[INFO] updating cached repository Jereq/Rust-linked-list
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/Jereq/Rust-linked-list
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/Jereq/Rust-linked-list" "work/ex/beta-1.38-1/sources/1.37.0/gh/Jereq/Rust-linked-list"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/Jereq/Rust-linked-list'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/Jereq/Rust-linked-list" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Jereq/Rust-linked-list"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Jereq/Rust-linked-list'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 74f63213efaa95b0467c5c1730576cd7ebc804b4
[INFO] sha for GitHub repo Jereq/Rust-linked-list: 74f63213efaa95b0467c5c1730576cd7ebc804b4
[INFO] validating manifest of Jereq/Rust-linked-list on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of Jereq/Rust-linked-list on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing Jereq/Rust-linked-list
[INFO] finished frobbing Jereq/Rust-linked-list
[INFO] frobbed toml for Jereq/Rust-linked-list written to work/ex/beta-1.38-1/sources/1.37.0/gh/Jereq/Rust-linked-list/Cargo.toml
[INFO] started frobbing Jereq/Rust-linked-list
[INFO] finished frobbing Jereq/Rust-linked-list
[INFO] frobbed toml for Jereq/Rust-linked-list written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/Jereq/Rust-linked-list/Cargo.toml
[INFO] crate Jereq/Rust-linked-list already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing Jereq/Rust-linked-list against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/Jereq/Rust-linked-list:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] bc7036e75a00f11f580c958f8be3c2218c101ed8c0c3ccf0fe0fc1c8477e354a
[INFO] running `"docker" "start" "-a" "bc7036e75a00f11f580c958f8be3c2218c101ed8c0c3ccf0fe0fc1c8477e354a"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling linked_circular_buffer v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0425]: cannot find function `into_raw` in module `std::boxed`
[INFO] [stderr]    --> src/main.rs:208:31
[INFO] [stderr]     |
[INFO] [stderr] 208 |         let nn = unsafe{std::boxed::into_raw(n)};
[INFO] [stderr]     |                                     ^^^^^^^^ not found in `std::boxed`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(alloc)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0425, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0425`.
[INFO] [stderr] error: Could not compile `linked_circular_buffer`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "bc7036e75a00f11f580c958f8be3c2218c101ed8c0c3ccf0fe0fc1c8477e354a"`
[INFO] running `"docker" "rm" "-f" "bc7036e75a00f11f580c958f8be3c2218c101ed8c0c3ccf0fe0fc1c8477e354a"`
[INFO] [stdout] bc7036e75a00f11f580c958f8be3c2218c101ed8c0c3ccf0fe0fc1c8477e354a