[INFO] crate maskerad_memory_allocators 5.2.0 is already in cache
[INFO] extracting crate maskerad_memory_allocators 5.2.0 into work/ex/beta-1.38-1/sources/1.37.0/reg/maskerad_memory_allocators/5.2.0
[INFO] extracting crate maskerad_memory_allocators 5.2.0 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/maskerad_memory_allocators/5.2.0
[INFO] validating manifest of maskerad_memory_allocators-5.2.0 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 maskerad_memory_allocators-5.2.0 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 maskerad_memory_allocators-5.2.0
[INFO] finished frobbing maskerad_memory_allocators-5.2.0
[INFO] frobbed toml for maskerad_memory_allocators-5.2.0 written to work/ex/beta-1.38-1/sources/1.37.0/reg/maskerad_memory_allocators/5.2.0/Cargo.toml
[INFO] started frobbing maskerad_memory_allocators-5.2.0
[INFO] finished frobbing maskerad_memory_allocators-5.2.0
[INFO] frobbed toml for maskerad_memory_allocators-5.2.0 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/maskerad_memory_allocators/5.2.0/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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing maskerad_memory_allocators-5.2.0 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/reg/maskerad_memory_allocators/5.2.0:/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] 994390f02368cc1d4e571c088e25e474ef2e1870576c673d5a3aceb8addec673
[INFO] running `"docker" "start" "-a" "994390f02368cc1d4e571c088e25e474ef2e1870576c673d5a3aceb8addec673"`
[INFO] [stderr]    Compiling maskerad_memory_allocators v5.2.0 (/opt/crater/workdir)
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> src/lib.rs:92:1
[INFO] [stderr]    |
[INFO] [stderr] 92 | #![feature(alloc)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> src/lib.rs:93:1
[INFO] [stderr]    |
[INFO] [stderr] 93 | #![feature(raw)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: #![feature] may not be used on the stable release channel
[INFO] [stderr]   --> src/lib.rs:94:1
[INFO] [stderr]    |
[INFO] [stderr] 94 | #![feature(core_intrinsics)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/allocation_error.rs:43:32
[INFO] [stderr]    |
[INFO] [stderr] 43 |     fn cause(&self) -> Option<&Error> {
[INFO] [stderr]    |                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/utils.rs:49:33
[INFO] [stderr]    |
[INFO] [stderr] 49 |     let obj = mem::transmute::<&AllTypes, TraitObject>(ptr);
[INFO] [stderr]    |                                 ^^^^^^^^ help: use `dyn`: `dyn AllTypes`
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'raw_vec_internals': implementation detail
[INFO] [stderr]  --> src/memory_chunk.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 | use alloc::raw_vec::RawVec;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'raw_vec_internals': implementation detail
[INFO] [stderr]   --> src/memory_chunk.rs:33:14
[INFO] [stderr]    |
[INFO] [stderr] 33 |     storage: RawVec<u8>,
[INFO] [stderr]    |              ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'raw_vec_internals': implementation detail
[INFO] [stderr]   --> src/memory_chunk.rs:49:22
[INFO] [stderr]    |
[INFO] [stderr] 49 |             storage: RawVec::with_capacity(size),
[INFO] [stderr]    |                      ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'raw_vec_internals': implementation detail
[INFO] [stderr]   --> src/memory_chunk.rs:40:95
[INFO] [stderr]    |
[INFO] [stderr] 40 |         write!(f, "MemoryChunk [Max capacity: {} bytes, Memory used: {} bytes]", self.storage.cap(), self.fill.get())
[INFO] [stderr]    |                                                                                               ^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'raw_vec_internals': implementation detail
[INFO] [stderr]   --> src/memory_chunk.rs:69:22
[INFO] [stderr]    |
[INFO] [stderr] 69 |         self.storage.cap()
[INFO] [stderr]    |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: use of unstable library feature 'raw_vec_internals': implementation detail
[INFO] [stderr]   --> src/memory_chunk.rs:75:22
[INFO] [stderr]    |
[INFO] [stderr] 75 |         self.storage.ptr()
[INFO] [stderr]    |                      ^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 9 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0554, E0658.
[INFO] [stderr] For more information about an error, try `rustc --explain E0554`.
[INFO] [stderr] error: Could not compile `maskerad_memory_allocators`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "994390f02368cc1d4e571c088e25e474ef2e1870576c673d5a3aceb8addec673"`
[INFO] running `"docker" "rm" "-f" "994390f02368cc1d4e571c088e25e474ef2e1870576c673d5a3aceb8addec673"`
[INFO] [stdout] 994390f02368cc1d4e571c088e25e474ef2e1870576c673d5a3aceb8addec673