[INFO] fetching crate staticvec 0.11.5...
[INFO] testing staticvec-0.11.5 against 1.60.0 for beta-1.61-1
[INFO] extracting crate staticvec 0.11.5 into /workspace/builds/worker-27/source
[INFO] validating manifest of crates.io crate staticvec 0.11.5 on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate staticvec 0.11.5
[INFO] removed 3 missing examples
[INFO] removed 3 missing tests
[INFO] finished tweaking crates.io crate staticvec 0.11.5
[INFO] tweaked toml for crates.io crate staticvec 0.11.5 written to /workspace/builds/worker-27/source/Cargo.toml
[INFO] crate crates.io crate staticvec 0.11.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cool_asserts v1.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 74145a67f9e8e60c5d95be1000e0b263c7c8e2d7ecd5b5c593cc61e5140ee62d
[INFO] running `Command { std: "docker" "start" "-a" "74145a67f9e8e60c5d95be1000e0b263c7c8e2d7ecd5b5c593cc61e5140ee62d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "74145a67f9e8e60c5d95be1000e0b263c7c8e2d7ecd5b5c593cc61e5140ee62d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "74145a67f9e8e60c5d95be1000e0b263c7c8e2d7ecd5b5c593cc61e5140ee62d", kill_on_drop: false }`
[INFO] [stdout] 74145a67f9e8e60c5d95be1000e0b263c7c8e2d7ecd5b5c593cc61e5140ee62d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4ead72e220a0c40e1a4f8edcb1991164b86ba12f08f4b974c8f50f7551471aaf
[INFO] running `Command { std: "docker" "start" "-a" "4ead72e220a0c40e1a4f8edcb1991164b86ba12f08f4b974c8f50f7551471aaf", kill_on_drop: false }`
[INFO] [stderr]    Compiling staticvec v0.11.5 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:31:1
[INFO] [stdout]    |
[INFO] [stdout] 31 | / #![feature(
[INFO] [stdout] 32 | |   adt_const_params,
[INFO] [stdout] 33 | |   const_assume,
[INFO] [stdout] 34 | |   const_eval_select,
[INFO] [stdout] ...  |
[INFO] [stdout] 63 | |   untagged_unions
[INFO] [stdout] 64 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:65:30
[INFO] [stdout]    |
[INFO] [stdout] 65 | #![cfg_attr(feature = "std", feature(read_buf))]
[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 `staticvec` due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "4ead72e220a0c40e1a4f8edcb1991164b86ba12f08f4b974c8f50f7551471aaf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4ead72e220a0c40e1a4f8edcb1991164b86ba12f08f4b974c8f50f7551471aaf", kill_on_drop: false }`
[INFO] [stdout] 4ead72e220a0c40e1a4f8edcb1991164b86ba12f08f4b974c8f50f7551471aaf