[INFO] fetching crate fallible_vec 0.3.1...
[INFO] testing fallible_vec-0.3.1 against 1.100.0-beta.1+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate fallible_vec 0.3.1 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate fallible_vec 0.3.1
[INFO] finished tweaking crates.io crate fallible_vec 0.3.1
[INFO] tweaked toml for crates.io crate fallible_vec 0.3.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate fallible_vec 0.3.1 on toolchain 1.100.0-beta.1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 1 package to highest compatible version
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.100.0-beta.1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 475d09f6cf922f0af893ecbd604579a1175c515c5d673b2e0a1f7c42ce8532c3
[INFO] running `Command { std: "docker" "start" "475d09f6cf922f0af893ecbd604579a1175c515c5d673b2e0a1f7c42ce8532c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "475d09f6cf922f0af893ecbd604579a1175c515c5d673b2e0a1f7c42ce8532c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "475d09f6cf922f0af893ecbd604579a1175c515c5d673b2e0a1f7c42ce8532c3" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "475d09f6cf922f0af893ecbd604579a1175c515c5d673b2e0a1f7c42ce8532c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "475d09f6cf922f0af893ecbd604579a1175c515c5d673b2e0a1f7c42ce8532c3" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling fallible_vec v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:50:40
[INFO] [stdout]    |
[INFO] [stdout] 50 | #![cfg_attr(feature = "allocator_api", feature(allocator_api))]
[INFO] [stdout]    |                                        ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `allocator_api` has been partially stabilized since 1.100.0 and is succeeded by the feature `allocator_ext`
[INFO] [stdout]   --> src/lib.rs:50:48
[INFO] [stdout]    |
[INFO] [stdout] 50 | #![cfg_attr(feature = "allocator_api", feature(allocator_api))]
[INFO] [stdout]    |                                                ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(stable_features)]` on by default
[INFO] [stdout] help: if you are using features which are still unstable, change to using `allocator_ext`
[INFO] [stdout]    |
[INFO] [stdout] 50 - #![cfg_attr(feature = "allocator_api", feature(allocator_api))]
[INFO] [stdout] 50 + #![cfg_attr(feature = "allocator_api", feature(allocator_ext))]
[INFO] [stdout]    |
[INFO] [stdout] help: if you are using features which are now stable, remove this line
[INFO] [stdout]    |
[INFO] [stdout] 50 - #![cfg_attr(feature = "allocator_api", feature(allocator_api))]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0658]: use of unstable library feature `allocator_ext`
[INFO] [stdout]    --> src/lib.rs:410:26
[INFO] [stdout]     |
[INFO] [stdout] 410 |                     self.drain(index..end);
[INFO] [stdout]     |                          ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: required for `A` to implement `alloc::alloc::AllocatorNightly`
[INFO] [stdout] note: required by a bound in `Vec::<T, A>::drain`
[INFO] [stdout]    --> /rustc/e3feeb59cd1bdd011a2bfcc0747b55125d9b8527/library/alloc/src/vec/mod.rs:3047:4
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0658.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fallible_vec` (lib) due to 2 previous errors; 1 warning emitted
[INFO] [stderr] warning: unused dependency `static_assertions`
[INFO] [stderr]  --> Cargo.toml:1:15
[INFO] [stderr]   |
[INFO] [stderr] 1 | [dependencies.static_assertions]
[INFO] [stderr]   |               ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `cargo::unused_dependencies` is set to `warn` by default
[INFO] [stderr] help: consider removing the dependency on `static_assertions`
[INFO] [stderr] warning: `fallible_vec` (manifest) generated 1 warning
[INFO] running `Command { std: "docker" "inspect" "475d09f6cf922f0af893ecbd604579a1175c515c5d673b2e0a1f7c42ce8532c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "475d09f6cf922f0af893ecbd604579a1175c515c5d673b2e0a1f7c42ce8532c3", kill_on_drop: false }`
[INFO] [stdout] 475d09f6cf922f0af893ecbd604579a1175c515c5d673b2e0a1f7c42ce8532c3
