[INFO] crate wfbuf 0.1.1 is already in cache
[INFO] testing wfbuf-0.1.1 against 1.44.0 for beta-1.45-1
[INFO] extracting crate wfbuf 0.1.1 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate wfbuf 0.1.1 on toolchain 1.44.0
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate wfbuf 0.1.1
[INFO] finished tweaking crates.io crate wfbuf 0.1.1
[INFO] tweaked toml for crates.io crate wfbuf 0.1.1 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1.44.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+1.44.0" "build" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 49f559edb2302070c93aef49071b99a0e6ec61b67a39daab166f39ae5707d22a
[INFO] running `"docker" "start" "-a" "49f559edb2302070c93aef49071b99a0e6ec61b67a39daab166f39ae5707d22a"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling mmap v0.1.1
[INFO] [stderr]    Compiling wfbuf v0.1.1 (/opt/rustwide/workdir)
[INFO] [stderr] error: expected expression, found keyword `in`
[INFO] [stderr]   --> src/lib.rs:89:3
[INFO] [stderr]    |
[INFO] [stderr] 89 |         in MMSHARED { WfBuf::<T>::new() }
[INFO] [stderr]    |         ^^ expected expression
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved imports `std::ops::Place`, `std::ops::InPlace`, `std::ops::Placer`
[INFO] [stderr]  --> src/lib.rs:4:16
[INFO] [stderr]   |
[INFO] [stderr] 4 | use std::ops::{Place, InPlace, Placer};
[INFO] [stderr]   |                ^^^^^  ^^^^^^^  ^^^^^^ no `Placer` in `ops`
[INFO] [stderr]   |                |      |
[INFO] [stderr]   |                |      no `InPlace` in `ops`
[INFO] [stderr]   |                no `Place` in `ops`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(placement_in_syntax, placement_new_protocol, unique)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals': use `NonNull` instead and consider `PhantomData<T>` (if you also use `#[may_dangle]`), `Send`, and/or `Sync`
[INFO] [stderr]  --> src/lib.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use std::ptr::Unique;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'ptr_internals': use `NonNull` instead and consider `PhantomData<T>` (if you also use `#[may_dangle]`), `Send`, and/or `Sync`
[INFO] [stderr]   --> src/lib.rs:78:7
[INFO] [stderr]    |
[INFO] [stderr] 78 |     ptr: Unique<T>
[INFO] [stderr]    |          ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 5 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: could not compile `wfbuf`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "49f559edb2302070c93aef49071b99a0e6ec61b67a39daab166f39ae5707d22a"`
[INFO] running `"docker" "rm" "-f" "49f559edb2302070c93aef49071b99a0e6ec61b67a39daab166f39ae5707d22a"`
[INFO] [stdout] 49f559edb2302070c93aef49071b99a0e6ec61b67a39daab166f39ae5707d22a