[INFO] fetching crate wasmer-singlepass-backend 0.17.1...
[INFO] documenting wasmer-singlepass-backend-0.17.1 against beta-2021-08-01 for beta-1.55-rustdoc-1
[INFO] extracting crate wasmer-singlepass-backend 0.17.1 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate wasmer-singlepass-backend 0.17.1 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 wasmer-singlepass-backend 0.17.1
[INFO] finished tweaking crates.io crate wasmer-singlepass-backend 0.17.1
[INFO] tweaked toml for crates.io crate wasmer-singlepass-backend 0.17.1 written to /workspace/builds/worker-15/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] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-08-01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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] 5e80951a10d323509b9b5df503af75eaf2fcdb003366c24b5a7dcd3a9820ed15
[INFO] running `Command { std: "docker" "start" "-a" "5e80951a10d323509b9b5df503af75eaf2fcdb003366c24b5a7dcd3a9820ed15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5e80951a10d323509b9b5df503af75eaf2fcdb003366c24b5a7dcd3a9820ed15", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5e80951a10d323509b9b5df503af75eaf2fcdb003366c24b5a7dcd3a9820ed15", kill_on_drop: false }`
[INFO] [stdout] 5e80951a10d323509b9b5df503af75eaf2fcdb003366c24b5a7dcd3a9820ed15
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-08-01" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 956d38d68d2d06ce7c815ef1063344fb63398dceb0f101375d974c7fce79e4c3
[INFO] running `Command { std: "docker" "start" "-a" "956d38d68d2d06ce7c815ef1063344fb63398dceb0f101375d974c7fce79e4c3", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling target-lexicon v0.10.0
[INFO] [stderr]    Compiling nix v0.15.0
[INFO] [stderr]    Compiling stable_deref_trait v1.2.0
[INFO] [stderr]     Checking wasmparser v0.51.4
[INFO] [stderr]    Compiling blake3 v0.3.8
[INFO] [stderr]     Checking parking_lot_core v0.7.2
[INFO] [stderr]     Checking serde-bench v0.0.7
[INFO] [stderr]     Checking indexmap v1.7.0
[INFO] [stderr]     Checking errno v0.2.7
[INFO] [stderr]     Checking page_size v0.4.2
[INFO] [stderr]     Checking serde_bytes v0.11.5
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]    Compiling crypto-mac v0.8.0
[INFO] [stderr]    Compiling owning_ref v0.4.1
[INFO] [stderr]     Checking dynasmrt v0.5.2
[INFO] [stderr]     Checking parking_lot v0.10.2
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling wasmer-runtime-core v0.17.1
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]    Compiling dynasm v0.5.2
[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/dynasm-0.5.2/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_diagnostic)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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/dynasm-0.5.2/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(proc_macro_span)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 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 `dynasm` due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "956d38d68d2d06ce7c815ef1063344fb63398dceb0f101375d974c7fce79e4c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "956d38d68d2d06ce7c815ef1063344fb63398dceb0f101375d974c7fce79e4c3", kill_on_drop: false }`
[INFO] [stdout] 956d38d68d2d06ce7c815ef1063344fb63398dceb0f101375d974c7fce79e4c3
