[INFO] fetching crate const-buffer 0.1.2...
[INFO] testing const-buffer-0.1.2 against 1.47.0 for beta-1.48-1
[INFO] extracting crate const-buffer 0.1.2 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate const-buffer 0.1.2 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate const-buffer 0.1.2
[INFO] finished tweaking crates.io crate const-buffer 0.1.2
[INFO] tweaked toml for crates.io crate const-buffer 0.1.2 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 46286ad9728587752480e00f985638c747194807915b551e46cb912241138768
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "46286ad9728587752480e00f985638c747194807915b551e46cb912241138768", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "46286ad9728587752480e00f985638c747194807915b551e46cb912241138768", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "46286ad9728587752480e00f985638c747194807915b551e46cb912241138768", kill_on_drop: false }`
[INFO] [stdout] 46286ad9728587752480e00f985638c747194807915b551e46cb912241138768
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 12f711a0a5dbbf7b01177f08ec5afc7164f21683ba971b1a41fe99890e0e02c7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "12f711a0a5dbbf7b01177f08ec5afc7164f21683ba971b1a41fe99890e0e02c7", kill_on_drop: false }`
[INFO] [stderr]    Compiling const-buffer v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:62:1
[INFO] [stdout]    |
[INFO] [stdout] 62 | / #![feature(
[INFO] [stdout] 63 | |     associated_type_bounds,
[INFO] [stdout] 64 | |     const_fn_union,
[INFO] [stdout] 65 | |     min_const_generics,
[INFO] [stdout] ...  |
[INFO] [stdout] 70 | |     untagged_unions
[INFO] [stdout] 71 | | )]
[INFO] [stdout]    | |__^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `assume_init_read` found for reference `&core::mem::MaybeUninit<T>` in the current scope
[INFO] [stdout]    --> src/lib.rs:255:37
[INFO] [stdout]     |
[INFO] [stdout] 255 |         self.0.get_unchecked(index).assume_init_read()
[INFO] [stdout]     |                                     ^^^^^^^^^^^^^^^^ help: there is an associated function with a similar name: `assume_init`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `assume_init_ref` found for reference `&core::mem::MaybeUninit<T>` in the current scope
[INFO] [stdout]    --> src/lib.rs:916:14
[INFO] [stdout]     |
[INFO] [stdout] 916 |         self.assume_init_ref()
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^ help: there is an associated function with a similar name: `assume_init`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `assume_init_mut` found for mutable reference `&mut core::mem::MaybeUninit<T>` in the current scope
[INFO] [stdout]    --> src/lib.rs:920:14
[INFO] [stdout]     |
[INFO] [stdout] 920 |         self.assume_init_mut()
[INFO] [stdout]     |              ^^^^^^^^^^^^^^^ help: there is an associated function with a similar name: `assume_init`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `slice_assume_init_ref` found for union `core::mem::MaybeUninit<_>` in the current scope
[INFO] [stdout]    --> src/lib.rs:928:22
[INFO] [stdout]     |
[INFO] [stdout] 928 |         MaybeUninit::slice_assume_init_ref(self)
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^ function or associated item not found in `core::mem::MaybeUninit<_>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `slice_assume_init_mut` found for union `core::mem::MaybeUninit<_>` in the current scope
[INFO] [stdout]    --> src/lib.rs:932:22
[INFO] [stdout]     |
[INFO] [stdout] 932 |         MaybeUninit::slice_assume_init_mut(self)
[INFO] [stdout]     |                      ^^^^^^^^^^^^^^^^^^^^^ function or associated item not found in `core::mem::MaybeUninit<_>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 6 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0554, E0599.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `const-buffer`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "12f711a0a5dbbf7b01177f08ec5afc7164f21683ba971b1a41fe99890e0e02c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "12f711a0a5dbbf7b01177f08ec5afc7164f21683ba971b1a41fe99890e0e02c7", kill_on_drop: false }`
[INFO] [stdout] 12f711a0a5dbbf7b01177f08ec5afc7164f21683ba971b1a41fe99890e0e02c7
