[INFO] fetching crate yffi 0.6.0...
[INFO] testing yffi-0.6.0 against 1.60.0 for beta-1.61-1
[INFO] extracting crate yffi 0.6.0 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate yffi 0.6.0 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate yffi 0.6.0
[INFO] finished tweaking crates.io crate yffi 0.6.0
[INFO] tweaked toml for crates.io crate yffi 0.6.0 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 57ec30db31192b520a6acb6027f6a4d59cb0eb7c81530c8c3743b6a6437d059f
[INFO] running `Command { std: "docker" "start" "-a" "57ec30db31192b520a6acb6027f6a4d59cb0eb7c81530c8c3743b6a6437d059f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "57ec30db31192b520a6acb6027f6a4d59cb0eb7c81530c8c3743b6a6437d059f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "57ec30db31192b520a6acb6027f6a4d59cb0eb7c81530c8c3743b6a6437d059f", kill_on_drop: false }`
[INFO] [stdout] 57ec30db31192b520a6acb6027f6a4d59cb0eb7c81530c8c3743b6a6437d059f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 91d948b3a49f2ec925de31ecea48e34acbb7a071f7799a5a505c2b4358b4491a
[INFO] running `Command { std: "docker" "start" "-a" "91d948b3a49f2ec925de31ecea48e34acbb7a071f7799a5a505c2b4358b4491a", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling bumpalo v3.9.1
[INFO] [stderr]    Compiling wasm-bindgen v0.2.80
[INFO] [stderr]    Compiling smallvec v1.8.0
[INFO] [stderr]    Compiling lib0 v0.6.0
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.80
[INFO] [stderr]    Compiling smallstr v0.2.0
[INFO] [stderr]    Compiling rand_core v0.5.1
[INFO] [stderr]    Compiling rand_chacha v0.2.2
[INFO] [stderr]    Compiling rand v0.7.3
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.80
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.80
[INFO] [stderr]    Compiling yrs v0.6.0
[INFO] [stderr]    Compiling yffi v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/lib.rs:2556:9
[INFO] [stdout]      |
[INFO] [stdout] 2556 |     let mut branch = ytype.as_mut().unwrap();
[INFO] [stdout]      |         ----^^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/lib.rs:2825:9
[INFO] [stdout]      |
[INFO] [stdout] 2825 |     let mut branch = ytype.as_mut().unwrap();
[INFO] [stdout]      |         ----^^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.97s
[INFO] running `Command { std: "docker" "inspect" "91d948b3a49f2ec925de31ecea48e34acbb7a071f7799a5a505c2b4358b4491a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "91d948b3a49f2ec925de31ecea48e34acbb7a071f7799a5a505c2b4358b4491a", kill_on_drop: false }`
[INFO] [stdout] 91d948b3a49f2ec925de31ecea48e34acbb7a071f7799a5a505c2b4358b4491a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4086c8a6525999a40d9d29e39c4f0a6eb6d4c26a404b1f363f587391ad00a6f1
[INFO] running `Command { std: "docker" "start" "-a" "4086c8a6525999a40d9d29e39c4f0a6eb6d4c26a404b1f363f587391ad00a6f1", kill_on_drop: false }`
[INFO] [stderr]    Compiling yffi v0.6.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/lib.rs:2556:9
[INFO] [stdout]      |
[INFO] [stdout] 2556 |     let mut branch = ytype.as_mut().unwrap();
[INFO] [stdout]      |         ----^^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout]      |
[INFO] [stdout]      = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]     --> src/lib.rs:2825:9
[INFO] [stdout]      |
[INFO] [stdout] 2825 |     let mut branch = ytype.as_mut().unwrap();
[INFO] [stdout]      |         ----^^^^^^
[INFO] [stdout]      |         |
[INFO] [stdout]      |         help: remove this `mut`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.39s
[INFO] running `Command { std: "docker" "inspect" "4086c8a6525999a40d9d29e39c4f0a6eb6d4c26a404b1f363f587391ad00a6f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4086c8a6525999a40d9d29e39c4f0a6eb6d4c26a404b1f363f587391ad00a6f1", kill_on_drop: false }`
[INFO] [stdout] 4086c8a6525999a40d9d29e39c4f0a6eb6d4c26a404b1f363f587391ad00a6f1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] a027c5f15a474c5a65955f28afd2d1f8434acd65f74ac9c00956d88b5e70bf35
[INFO] running `Command { std: "docker" "start" "-a" "a027c5f15a474c5a65955f28afd2d1f8434acd65f74ac9c00956d88b5e70bf35", kill_on_drop: false }`
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]     --> src/lib.rs:2556:9
[INFO] [stderr]      |
[INFO] [stderr] 2556 |     let mut branch = ytype.as_mut().unwrap();
[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: variable does not need to be mutable
[INFO] [stderr]     --> src/lib.rs:2825:9
[INFO] [stderr]      |
[INFO] [stderr] 2825 |     let mut branch = ytype.as_mut().unwrap();
[INFO] [stderr]      |         ----^^^^^^
[INFO] [stderr]      |         |
[INFO] [stderr]      |         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: `yffi` (lib test) generated 2 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/yrs-d2485fc2db523b6e)
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test test::yval_preliminary_types ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "a027c5f15a474c5a65955f28afd2d1f8434acd65f74ac9c00956d88b5e70bf35", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a027c5f15a474c5a65955f28afd2d1f8434acd65f74ac9c00956d88b5e70bf35", kill_on_drop: false }`
[INFO] [stdout] a027c5f15a474c5a65955f28afd2d1f8434acd65f74ac9c00956d88b5e70bf35