[INFO] fetching crate wasm-mt-pool 0.1.2...
[INFO] testing wasm-mt-pool-0.1.2 against 1.75.0 for beta-1.76-1
[INFO] extracting crate wasm-mt-pool 0.1.2 into /workspace/builds/worker-1-tc1/source
[INFO] validating manifest of crates.io crate wasm-mt-pool 0.1.2 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate wasm-mt-pool 0.1.2
[INFO] finished tweaking crates.io crate wasm-mt-pool 0.1.2
[INFO] tweaked toml for crates.io crate wasm-mt-pool 0.1.2 written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_closure_derive v0.3.3
[INFO] [stderr]   Downloaded wasm-mt v0.1.3
[INFO] [stderr]   Downloaded metatype v0.2.1
[INFO] [stderr]   Downloaded serde_traitobject v0.2.8
[INFO] [stderr]   Downloaded relative v0.2.2
[INFO] [stderr]   Downloaded build_id v0.2.1
[INFO] [stderr]   Downloaded serde_closure v0.3.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b4f0e696f6be4fbd3aaeca58a46e3fe06d369892074e8c479370185bdb5ee5ae
[INFO] running `Command { std: "docker" "start" "-a" "b4f0e696f6be4fbd3aaeca58a46e3fe06d369892074e8c479370185bdb5ee5ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b4f0e696f6be4fbd3aaeca58a46e3fe06d369892074e8c479370185bdb5ee5ae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4f0e696f6be4fbd3aaeca58a46e3fe06d369892074e8c479370185bdb5ee5ae", kill_on_drop: false }`
[INFO] [stdout] b4f0e696f6be4fbd3aaeca58a46e3fe06d369892074e8c479370185bdb5ee5ae
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/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" "RUSTDOCFLAGS=--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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cab83de8ae844960cdb16180e09faf242844db991a45ed742074302ca8af6f88
[INFO] running `Command { std: "docker" "start" "-a" "cab83de8ae844960cdb16180e09faf242844db991a45ed742074302ca8af6f88", kill_on_drop: false }`
[INFO] [stderr]    Compiling typenum v1.17.0
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.89
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling bumpalo v3.14.0
[INFO] [stderr]    Compiling log v0.4.20
[INFO] [stderr]    Compiling nix v0.15.0
[INFO] [stderr]    Compiling heapless v0.5.6
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling hash32 v0.1.1
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.89
[INFO] [stderr]    Compiling wasm-bindgen v0.2.89
[INFO] [stderr]    Compiling nom v2.2.1
[INFO] [stderr]    Compiling rustversion v1.0.14
[INFO] [stderr]    Compiling build_id v0.2.1
[INFO] [stderr]    Compiling cfg-if v0.1.10
[INFO] [stderr]    Compiling procinfo v0.4.2
[INFO] [stderr]    Compiling getrandom v0.2.11
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling static_assertions v1.1.0
[INFO] [stderr]    Compiling twox-hash v1.6.3
[INFO] [stderr]    Compiling uuid v0.8.2
[INFO] [stderr]    Compiling relative v0.2.2
[INFO] [stderr]    Compiling generic-array v0.13.3
[INFO] [stderr]    Compiling generic-array v0.12.4
[INFO] [stderr]    Compiling serde_closure v0.3.3
[INFO] [stderr]    Compiling erased-serde v0.3.31
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.89
[INFO] [stderr]    Compiling as-slice v0.1.5
[INFO] [stderr]    Compiling metatype v0.2.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/metatype-0.2.1/src/lib.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | #![feature(arbitrary_self_types)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/metatype-0.2.1/src/lib.rs:35:1
[INFO] [stdout]    |
[INFO] [stdout] 35 | #![feature(ptr_metadata)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/metatype-0.2.1/src/lib.rs:36:1
[INFO] [stdout]    |
[INFO] [stdout] 36 | #![feature(specialization)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/metatype-0.2.1/src/lib.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 | #![feature(ptr_metadata)]
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `metatype` (lib) due to 5 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "cab83de8ae844960cdb16180e09faf242844db991a45ed742074302ca8af6f88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cab83de8ae844960cdb16180e09faf242844db991a45ed742074302ca8af6f88", kill_on_drop: false }`
[INFO] [stdout] cab83de8ae844960cdb16180e09faf242844db991a45ed742074302ca8af6f88
