[INFO] fetching crate wasm-mt-pool 0.1.2...
[INFO] testing wasm-mt-pool-0.1.2 against 1.99.0-beta.8 for beta-1.100-2
[INFO] extracting crate wasm-mt-pool 0.1.2 into /workspace/builds/worker-5-tc1/source
[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-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate wasm-mt-pool 0.1.2 on toolchain 1.99.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "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" "+1.99.0-beta.8" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 88 packages to highest compatible versions
[INFO] [stderr]       Adding minicov v0.3.8 (available: v0.3.9)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded wasm-mt v0.1.3
[INFO] [stderr]   Downloaded serde_traitobject v0.2.9
[INFO] [stderr]   Downloaded build_id v0.2.1
[INFO] [stderr]   Downloaded twox-hash v1.6.3
[INFO] [stderr]   Downloaded relative v0.2.2
[INFO] [stderr]   Downloaded generic-array v0.13.3
[INFO] [stderr]   Downloaded erased-serde v0.3.31
[INFO] [stderr]   Downloaded as-slice v0.1.5
[INFO] [stderr]   Downloaded hash32 v0.1.1
[INFO] [stderr]   Downloaded serde_closure v0.3.3
[INFO] [stderr]   Downloaded wasm-bindgen-test-shared v0.2.129
[INFO] [stderr]   Downloaded serde_closure_derive v0.3.3
[INFO] [stderr]   Downloaded wasm-bindgen-test-macro v0.3.79
[INFO] [stderr]   Downloaded metatype v0.2.2
[INFO] [stderr]   Downloaded wasm-bindgen-test v0.3.79
[INFO] [stderr]   Downloaded palaver v0.2.8
[INFO] [stderr]   Downloaded procinfo v0.4.2
[INFO] [stderr]   Downloaded generic-array v0.12.4
[INFO] [stderr]   Downloaded heapless v0.5.6
[INFO] [stderr]   Downloaded nom v2.2.1
[INFO] [stderr]   Downloaded nix v0.15.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3111399a4047eeb3a02b7a90e478d715f38a8c6669b5c4b49d30a17385265909" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] ceeba586bced5adad5944dcd9e77f44849ffafefdc401d64873edebf285c6793
[INFO] running `Command { std: "docker" "start" "ceeba586bced5adad5944dcd9e77f44849ffafefdc401d64873edebf285c6793", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ceeba586bced5adad5944dcd9e77f44849ffafefdc401d64873edebf285c6793", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "ceeba586bced5adad5944dcd9e77f44849ffafefdc401d64873edebf285c6793" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ceeba586bced5adad5944dcd9e77f44849ffafefdc401d64873edebf285c6793", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "ceeba586bced5adad5944dcd9e77f44849ffafefdc401d64873edebf285c6793" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling unicode-ident v1.0.26
[INFO] [stderr]    Compiling rustversion v1.0.23
[INFO] [stderr]    Compiling serde_core v1.0.229
[INFO] [stderr]    Compiling cfg-if v1.0.5
[INFO] [stderr]    Compiling libc v0.2.190
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.129
[INFO] [stderr]    Compiling bumpalo v3.20.3
[INFO] [stderr]    Compiling heapless v0.5.6
[INFO] [stderr]    Compiling generic-array v0.14.9
[INFO] [stderr]    Compiling generic-array v0.13.3
[INFO] [stderr]    Compiling generic-array v0.12.4
[INFO] [stderr]    Compiling nix v0.15.0
[INFO] [stderr]    Compiling hash32 v0.1.1
[INFO] [stderr]    Compiling nom v2.2.1
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling procinfo v0.4.2
[INFO] [stderr]    Compiling build_id v0.2.1
[INFO] [stderr]    Compiling futures-task v0.3.34
[INFO] [stderr]    Compiling proc-macro2 v1.0.107
[INFO] [stderr]    Compiling futures-core v0.3.34
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling twox-hash v1.6.3
[INFO] [stderr]    Compiling relative v0.2.2
[INFO] [stderr]    Compiling futures-util v0.3.34
[INFO] [stderr]    Compiling metatype v0.2.2
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/metatype-0.2.2/src/lib.rs:34:1
[INFO] [stdout]    |
[INFO] [stdout] 34 | #![feature(arbitrary_self_types_pointers)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[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 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "ceeba586bced5adad5944dcd9e77f44849ffafefdc401d64873edebf285c6793", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ceeba586bced5adad5944dcd9e77f44849ffafefdc401d64873edebf285c6793", kill_on_drop: false }`
[INFO] [stdout] ceeba586bced5adad5944dcd9e77f44849ffafefdc401d64873edebf285c6793
