[INFO] fetching crate mjb_gc 0.2.0...
[INFO] testing mjb_gc-0.2.0 against 1.100.0-beta.1+cargoflags=--release for beta-release-1.100-2
[INFO] extracting crate mjb_gc 0.2.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate mjb_gc 0.2.0
[INFO] finished tweaking crates.io crate mjb_gc 0.2.0
[INFO] tweaked toml for crates.io crate mjb_gc 0.2.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mjb_gc 0.2.0 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 7 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-1-tc2/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] e67d6fa3b17f8b3e275341211020a1adbc525ce687fda8dfc7b652e747bc7ad7
[INFO] running `Command { std: "docker" "start" "e67d6fa3b17f8b3e275341211020a1adbc525ce687fda8dfc7b652e747bc7ad7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e67d6fa3b17f8b3e275341211020a1adbc525ce687fda8dfc7b652e747bc7ad7", 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" "e67d6fa3b17f8b3e275341211020a1adbc525ce687fda8dfc7b652e747bc7ad7" "/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" "e67d6fa3b17f8b3e275341211020a1adbc525ce687fda8dfc7b652e747bc7ad7", 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" "e67d6fa3b17f8b3e275341211020a1adbc525ce687fda8dfc7b652e747bc7ad7" "/opt/rustwide/cargo-home/bin/cargo" "+1.100.0-beta.1" "build" "--frozen" "--message-format=json" "--release", kill_on_drop: false }`
[INFO] [stderr]    Compiling mjb_gc v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: expected expression, found reserved keyword `box`
[INFO] [stdout]    --> src/lib.rs:107:23
[INFO] [stdout]     |
[INFO] [stdout] 107 |             Box::leak(box GcInner {
[INFO] [stdout]     |                       ^^^ expected expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: expected expression, found reserved keyword `box`
[INFO] [stdout]    --> src/lib.rs:160:23
[INFO] [stdout]     |
[INFO] [stdout] 160 |             Box::leak(box GcInner {
[INFO] [stdout]     |                       ^^^ expected expression
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]  --> src/lib.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | #![feature(box_syntax)]
[INFO] [stdout]   |            ^^^^^^^^^^ feature has been removed
[INFO] [stdout]   |
[INFO] [stdout]   = note: removed in 1.70.0; see <https://github.com/rust-lang/rust/pull/108471> for more information
[INFO] [stdout]   = note: replaced with `#[rustc_box]`
[INFO] [stdout] 
[INFO] [stdout] 
[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(cell_update)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `boxed::Box`
[INFO] [stdout]   --> src/lib.rs:29:5
[INFO] [stdout]    |
[INFO] [stdout] 29 |     boxed::Box,
[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 `allocator_api` has been partially stabilized since 1.100.0 and is succeeded by the feature `allocator_ext`
[INFO] [stdout]  --> src/lib.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![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] 4 - #![feature(allocator_api)]
[INFO] [stdout] 4 + #![feature(allocator_ext)]
[INFO] [stdout]   |
[INFO] [stdout] help: if you are using features which are now stable, remove this line
[INFO] [stdout]   |
[INFO] [stdout] 4 - #![feature(allocator_api)]
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `cell_update` has been stable since 1.88.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(cell_update)]
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `maybe_uninit_extra` has been stable since 1.60.0 and no longer requires an attribute to enable
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(maybe_uninit_extra)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^^
[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 `mjb_gc` (lib) due to 4 previous errors; 4 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "e67d6fa3b17f8b3e275341211020a1adbc525ce687fda8dfc7b652e747bc7ad7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e67d6fa3b17f8b3e275341211020a1adbc525ce687fda8dfc7b652e747bc7ad7", kill_on_drop: false }`
[INFO] [stdout] e67d6fa3b17f8b3e275341211020a1adbc525ce687fda8dfc7b652e747bc7ad7
