[INFO] fetching crate thinnbox 0.1.2...
[INFO] testing thinnbox-0.1.2 against 1.100.0-beta.1+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate thinnbox 0.1.2 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate thinnbox 0.1.2
[INFO] finished tweaking crates.io crate thinnbox 0.1.2
[INFO] tweaked toml for crates.io crate thinnbox 0.1.2 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate thinnbox 0.1.2 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 21 packages to highest compatible versions
[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-5-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] d97c01b0aef811d8cba499c58bde8b5c5bcc30d0dab5e50c3b192f1a93ec4f44
[INFO] running `Command { std: "docker" "start" "d97c01b0aef811d8cba499c58bde8b5c5bcc30d0dab5e50c3b192f1a93ec4f44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d97c01b0aef811d8cba499c58bde8b5c5bcc30d0dab5e50c3b192f1a93ec4f44", 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" "d97c01b0aef811d8cba499c58bde8b5c5bcc30d0dab5e50c3b192f1a93ec4f44" "/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" "d97c01b0aef811d8cba499c58bde8b5c5bcc30d0dab5e50c3b192f1a93ec4f44", 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" "d97c01b0aef811d8cba499c58bde8b5c5bcc30d0dab5e50c3b192f1a93ec4f44" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling docfg v0.1.0
[INFO] [stderr]    Compiling thinnbox v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]   --> src/lib.rs:1:1
[INFO] [stdout]    |
[INFO] [stdout]  1 | / #![feature(
[INFO] [stdout]  2 | |     ptr_metadata,
[INFO] [stdout]  3 | |     unsize,
[INFO] [stdout]  4 | |     alloc_layout_extra,
[INFO] [stdout] ...  |
[INFO] [stdout] 10 | |     tuple_trait
[INFO] [stdout] 11 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `$i::*`
[INFO] [stdout]   --> src/lib.rs:23:21
[INFO] [stdout]    |
[INFO] [stdout] 19 | macro_rules! flat_mod {
[INFO] [stdout] ...
[INFO] [stdout] 23 |             pub use $i::*;
[INFO] [stdout]    |                     ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 37 | flat_mod! { r#fn, iter, ops, future, ser_de, io }
[INFO] [stdout]    | ------------------------------------------------- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[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:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     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] 5 -     allocator_api,
[INFO] [stdout] 5 +     allocator_ext,
[INFO] [stdout]   |
[INFO] [stdout] help: if you are using features which are now stable, remove this line
[INFO] [stdout]   |
[INFO] [stdout] 5 -     allocator_api,
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `alloc_layout_extra` has been stable since 1.95.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     alloc_layout_extra,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `layout_for_ptr` has been stable since 1.99.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 6 |     layout_for_ptr,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `pointer_byte_offsets` has been stable since 1.75.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:7:5
[INFO] [stdout]   |
[INFO] [stdout] 7 |     pointer_byte_offsets,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `e`
[INFO] [stdout]    --> src/lib.rs:100:21
[INFO] [stdout]     |
[INFO] [stdout] 100 |                 Err(e) => {
[INFO] [stdout]     |                     ^ help: if this is intentional, prefix it with an underscore: `_e`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) 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 `thinnbox` (lib) due to 1 previous error; 6 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "d97c01b0aef811d8cba499c58bde8b5c5bcc30d0dab5e50c3b192f1a93ec4f44", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d97c01b0aef811d8cba499c58bde8b5c5bcc30d0dab5e50c3b192f1a93ec4f44", kill_on_drop: false }`
[INFO] [stdout] d97c01b0aef811d8cba499c58bde8b5c5bcc30d0dab5e50c3b192f1a93ec4f44
