[INFO] fetching crate pwasm-alloc 0.4.1...
[INFO] testing pwasm-alloc-0.4.1 against beta-2021-08-01 for beta-1.55-1
[INFO] extracting crate pwasm-alloc 0.4.1 into /workspace/builds/worker-115/source
[INFO] validating manifest of crates.io crate pwasm-alloc 0.4.1 on toolchain beta-2021-08-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate pwasm-alloc 0.4.1
[INFO] finished tweaking crates.io crate pwasm-alloc 0.4.1
[INFO] tweaked toml for crates.io crate pwasm-alloc 0.4.1 written to /workspace/builds/worker-115/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-115/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-115/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f8fdff9f17b6e373fcb3926de15a7913c77d57ef06a76bc10e73b17bbe921b90
[INFO] running `Command { std: "docker" "start" "-a" "f8fdff9f17b6e373fcb3926de15a7913c77d57ef06a76bc10e73b17bbe921b90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f8fdff9f17b6e373fcb3926de15a7913c77d57ef06a76bc10e73b17bbe921b90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8fdff9f17b6e373fcb3926de15a7913c77d57ef06a76bc10e73b17bbe921b90", kill_on_drop: false }`
[INFO] [stdout] f8fdff9f17b6e373fcb3926de15a7913c77d57ef06a76bc10e73b17bbe921b90
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-115/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-115/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2df454d5044c8afbbd699816058631f61ec119924605c2f6aab7a36aa11c3763
[INFO] running `Command { std: "docker" "start" "-a" "2df454d5044c8afbbd699816058631f61ec119924605c2f6aab7a36aa11c3763", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling wee_alloc v0.4.5
[INFO] [stderr]    Compiling memory_units v0.4.0
[INFO] [stderr]    Compiling pwasm-alloc v0.4.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:5:1
[INFO] [stdout]   |
[INFO] [stdout] 5 | #![feature(allocator_api)]
[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 `pwasm-alloc` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "2df454d5044c8afbbd699816058631f61ec119924605c2f6aab7a36aa11c3763", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2df454d5044c8afbbd699816058631f61ec119924605c2f6aab7a36aa11c3763", kill_on_drop: false }`
[INFO] [stdout] 2df454d5044c8afbbd699816058631f61ec119924605c2f6aab7a36aa11c3763
