[INFO] updating cached repository https://github.com/ppedrot/kravanenn
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/big/crater/work/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 61f089e2091d1f0c4eb57b2617532e7bee63508d
[INFO] testing ppedrot/kravanenn against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fppedrot%2Fkravanenn" "work/builds/worker-4/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ppedrot/kravanenn on toolchain 1.38.0
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/ppedrot/kravanenn
[INFO] finished tweaking git repo https://github.com/ppedrot/kravanenn
[INFO] tweaked toml for git repo https://github.com/ppedrot/kravanenn written to work/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/ppedrot/kravanenn already has a lockfile, it will not be regenerated
[INFO] running `"/big/crater/work/cargo-home/bin/cargo" "+1.38.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/big/crater/work/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-4/source:/opt/rustwide/workdir:ro,Z" "-v" "/big/crater/work/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/big/crater/work/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=1000" "-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" "+1.38.0" "build" "--frozen"`
[INFO] [stdout] be1e3ad6bcba202e41381124283aec6cdf9fd5a1ac88b5cd8346f21b5ab729f8
[INFO] running `"docker" "start" "-a" "be1e3ad6bcba202e41381124283aec6cdf9fd5a1ac88b5cd8346f21b5ab729f8"`
[INFO] [stderr]    Compiling crossbeam v0.3.0
[INFO] [stderr]    Compiling smallvec v0.5.0
[INFO] [stderr]    Compiling light_arena v0.1.1
[INFO] [stderr]    Compiling lazy-init v0.2.0
[INFO] [stderr]    Compiling movecell v0.2.0
[INFO] [stderr]    Compiling num_cpus v0.2.13
[INFO] [stderr]    Compiling serde_state v0.4.1
[INFO] [stderr]    Compiling serde_derive_state_internals v0.4.0
[INFO] [stderr]    Compiling rayon v0.9.0
[INFO] [stderr] error[E0432]: unresolved imports `std::ops::Placer`, `std::ops::Place`, `std::ops::InPlace`
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/light_arena-0.1.1/src/lib.rs:80:16
[INFO] [stderr]    |
[INFO] [stderr] 80 | use std::ops::{Placer, Place, InPlace};
[INFO] [stderr]    |                ^^^^^^  ^^^^^  ^^^^^^^ no `InPlace` in `ops`
[INFO] [stderr]    |                |       |
[INFO] [stderr]    |                |       no `Place` in `ops`
[INFO] [stderr]    |                no `Placer` in `ops`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/light_arena-0.1.1/src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(placement_in_syntax, placement_new_protocol)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `light_arena`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "be1e3ad6bcba202e41381124283aec6cdf9fd5a1ac88b5cd8346f21b5ab729f8"`
[INFO] running `"docker" "rm" "-f" "be1e3ad6bcba202e41381124283aec6cdf9fd5a1ac88b5cd8346f21b5ab729f8"`
[INFO] [stdout] be1e3ad6bcba202e41381124283aec6cdf9fd5a1ac88b5cd8346f21b5ab729f8