[INFO] fetching crate fuzzmutator 0.2.1...
[INFO] testing fuzzmutator-0.2.1 against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-1
[INFO] extracting crate fuzzmutator 0.2.1 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate fuzzmutator 0.2.1
[INFO] finished tweaking crates.io crate fuzzmutator 0.2.1
[INFO] tweaked toml for crates.io crate fuzzmutator 0.2.1 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate fuzzmutator 0.2.1 on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 9 packages to latest compatible versions
[INFO] [stderr]       Adding rand v0.4.6 (available: v0.10.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "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" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f963a6ca18d8b97a4b2bd3e9b5af6075c24939398fb62e0c222e99d3c1411c82
[INFO] running `Command { std: "docker" "start" "-a" "f963a6ca18d8b97a4b2bd3e9b5af6075c24939398fb62e0c222e99d3c1411c82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f963a6ca18d8b97a4b2bd3e9b5af6075c24939398fb62e0c222e99d3c1411c82", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f963a6ca18d8b97a4b2bd3e9b5af6075c24939398fb62e0c222e99d3c1411c82", kill_on_drop: false }`
[INFO] [stdout] f963a6ca18d8b97a4b2bd3e9b5af6075c24939398fb62e0c222e99d3c1411c82
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8e56457a9f9e753bc688cdd7e9236c20cbebf62bf23e9b2a8a41cf3fa3c6df50
[INFO] running `Command { std: "docker" "start" "-a" "8e56457a9f9e753bc688cdd7e9236c20cbebf62bf23e9b2a8a41cf3fa3c6df50", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling libc v0.2.184
[INFO] [stderr]    Compiling rand v0.4.6
[INFO] [stderr]    Compiling fuzzmutator v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.82s
[INFO] running `Command { std: "docker" "inspect" "8e56457a9f9e753bc688cdd7e9236c20cbebf62bf23e9b2a8a41cf3fa3c6df50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8e56457a9f9e753bc688cdd7e9236c20cbebf62bf23e9b2a8a41cf3fa3c6df50", kill_on_drop: false }`
[INFO] [stdout] 8e56457a9f9e753bc688cdd7e9236c20cbebf62bf23e9b2a8a41cf3fa3c6df50
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 73f26c784fbe86ed3bbaa8e254a11140fa6c930622b63819dffe88b77db903a2
[INFO] running `Command { std: "docker" "start" "-a" "73f26c784fbe86ed3bbaa8e254a11140fa6c930622b63819dffe88b77db903a2", kill_on_drop: false }`
[INFO] [stderr] warning: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr]    Compiling fuzzmutator v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0599]: no method named `mutation_grade` found for struct `MutatorEngine` in the current scope
[INFO] [stdout]    --> src/mutator.rs:389:19
[INFO] [stdout]     |
[INFO] [stdout]  28 | pub struct MutatorEngine {
[INFO] [stdout]     | ------------------------ method `mutation_grade` not found for this struct
[INFO] [stdout] ...
[INFO] [stdout] 389 |         mutatoren.mutation_grade(0.199);
[INFO] [stdout]     |                   ^^^^^^^^^^^^^^ method not found in `MutatorEngine`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fuzzmutator` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "73f26c784fbe86ed3bbaa8e254a11140fa6c930622b63819dffe88b77db903a2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "73f26c784fbe86ed3bbaa8e254a11140fa6c930622b63819dffe88b77db903a2", kill_on_drop: false }`
[INFO] [stdout] 73f26c784fbe86ed3bbaa8e254a11140fa6c930622b63819dffe88b77db903a2