[INFO] fetching crate wasm-reader 0.2.0...
[INFO] checking wasm-reader-0.2.0 against beta for pr-78714
[INFO] extracting crate wasm-reader 0.2.0 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate wasm-reader 0.2.0 on toolchain beta
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate wasm-reader 0.2.0
[INFO] finished tweaking crates.io crate wasm-reader 0.2.0
[INFO] tweaked toml for crates.io crate wasm-reader 0.2.0 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d40910e610a42d24656dc78c5b56aa2586f3a340a75612c176149957a6bd18aa
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "d40910e610a42d24656dc78c5b56aa2586f3a340a75612c176149957a6bd18aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d40910e610a42d24656dc78c5b56aa2586f3a340a75612c176149957a6bd18aa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d40910e610a42d24656dc78c5b56aa2586f3a340a75612c176149957a6bd18aa", kill_on_drop: false }`
[INFO] [stdout] d40910e610a42d24656dc78c5b56aa2586f3a340a75612c176149957a6bd18aa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:6eabd152ff4036248d66efda456a36cb33d24b7291b33f25f75140726c88da35" "/opt/rustwide/cargo-home/bin/cargo" "+beta" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2aeafe9d67a28c2183d4a3249e3ec3a8047be1071df6e8d04b63e11af5bea03c
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "2aeafe9d67a28c2183d4a3249e3ec3a8047be1071df6e8d04b63e11af5bea03c", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking frunk_core v0.3.1
[INFO] [stderr]    Compiling auto_enums_derive v0.7.9
[INFO] [stderr]    Compiling derive_utils v0.11.0
[INFO] [stderr]    Compiling derive_utils v0.9.1
[INFO] [stderr]    Compiling auto_enums_core v0.7.9
[INFO] [stderr]    Compiling quickcheck_macros v0.9.1
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]    Compiling derive-parse v0.1.0
[INFO] [stderr]     Checking auto_enums v0.7.9
[INFO] [stderr]     Checking wasm-reader-traits v0.1.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/wasm-reader-traits-0.1.1/src/lib.rs:1:34
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![cfg_attr(feature = "nightly", feature(specialization))]
[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 E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `wasm-reader-traits`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "2aeafe9d67a28c2183d4a3249e3ec3a8047be1071df6e8d04b63e11af5bea03c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2aeafe9d67a28c2183d4a3249e3ec3a8047be1071df6e8d04b63e11af5bea03c", kill_on_drop: false }`
[INFO] [stdout] 2aeafe9d67a28c2183d4a3249e3ec3a8047be1071df6e8d04b63e11af5bea03c