[INFO] crate membuf 0.0.5 is already in cache
[INFO] extracting crate membuf 0.0.5 into work/ex/beta-1.38-1/sources/1.37.0/reg/membuf/0.0.5
[INFO] extracting crate membuf 0.0.5 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/membuf/0.0.5
[INFO] validating manifest of membuf-0.0.5 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 membuf-0.0.5 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 membuf-0.0.5
[INFO] finished frobbing membuf-0.0.5
[INFO] frobbed toml for membuf-0.0.5 written to work/ex/beta-1.38-1/sources/1.37.0/reg/membuf/0.0.5/Cargo.toml
[INFO] started frobbing membuf-0.0.5
[INFO] finished frobbing membuf-0.0.5
[INFO] frobbed toml for membuf-0.0.5 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/membuf/0.0.5/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing membuf-0.0.5 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-7/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/membuf/0.0.5:/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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 1cdb3ba0a3eec450c8b031e57594953aa2e9e329b502c6c66efcb96e3e7b5678
[INFO] running `"docker" "start" "-a" "1cdb3ba0a3eec450c8b031e57594953aa2e9e329b502c6c66efcb96e3e7b5678"`
[INFO] [stderr]    Compiling membuf v0.0.5 (/opt/crater/workdir)
[INFO] [stderr] warning: lint `raw_pointer_derive` has been removed: `using derive with raw pointers is ok`
[INFO] [stderr]  --> src/lib.rs:4:10
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![allow(raw_pointer_derive)]
[INFO] [stderr]   |          ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(renamed_and_removed_lints)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `core::nonzero`
[INFO] [stderr]   --> src/lib.rs:15:11
[INFO] [stderr]    |
[INFO] [stderr] 15 | use core::nonzero::NonZero;
[INFO] [stderr]    |           ^^^^^^^ could not find `nonzero` in `core`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `core::nonzero`
[INFO] [stderr]  --> src/alloc.rs:8:11
[INFO] [stderr]   |
[INFO] [stderr] 8 | use core::nonzero::NonZero;
[INFO] [stderr]   |           ^^^^^^^ could not find `nonzero` in `core`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `std::rt::heap`
[INFO] [stderr]  --> src/alloc.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use std::rt::heap;
[INFO] [stderr]   |     ^^^^^^^^^^^^^ no `heap` in `rt`
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `oom` in crate `alloc`
[INFO] [stderr]   --> src/alloc.rs:20:31
[INFO] [stderr]    |
[INFO] [stderr] 20 |     if ptr.is_null() { alloc::oom() }
[INFO] [stderr]    |                               ^^^ not found in `alloc`
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find function `oom` in crate `alloc`
[INFO] [stderr]   --> src/alloc.rs:40:16
[INFO] [stderr]    |
[INFO] [stderr] 40 |         alloc::oom()
[INFO] [stderr]    |                ^^^ not found in `alloc`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stderr]  --> src/lib.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | #![feature(core, nonzero, alloc, oom, heap_api)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0392]: parameter `T` is never used
[INFO] [stderr]   --> src/unique.rs:19:22
[INFO] [stderr]    |
[INFO] [stderr] 19 | pub struct UniqueBuf<T> {
[INFO] [stderr]    |                      ^ unused parameter
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing `T` or using a marker such as `std::marker::PhantomData`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 7 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0392, E0425, E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0392`.
[INFO] [stderr] error: Could not compile `membuf`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "1cdb3ba0a3eec450c8b031e57594953aa2e9e329b502c6c66efcb96e3e7b5678"`
[INFO] running `"docker" "rm" "-f" "1cdb3ba0a3eec450c8b031e57594953aa2e9e329b502c6c66efcb96e3e7b5678"`
[INFO] [stdout] 1cdb3ba0a3eec450c8b031e57594953aa2e9e329b502c6c66efcb96e3e7b5678