[INFO] fetching crate encryption-macros-encryption 0.1.2...
[INFO] documenting encryption-macros-encryption-0.1.2 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate encryption-macros-encryption 0.1.2 into /workspace/builds/worker-109/source
[INFO] validating manifest of crates.io crate encryption-macros-encryption 0.1.2 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate encryption-macros-encryption 0.1.2
[INFO] finished tweaking crates.io crate encryption-macros-encryption 0.1.2
[INFO] tweaked toml for crates.io crate encryption-macros-encryption 0.1.2 written to /workspace/builds/worker-109/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "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" "+1.61.0" "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-109/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0460f2c3ea609f3718bd007a6a3b84a35dfe8e361af8d7c3818f45583d3f8ca4
[INFO] running `Command { std: "docker" "start" "-a" "0460f2c3ea609f3718bd007a6a3b84a35dfe8e361af8d7c3818f45583d3f8ca4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0460f2c3ea609f3718bd007a6a3b84a35dfe8e361af8d7c3818f45583d3f8ca4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0460f2c3ea609f3718bd007a6a3b84a35dfe8e361af8d7c3818f45583d3f8ca4", kill_on_drop: false }`
[INFO] [stdout] 0460f2c3ea609f3718bd007a6a3b84a35dfe8e361af8d7c3818f45583d3f8ca4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-109/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f12fa487604bd0e74e2f564ff87ae0253a739058a15132689e9b3b11f28cff70
[INFO] running `Command { std: "docker" "start" "-a" "f12fa487604bd0e74e2f564ff87ae0253a739058a15132689e9b3b11f28cff70", kill_on_drop: false }`
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]     Checking unicode-ident v1.0.0
[INFO] [stderr]    Compiling hex v0.4.3
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling litrs v0.2.3
[INFO] [stderr]     Checking proc-macro2 v1.0.39
[INFO] [stderr]    Compiling getrandom v0.2.6
[INFO] [stderr]     Checking quote v1.0.18
[INFO] [stderr]    Compiling rand_core v0.6.3
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling encryption-macros-key-generation v0.1.0
[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/encryption-macros-key-generation-0.1.0/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(if_let_guard)]
[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/encryption-macros-key-generation-0.1.0/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(let_chains)]
[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 `encryption-macros-key-generation` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "f12fa487604bd0e74e2f564ff87ae0253a739058a15132689e9b3b11f28cff70", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f12fa487604bd0e74e2f564ff87ae0253a739058a15132689e9b3b11f28cff70", kill_on_drop: false }`
[INFO] [stdout] f12fa487604bd0e74e2f564ff87ae0253a739058a15132689e9b3b11f28cff70