[INFO] fetching crate sha2-const 0.1.1...
[INFO] testing sha2-const-0.1.1 against 1.55.0 for beta-1.56-1
[INFO] extracting crate sha2-const 0.1.1 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate sha2-const 0.1.1 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate sha2-const 0.1.1
[INFO] finished tweaking crates.io crate sha2-const 0.1.1
[INFO] tweaked toml for crates.io crate sha2-const 0.1.1 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b56c133f2f68db82da1cdbb95919df386cb7b6b72ab9abfc77f1a0896530de05
[INFO] running `Command { std: "docker" "start" "-a" "b56c133f2f68db82da1cdbb95919df386cb7b6b72ab9abfc77f1a0896530de05", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b56c133f2f68db82da1cdbb95919df386cb7b6b72ab9abfc77f1a0896530de05", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b56c133f2f68db82da1cdbb95919df386cb7b6b72ab9abfc77f1a0896530de05", kill_on_drop: false }`
[INFO] [stdout] b56c133f2f68db82da1cdbb95919df386cb7b6b72ab9abfc77f1a0896530de05
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2144f686e708f70c6e9b49d897cb52f117437b8811c25dedb8b65844a6f8690f
[INFO] running `Command { std: "docker" "start" "-a" "2144f686e708f70c6e9b49d897cb52f117437b8811c25dedb8b65844a6f8690f", kill_on_drop: false }`
[INFO] [stderr]    Compiling sha2-const v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]   --> src/lib.rs:44:12
[INFO] [stdout]    |
[INFO] [stdout] 44 | #![feature(const_fn)]
[INFO] [stdout]    |            ^^^^^^^^ feature has been removed
[INFO] [stdout]    |
[INFO] [stdout]    = note: split into finer-grained feature gates
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:44:1
[INFO] [stdout]    |
[INFO] [stdout] 44 | #![feature(const_fn)]
[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:45:1
[INFO] [stdout]    |
[INFO] [stdout] 45 | #![feature(const_if_match)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `const_if_match` has been stable since 1.46.0 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]   --> src/lib.rs:46:1
[INFO] [stdout]    |
[INFO] [stdout] 46 | #![feature(const_loop)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]    |
[INFO] [stdout]    = help: the feature `const_loop` has been stable since 1.46.0 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]   --> src/lib.rs:47:1
[INFO] [stdout]    |
[INFO] [stdout] 47 | #![feature(const_mut_refs)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 5 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0557.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `sha2-const` due to 6 previous errors
[INFO] running `Command { std: "docker" "inspect" "2144f686e708f70c6e9b49d897cb52f117437b8811c25dedb8b65844a6f8690f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2144f686e708f70c6e9b49d897cb52f117437b8811c25dedb8b65844a6f8690f", kill_on_drop: false }`
[INFO] [stdout] 2144f686e708f70c6e9b49d897cb52f117437b8811c25dedb8b65844a6f8690f