ba18b466ef8e6f8ccc5d7812ad310a7c10d67d91ac7c33fcf72442"`
[INFO] running `"docker" "rm" "-f" "b8905109d8ba18b466ef8e6f8ccc5d7812ad310a7c10d67d91ac7c33fcf72442"`
[INFO] [stdout] b8905109d8ba18b466ef8e6f8ccc5d7812ad310a7c10d67d91ac7c33fcf72442