[INFO] fetching crate memlib 0.1.3...
[INFO] testing memlib-0.1.3 against 1.91.0 for beta-1.92-2
[INFO] extracting crate memlib 0.1.3 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate memlib 0.1.3
[INFO] finished tweaking crates.io crate memlib 0.1.3
[INFO] tweaked toml for crates.io crate memlib 0.1.3 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate memlib 0.1.3 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate memlib 0.1.3 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded derive_pod v0.1.2
[INFO] [stderr]   Downloaded regex v1.5.6
[INFO] [stderr]   Downloaded regex-syntax v0.6.26
[INFO] [stderr]   Downloaded proc-macro2 v1.0.39
[INFO] [stderr]   Downloaded syn v1.0.96
[INFO] [stderr]   Downloaded unicode-ident v1.0.0
[INFO] [stderr]   Downloaded auto_impl v0.5.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] cca634ebea28efc7664f3bcba059b93d76c871bf2494503afc2e11f0e0214a53
[INFO] running `Command { std: "docker" "start" "-a" "cca634ebea28efc7664f3bcba059b93d76c871bf2494503afc2e11f0e0214a53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cca634ebea28efc7664f3bcba059b93d76c871bf2494503afc2e11f0e0214a53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cca634ebea28efc7664f3bcba059b93d76c871bf2494503afc2e11f0e0214a53", kill_on_drop: false }`
[INFO] [stdout] cca634ebea28efc7664f3bcba059b93d76c871bf2494503afc2e11f0e0214a53
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/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" "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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0edf05ef238c5aa9398e71b930cb30b746fac85027f4ecad7b1eaa6933d1896c
[INFO] running `Command { std: "docker" "start" "-a" "0edf05ef238c5aa9398e71b930cb30b746fac85027f4ecad7b1eaa6933d1896c", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]    Compiling unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.96
[INFO] [stderr]    Compiling derive_pod v0.1.2
[INFO] [stderr]    Compiling dataview v1.0.1
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling auto_impl v0.5.0
[INFO] [stderr]    Compiling memlib v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(decl_macro)]
[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:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(associated_type_defaults)]
[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:3:1
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(associated_type_bounds)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `associated_type_bounds` has been stable since `1.79.0` and no longer requires an attribute to enable
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `slice_impl::*`
[INFO] [stdout]   --> src/lib.rs:33:9
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub use slice_impl::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `associated_type_bounds` has been stable since 1.79.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(associated_type_bounds)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `memlib` (lib) due to 3 previous errors; 2 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "0edf05ef238c5aa9398e71b930cb30b746fac85027f4ecad7b1eaa6933d1896c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0edf05ef238c5aa9398e71b930cb30b746fac85027f4ecad7b1eaa6933d1896c", kill_on_drop: false }`
[INFO] [stdout] 0edf05ef238c5aa9398e71b930cb30b746fac85027f4ecad7b1eaa6933d1896c