[INFO] fetching crate array-vec 0.1.3...
[INFO] testing array-vec-0.1.3 against try#ecabaf78506b7a4668d42dc20268c086b93f0fad for pr-87041
[INFO] extracting crate array-vec 0.1.3 into /workspace/builds/worker-7/source
[INFO] validating manifest of crates.io crate array-vec 0.1.3 on toolchain ecabaf78506b7a4668d42dc20268c086b93f0fad
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate array-vec 0.1.3
[INFO] finished tweaking crates.io crate array-vec 0.1.3
[INFO] tweaked toml for crates.io crate array-vec 0.1.3 written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 83abeadc05802fcf5140b61e1f0318a67ea0ffca810f010728937a529bb2384f
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "83abeadc05802fcf5140b61e1f0318a67ea0ffca810f010728937a529bb2384f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "83abeadc05802fcf5140b61e1f0318a67ea0ffca810f010728937a529bb2384f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83abeadc05802fcf5140b61e1f0318a67ea0ffca810f010728937a529bb2384f", kill_on_drop: false }`
[INFO] [stdout] 83abeadc05802fcf5140b61e1f0318a67ea0ffca810f010728937a529bb2384f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+ecabaf78506b7a4668d42dc20268c086b93f0fad" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] e2c2ab282c8c25eca4e9420d0af386b397aaa0d12ba653b6da1aa45c354d384d
[INFO] running `Command { std: "docker" "start" "-a" "e2c2ab282c8c25eca4e9420d0af386b397aaa0d12ba653b6da1aa45c354d384d", kill_on_drop: false }`
[INFO] [stderr]    Compiling array-vec v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: the feature `const_generics` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_generics, specialization, maybe_uninit_extra, maybe_uninit_slice)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout]   = note: see issue #44580 <https://github.com/rust-lang/rust/issues/44580> for more information
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]  --> src/lib.rs:1:28
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(const_generics, specialization, maybe_uninit_extra, maybe_uninit_slice)]
[INFO] [stdout]   |                            ^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]   = help: consider using `min_specialization` instead, which is more stable and complete
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `first_ptr` found for union `MaybeUninit` in the current scope
[INFO] [stdout]   --> src/lib.rs:36:22
[INFO] [stdout]    |
[INFO] [stdout] 36 |         MaybeUninit::first_ptr(&self.arr)
[INFO] [stdout]    |                      ^^^^^^^^^ function or associated item not found in `MaybeUninit<_>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `first_ptr_mut` found for union `MaybeUninit` in the current scope
[INFO] [stdout]   --> src/lib.rs:41:22
[INFO] [stdout]    |
[INFO] [stdout] 41 |         MaybeUninit::first_ptr_mut(&mut self.arr)
[INFO] [stdout]    |                      ^^^^^^^^^^^^^ function or associated item not found in `MaybeUninit<_>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `array-vec`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "e2c2ab282c8c25eca4e9420d0af386b397aaa0d12ba653b6da1aa45c354d384d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e2c2ab282c8c25eca4e9420d0af386b397aaa0d12ba653b6da1aa45c354d384d", kill_on_drop: false }`
[INFO] [stdout] e2c2ab282c8c25eca4e9420d0af386b397aaa0d12ba653b6da1aa45c354d384d