[INFO] fetching crate metamorphosis 0.0.0...
[INFO] testing metamorphosis-0.0.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate metamorphosis 0.0.0 into /workspace/builds/worker-86/source
[INFO] validating manifest of crates.io crate metamorphosis 0.0.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate metamorphosis 0.0.0
[INFO] finished tweaking crates.io crate metamorphosis 0.0.0
[INFO] tweaked toml for crates.io crate metamorphosis 0.0.0 written to /workspace/builds/worker-86/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded callback v0.5.3
[INFO] [stderr]   Downloaded anystring_macro v0.0.1
[INFO] [stderr]   Downloaded cstring v0.0.5
[INFO] [stderr]   Downloaded globals v1.0.2
[INFO] [stderr]   Downloaded anystring v0.0.2
[INFO] [stderr]   Downloaded web_common v0.0.7
[INFO] [stderr]   Downloaded js_ffi v0.2.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5268f7bebffc3989f1a9cf189f942221fb0ad71952be9e8219b2cc5016f0ac6d
[INFO] running `Command { std: "docker" "start" "-a" "5268f7bebffc3989f1a9cf189f942221fb0ad71952be9e8219b2cc5016f0ac6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5268f7bebffc3989f1a9cf189f942221fb0ad71952be9e8219b2cc5016f0ac6d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5268f7bebffc3989f1a9cf189f942221fb0ad71952be9e8219b2cc5016f0ac6d", kill_on_drop: false }`
[INFO] [stdout] 5268f7bebffc3989f1a9cf189f942221fb0ad71952be9e8219b2cc5016f0ac6d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-86/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0131add41e4c2192a9597c9040f5aec886f7b544f7231e7ad82d0de2b6cc04bd
[INFO] running `Command { std: "docker" "start" "-a" "0131add41e4c2192a9597c9040f5aec886f7b544f7231e7ad82d0de2b6cc04bd", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling spin v0.5.2
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling cty v0.2.1
[INFO] [stderr]    Compiling web_common v0.0.7
[INFO] [stderr]    Compiling once_cell v1.8.0
[INFO] [stderr]    Compiling anystring_macro v0.0.1
[INFO] [stderr]    Compiling lock_api v0.4.5
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling globals v1.0.2
[INFO] [stderr]    Compiling spin v0.9.2
[INFO] [stderr]    Compiling anystring v0.0.2
[INFO] [stderr]    Compiling callback v0.5.3
[INFO] [stderr]    Compiling cstring v0.0.5
[INFO] [stderr]    Compiling js_ffi v0.2.2
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/js_ffi-0.2.2/src/lib.rs:666:26
[INFO] [stdout]     |
[INFO] [stdout] 666 |     let h = get_callback(id);
[INFO] [stdout]     |                          ^^ expected `f64`, found `u32`
[INFO] [stdout]     |
[INFO] [stdout] help: you can convert a `u32` to an `f64`, producing the floating point representation of the integer
[INFO] [stdout]     |
[INFO] [stdout] 666 |     let h = get_callback(id.into());
[INFO] [stdout]     |                          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `js_ffi` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "0131add41e4c2192a9597c9040f5aec886f7b544f7231e7ad82d0de2b6cc04bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0131add41e4c2192a9597c9040f5aec886f7b544f7231e7ad82d0de2b6cc04bd", kill_on_drop: false }`
[INFO] [stdout] 0131add41e4c2192a9597c9040f5aec886f7b544f7231e7ad82d0de2b6cc04bd