[INFO] fetching crate const-combinations 2.0.3...
[INFO] testing const-combinations-2.0.3 against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] extracting crate const-combinations 2.0.3 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate const-combinations 2.0.3
[INFO] finished tweaking crates.io crate const-combinations 2.0.3
[INFO] tweaked toml for crates.io crate const-combinations 2.0.3 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate const-combinations 2.0.3 on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "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" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 886cd10f7014deb5dfcd1356deba59e1c904fd697713d5110ca31f68dfcc90a5
[INFO] running `Command { std: "docker" "start" "-a" "886cd10f7014deb5dfcd1356deba59e1c904fd697713d5110ca31f68dfcc90a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "886cd10f7014deb5dfcd1356deba59e1c904fd697713d5110ca31f68dfcc90a5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "886cd10f7014deb5dfcd1356deba59e1c904fd697713d5110ca31f68dfcc90a5", kill_on_drop: false }`
[INFO] [stdout] 886cd10f7014deb5dfcd1356deba59e1c904fd697713d5110ca31f68dfcc90a5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ce6da2c2c511dd89e105782041171c724c51ee047b77bc2acc065d8a42a90107
[INFO] running `Command { std: "docker" "start" "-a" "ce6da2c2c511dd89e105782041171c724c51ee047b77bc2acc065d8a42a90107", kill_on_drop: false }`
[INFO] [stderr]    Compiling const-combinations v2.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0635]: unknown feature `maybe_uninit_uninit_array`
[INFO] [stdout]   --> src/lib.rs:17:12
[INFO] [stdout]    |
[INFO] [stdout] 17 | #![feature(maybe_uninit_uninit_array)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no function or associated item named `uninit_array` found for union `MaybeUninit<T>` in the current scope
[INFO] [stdout]    --> src/lib.rs:191:53
[INFO] [stdout]     |
[INFO] [stdout] 191 |     let mut out: [MaybeUninit<T>; N] = MaybeUninit::uninit_array();
[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::<T>::new
[INFO] [stdout]       MaybeUninit::<T>::uninit
[INFO] [stdout]       MaybeUninit::<T>::zeroed
[INFO] [stdout]    --> /rustc/cdb45c87e2cd43495379f7e867e3cc15dcee9f93/library/core/src/mem/maybe_uninit.rs:307:5
[INFO] [stdout] help: there is an associated function `uninit` with a similar name
[INFO] [stdout]     |
[INFO] [stdout] 191 -     let mut out: [MaybeUninit<T>; N] = MaybeUninit::uninit_array();
[INFO] [stdout] 191 +     let mut out: [MaybeUninit<T>; N] = MaybeUninit::uninit();
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0599, E0635.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `const-combinations` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "ce6da2c2c511dd89e105782041171c724c51ee047b77bc2acc065d8a42a90107", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce6da2c2c511dd89e105782041171c724c51ee047b77bc2acc065d8a42a90107", kill_on_drop: false }`
[INFO] [stdout] ce6da2c2c511dd89e105782041171c724c51ee047b77bc2acc065d8a42a90107