[INFO] fetching crate front-vec 0.0.8... [INFO] testing front-vec-0.0.8 against try#dec9417b8611e34e787a3e4c37686b5131f9e5c5 for pr-154210-1 [INFO] extracting crate front-vec 0.0.8 into /workspace/builds/worker-2-tc2/source [INFO] started tweaking crates.io crate front-vec 0.0.8 [INFO] finished tweaking crates.io crate front-vec 0.0.8 [INFO] tweaked toml for crates.io crate front-vec 0.0.8 written to /workspace/builds/worker-2-tc2/source/Cargo.toml [INFO] validating manifest of crates.io crate front-vec 0.0.8 on toolchain dec9417b8611e34e787a3e4c37686b5131f9e5c5 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Updating crates.io index [INFO] [stderr] Locking 10 packages to latest compatible versions [INFO] [stderr] Adding assert2 v0.3.16 (available: v0.4.0) [INFO] [stderr] Adding assert2-macros v0.3.16 (available: v0.3.18) [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] a115fdf3de16474efc9c3c5816d082bf37a18ef0fb1e79def41c936e4c7081fa [INFO] running `Command { std: "docker" "start" "-a" "a115fdf3de16474efc9c3c5816d082bf37a18ef0fb1e79def41c936e4c7081fa", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "a115fdf3de16474efc9c3c5816d082bf37a18ef0fb1e79def41c936e4c7081fa", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "a115fdf3de16474efc9c3c5816d082bf37a18ef0fb1e79def41c936e4c7081fa", kill_on_drop: false }` [INFO] [stdout] a115fdf3de16474efc9c3c5816d082bf37a18ef0fb1e79def41c936e4c7081fa [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+dec9417b8611e34e787a3e4c37686b5131f9e5c5" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 8caf79df5909e1f5ad6d49ea70c57aa74d7a28394136fe0e12e51d4fc0d4a6c2 [INFO] running `Command { std: "docker" "start" "-a" "8caf79df5909e1f5ad6d49ea70c57aa74d7a28394136fe0e12e51d4fc0d4a6c2", kill_on_drop: false }` [INFO] [stderr] Compiling front-vec v0.0.8 (/opt/rustwide/workdir) [INFO] [stdout] warning: the feature `ptr_internals` is internal to the compiler or standard library [INFO] [stdout] --> src/lib.rs:1:12 [INFO] [stdout] | [INFO] [stdout] 1 | #![feature(ptr_internals, maybe_uninit_slice)] [INFO] [stdout] | ^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: using it is strongly discouraged [INFO] [stdout] = note: `#[warn(internal_features)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: the feature `maybe_uninit_slice` has been stable since 1.93.0 and no longer requires an attribute to enable [INFO] [stdout] --> src/lib.rs:1:27 [INFO] [stdout] | [INFO] [stdout] 1 | #![feature(ptr_internals, maybe_uninit_slice)] [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(stable_features)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] error[E0599]: no function or associated item named `slice_assume_init_ref` found for union `MaybeUninit` in the current scope [INFO] [stdout] --> src/front_vec/front_vec.rs:305:31 [INFO] [stdout] | [INFO] [stdout] 305 | unsafe { MaybeUninit::slice_assume_init_ref(slice) } [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ function or associated item not found in `MaybeUninit<_>` [INFO] [stdout] | [INFO] [stdout] note: if you're trying to build a new `MaybeUninit<_>` consider using one of the following associated functions: [INFO] [stdout] MaybeUninit::::new [INFO] [stdout] MaybeUninit::::uninit [INFO] [stdout] MaybeUninit::::zeroed [INFO] [stdout] --> /rustc/dec9417b8611e34e787a3e4c37686b5131f9e5c5/library/core/src/mem/maybe_uninit.rs:406:4 [INFO] [stdout] help: there is a method `assume_init_ref` with a similar name, but with different arguments [INFO] [stdout] --> /rustc/dec9417b8611e34e787a3e4c37686b5131f9e5c5/library/core/src/mem/maybe_uninit.rs:893:4 [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] For more information about this error, try `rustc --explain E0599`. [INFO] [stdout] [INFO] [stderr] error: could not compile `front-vec` (lib) due to 1 previous error; 2 warnings emitted [INFO] running `Command { std: "docker" "inspect" "8caf79df5909e1f5ad6d49ea70c57aa74d7a28394136fe0e12e51d4fc0d4a6c2", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "8caf79df5909e1f5ad6d49ea70c57aa74d7a28394136fe0e12e51d4fc0d4a6c2", kill_on_drop: false }` [INFO] [stdout] 8caf79df5909e1f5ad6d49ea70c57aa74d7a28394136fe0e12e51d4fc0d4a6c2