[INFO] fetching crate char-list 0.4.0...
[INFO] testing char-list-0.4.0 against try#c2e32f1c9652b13ed99608599c1e855462f421f3 for pr-146098-7
[INFO] extracting crate char-list 0.4.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate char-list 0.4.0
[INFO] finished tweaking crates.io crate char-list 0.4.0
[INFO] tweaked toml for crates.io crate char-list 0.4.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate char-list 0.4.0 on toolchain c2e32f1c9652b13ed99608599c1e855462f421f3
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate char-list 0.4.0 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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 808ff01ec08287270a30611f17fd46d21b506aa4a527d9d0e2ea658e18e9c48c
[INFO] running `Command { std: "docker" "start" "-a" "808ff01ec08287270a30611f17fd46d21b506aa4a527d9d0e2ea658e18e9c48c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "808ff01ec08287270a30611f17fd46d21b506aa4a527d9d0e2ea658e18e9c48c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "808ff01ec08287270a30611f17fd46d21b506aa4a527d9d0e2ea658e18e9c48c", kill_on_drop: false }`
[INFO] [stdout] 808ff01ec08287270a30611f17fd46d21b506aa4a527d9d0e2ea658e18e9c48c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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" "+c2e32f1c9652b13ed99608599c1e855462f421f3" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 959fe86414d6c6217c1201b4438acbafd9ea0c19c09c7b82a24d78b9df4e74e8
[INFO] running `Command { std: "docker" "start" "-a" "959fe86414d6c6217c1201b4438acbafd9ea0c19c09c7b82a24d78b9df4e74e8", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling base64 v0.13.1
[INFO] [stderr]    Compiling front-vec v0.0.8
[INFO] [stderr]    Compiling tracing-core v0.1.32
[INFO] [stderr]    Compiling syn v2.0.53
[INFO] [stdout] error[E0599]: no function or associated item named `slice_assume_init_ref` found for union `MaybeUninit<T>` in the current scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/front-vec-0.0.8/src/front_vec/front_vec.rs:305:31
[INFO] [stdout]     |
[INFO] [stdout] 305 |         unsafe { MaybeUninit::slice_assume_init_ref(slice) }
[INFO] [stdout]     |                               ^^^^^^^^^^^^^^^^^^^^^ function or associated item not found in `MaybeUninit<_>`
[INFO] [stdout]     |
[INFO] [stdout] note: if you're trying to build a new `MaybeUninit<_>` consider using one of the following associated functions:
[INFO] [stdout]       MaybeUninit::<T>::new
[INFO] [stdout]       MaybeUninit::<T>::uninit
[INFO] [stdout]       MaybeUninit::<T>::zeroed
[INFO] [stdout]    --> /rustc/c2e32f1c9652b13ed99608599c1e855462f421f3/library/core/src/mem/maybe_uninit.rs:391:4
[INFO] [stdout] help: there is a method `assume_init_ref` with a similar name, but with different arguments
[INFO] [stdout]    --> /rustc/c2e32f1c9652b13ed99608599c1e855462f421f3/library/core/src/mem/maybe_uninit.rs:870:4
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `front-vec` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "959fe86414d6c6217c1201b4438acbafd9ea0c19c09c7b82a24d78b9df4e74e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "959fe86414d6c6217c1201b4438acbafd9ea0c19c09c7b82a24d78b9df4e74e8", kill_on_drop: false }`
[INFO] [stdout] 959fe86414d6c6217c1201b4438acbafd9ea0c19c09c7b82a24d78b9df4e74e8