[INFO] updating cached repository https://github.com/miyamofigo/rust-shared-ptr
[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] 4935e3eb4a41b6a03fa22706a0f1cd51bcb81496
[INFO] testing miyamofigo/rust-shared-ptr against 1.38.0 for beta-1.39-1
[INFO] running `"git" "clone" "work/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmiyamofigo%2Frust-shared-ptr" "work/builds/worker-2/source"`
[INFO] [stderr] Cloning into 'work/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/miyamofigo/rust-shared-ptr 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/miyamofigo/rust-shared-ptr
[INFO] finished tweaking git repo https://github.com/miyamofigo/rust-shared-ptr
[INFO] tweaked toml for git repo https://github.com/miyamofigo/rust-shared-ptr written to work/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/miyamofigo/rust-shared-ptr 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-2/target:/opt/rustwide/target:rw,Z" "-v" "/big/crater/work/builds/worker-2/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] 735304795e979fc0b4a94ba5230f96618948f90756ce98bd26d5f82566efcda0
[INFO] running `"docker" "start" "-a" "735304795e979fc0b4a94ba5230f96618948f90756ce98bd26d5f82566efcda0"`
[INFO] [stderr]    Compiling shared v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0432]: unresolved import `core::nonzero`
[INFO] [stderr]   --> src/lib.rs:31:11
[INFO] [stderr]    |
[INFO] [stderr] 31 | use core::nonzero::NonZero;
[INFO] [stderr]    |           ^^^^^^^ could not find `nonzero` in `core`
[INFO] [stderr] 
[INFO] [stderr] error[E0432]: unresolved import `alloc::heap`
[INFO] [stderr]   --> src/lib.rs:35:12
[INFO] [stderr]    |
[INFO] [stderr] 35 | use alloc::heap::deallocate;
[INFO] [stderr]    |            ^^^^ could not find `heap` in `alloc`
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `POST_DROP_USIZE` in module `mem`
[INFO] [stderr]    --> src/lib.rs:155:45
[INFO] [stderr]     |
[INFO] [stderr] 155 |           ptr as *const () as usize != mem::POST_DROP_USIZE {
[INFO] [stderr]     |                                             ^^^^^^^^^^^^^^^ not found in `mem`
[INFO] [stderr] 
[INFO] [stderr] error[E0425]: cannot find value `POST_DROP_USIZE` in module `mem`
[INFO] [stderr]    --> src/lib.rs:354:43
[INFO] [stderr]     |
[INFO] [stderr] 354 |         ptr as *const () as usize != mem::POST_DROP_USIZE {
[INFO] [stderr]     |                                           ^^^^^^^^^^^^^^^ not found in `mem`
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> src/lib.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | #![feature(core, nonzero, alloc, unsize)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> src/lib.rs:11:1
[INFO] [stderr]    |
[INFO] [stderr] 11 | #![feature(heap_api, filling_drop)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> src/lib.rs:12:1
[INFO] [stderr]    |
[INFO] [stderr] 12 | #![feature(optin_builtin_traits)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> src/lib.rs:13:1
[INFO] [stderr]    |
[INFO] [stderr] 13 | #![feature(box_syntax, box_raw)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stderr]   --> src/lib.rs:14:1
[INFO] [stderr]    |
[INFO] [stderr] 14 | #![feature(coerce_unsized, core_intrinsics)]
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0374]: the trait `CoerceUnsized` may only be implemented for a coercion between structures with one field being coerced, none found
[INFO] [stderr]   --> src/lib.rs:50:1
[INFO] [stderr]    |
[INFO] [stderr] 50 | impl<T: ?Sized+Unsize<U>, U: ?Sized> CoerceUnsized<Shared<U>> for Shared<T> {}
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0374]: the trait `CoerceUnsized` may only be implemented for a coercion between structures with one field being coerced, none found
[INFO] [stderr]    --> src/lib.rs:320:1
[INFO] [stderr]     |
[INFO] [stderr] 320 | impl<T: ?Sized+Unsize<U>, U: ?Sized> CoerceUnsized<Weak2<U>> for Weak2<T> {}
[INFO] [stderr]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 11 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0374, E0425, E0432, E0554.
[INFO] [stderr] For more information about an error, try `rustc --explain E0374`.
[INFO] [stderr] error: Could not compile `shared`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "735304795e979fc0b4a94ba5230f96618948f90756ce98bd26d5f82566efcda0"`
[INFO] running `"docker" "rm" "-f" "735304795e979fc0b4a94ba5230f96618948f90756ce98bd26d5f82566efcda0"`
[INFO] [stdout] 735304795e979fc0b4a94ba5230f96618948f90756ce98bd26d5f82566efcda0