[INFO] fetching crate merk 2.0.1...
[INFO] documenting merk-2.0.1 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate merk 2.0.1 into /workspace/builds/worker-70/source
[INFO] validating manifest of crates.io crate merk 2.0.1 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate merk 2.0.1
[INFO] finished tweaking crates.io crate merk 2.0.1
[INFO] tweaked toml for crates.io crate merk 2.0.1 written to /workspace/builds/worker-70/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "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" "+1.54.0" "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-70/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/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" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3940a0391848ffa37a0a50048ab17ffc5758f6706718da961ee62d60b4112dfa
[INFO] running `Command { std: "docker" "start" "-a" "3940a0391848ffa37a0a50048ab17ffc5758f6706718da961ee62d60b4112dfa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3940a0391848ffa37a0a50048ab17ffc5758f6706718da961ee62d60b4112dfa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3940a0391848ffa37a0a50048ab17ffc5758f6706718da961ee62d60b4112dfa", kill_on_drop: false }`
[INFO] [stdout] 3940a0391848ffa37a0a50048ab17ffc5758f6706718da961ee62d60b4112dfa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-70/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" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 28ecaac3ec797df5e2d297aa76fb248fb5a9dc2ad31f3d54e68f94560b05c24a
[INFO] running `Command { std: "docker" "start" "-a" "28ecaac3ec797df5e2d297aa76fb248fb5a9dc2ad31f3d54e68f94560b05c24a", kill_on_drop: false }`
[INFO] [stderr]    Compiling radium v0.5.3
[INFO] [stderr]    Compiling memchr v2.3.4
[INFO] [stderr]    Compiling tap v1.0.1
[INFO] [stderr]    Compiling wyz v0.2.0
[INFO] [stderr]    Compiling funty v1.1.0
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling getrandom v0.1.16
[INFO] [stderr]    Compiling bindgen v0.59.1
[INFO] [stderr]    Compiling lazycell v1.3.0
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling shlex v1.0.0
[INFO] [stderr]    Compiling fs_extra v1.2.0
[INFO] [stderr]     Checking gimli v0.24.0
[INFO] [stderr]     Checking object v0.24.0
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]    Compiling seq-macro v0.1.5
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]    Compiling clang-sys v1.2.0
[INFO] [stderr]    Compiling nom v6.2.1
[INFO] [stderr]    Compiling libloading v0.7.0
[INFO] [stderr]    Compiling arrayvec v0.4.12
[INFO] [stderr]    Compiling jobserver v0.1.23
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]    Compiling ed-derive v0.1.1
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]    Compiling cc v1.0.69
[INFO] [stderr]     Checking blake2-rfc v0.2.18
[INFO] [stderr]    Compiling bitvec v0.19.5
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/blake2-rfc-0.2.18/src/lib.rs:19:31
[INFO] [stdout]    |
[INFO] [stdout] 19 | #![cfg_attr(feature = "simd", feature(platform_intrinsics, repr_simd))]
[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/github.com-1ecc6299db9ec823/blake2-rfc-0.2.18/src/lib.rs:20:35
[INFO] [stdout]    |
[INFO] [stdout] 20 | #![cfg_attr(feature = "simd_opt", feature(cfg_target_feature))]
[INFO] [stdout]    |                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `cfg_target_feature` has been stable since 1.27.0 and no longer requires an attribute to enable
[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/github.com-1ecc6299db9ec823/blake2-rfc-0.2.18/src/lib.rs:21:35
[INFO] [stdout]    |
[INFO] [stdout] 21 | #![cfg_attr(feature = "simd_asm", feature(asm))]
[INFO] [stdout]    |                                   ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `blake2-rfc`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "28ecaac3ec797df5e2d297aa76fb248fb5a9dc2ad31f3d54e68f94560b05c24a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "28ecaac3ec797df5e2d297aa76fb248fb5a9dc2ad31f3d54e68f94560b05c24a", kill_on_drop: false }`
[INFO] [stdout] 28ecaac3ec797df5e2d297aa76fb248fb5a9dc2ad31f3d54e68f94560b05c24a
