[INFO] updating cached repository plutolove/rust-datastructure
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/plutolove/rust-datastructure
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/plutolove/rust-datastructure" "work/ex/beta-1.38-1/sources/1.37.0/gh/plutolove/rust-datastructure"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/plutolove/rust-datastructure'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/plutolove/rust-datastructure" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/plutolove/rust-datastructure"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/plutolove/rust-datastructure'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] d448b7dbb5e51719be8a79b161af29c949a64ce2
[INFO] sha for GitHub repo plutolove/rust-datastructure: d448b7dbb5e51719be8a79b161af29c949a64ce2
[INFO] validating manifest of plutolove/rust-datastructure 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 plutolove/rust-datastructure 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 plutolove/rust-datastructure
[INFO] finished frobbing plutolove/rust-datastructure
[INFO] frobbed toml for plutolove/rust-datastructure written to work/ex/beta-1.38-1/sources/1.37.0/gh/plutolove/rust-datastructure/Cargo.toml
[INFO] started frobbing plutolove/rust-datastructure
[INFO] finished frobbing plutolove/rust-datastructure
[INFO] frobbed toml for plutolove/rust-datastructure written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/plutolove/rust-datastructure/Cargo.toml
[INFO] crate plutolove/rust-datastructure 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 plutolove/rust-datastructure 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/plutolove/rust-datastructure:/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] fb7a04077aa0b504028335c56023d727e0a7026e44b8d1f8a8a9cfdd386efd21
[INFO] running `"docker" "start" "-a" "fb7a04077aa0b504028335c56023d727e0a7026e44b8d1f8a8a9cfdd386efd21"`
[INFO] [stderr]    Compiling data-structure v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved import `std::heap`
[INFO] [stderr]  --> src/collections/vector.rs:5:10
[INFO] [stderr]   |
[INFO] [stderr] 5 | use std::heap::{Alloc, Layout, Heap, oom};
[INFO] [stderr]   |          ^^^^ could not find `heap` in `std`
[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(box_into_raw_non_null)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #![feature(dropck_eyepatch)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![feature(ptr_internals)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(allocator_api)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]  --> src/lib.rs:5:1
[INFO] [stderr]   |
[INFO] [stderr] 5 | #![feature(unique)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `as_opaque` found for type `std::ptr::NonNull<T>` in the current scope
[INFO] [stderr]   --> src/collections/vector.rs:35:69
[INFO] [stderr]    |
[INFO] [stderr] 35 |                     let nptr = Heap.realloc(NonNull::from(self.ptr).as_opaque(), layout, cap * elem_size);
[INFO] [stderr]    |                                                                     ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no method named `as_opaque` found for type `std::ptr::NonNull<T>` in the current scope
[INFO] [stderr]   --> src/collections/vector.rs:63:62
[INFO] [stderr]    |
[INFO] [stderr] 63 |                 unsafe {Heap.dealloc(NonNull::from(self.ptr).as_opaque(), layout);}
[INFO] [stderr]    |                                                              ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 8 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0554, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `data-structure`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "fb7a04077aa0b504028335c56023d727e0a7026e44b8d1f8a8a9cfdd386efd21"`
[INFO] running `"docker" "rm" "-f" "fb7a04077aa0b504028335c56023d727e0a7026e44b8d1f8a8a9cfdd386efd21"`
[INFO] [stdout] fb7a04077aa0b504028335c56023d727e0a7026e44b8d1f8a8a9cfdd386efd21