[INFO] cloning repository https://github.com/os-checker/test-flatten_objects
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/os-checker/test-flatten_objects" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fos-checker%2Ftest-flatten_objects", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fos-checker%2Ftest-flatten_objects'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e641132bc165b90da6ea450b73902f8a7be37fb3
[INFO] fixing os-checker/test-flatten_objects against try#622891a4e29178280638a6b63a8908bde2c0c854+cargoflags=-Zfix-edition=start=2015 for pr-157817-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fos-checker%2Ftest-flatten_objects" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/os-checker/test-flatten_objects
[INFO] finished tweaking git repo https://github.com/os-checker/test-flatten_objects
[INFO] tweaked toml for git repo https://github.com/os-checker/test-flatten_objects written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/os-checker/test-flatten_objects on toolchain 622891a4e29178280638a6b63a8908bde2c0c854
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/os-checker/test-flatten_objects already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bitmaps v3.2.1
[INFO] [stderr]   Downloaded flatten_objects v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/source:/opt/rustwide/workdir:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3a6becf2bc8dde7f3fa57ede90e4f284e72d296796fc446bbb1e2c7cc0530151" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 385984259b2d17ae10adf69637b13c4f04f86588337be76fdf808ebadc2d48dc
[INFO] running `Command { std: "docker" "start" "385984259b2d17ae10adf69637b13c4f04f86588337be76fdf808ebadc2d48dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "385984259b2d17ae10adf69637b13c4f04f86588337be76fdf808ebadc2d48dc" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "385984259b2d17ae10adf69637b13c4f04f86588337be76fdf808ebadc2d48dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=" "-e" "RUSTDOCFLAGS=" "-w" "/opt/rustwide/workdir" "--user" "0:0" "385984259b2d17ae10adf69637b13c4f04f86588337be76fdf808ebadc2d48dc" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "fix" "--allow-no-vcs" "--allow-dirty" "--frozen" "--all" "--all-targets" "--message-format=json" "-Zfix-edition=start=2015", kill_on_drop: false }`
[INFO] [stderr]     Checking bitmaps v3.2.1
[INFO] [stderr]     Checking flatten_objects v0.1.0
[INFO] [stdout] error[E0635]: unknown feature `maybe_uninit_uninit_array`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/flatten_objects-0.1.0/src/lib.rs:33:12
[INFO] [stdout]    |
[INFO] [stdout] 33 | #![feature(maybe_uninit_uninit_array)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `const_maybe_uninit_uninit_array`
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/flatten_objects-0.1.0/src/lib.rs:34:12
[INFO] [stdout]    |
[INFO] [stdout] 34 | #![feature(const_maybe_uninit_uninit_array)]
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] help: there is a feature with a similar name: `const_maybe_uninit_as_mut_ptr`
[INFO] [stdout]    |
[INFO] [stdout] 34 - #![feature(const_maybe_uninit_uninit_array)]
[INFO] [stdout] 34 + #![feature(const_maybe_uninit_as_mut_ptr)]
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `flatten_objects` (lib) due to 3 previous errors
[INFO] [stdout] error[E0599]: no associated function or constant named `uninit_array` found for union `MaybeUninit<T>` in the current scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/flatten_objects-0.1.0/src/lib.rs:57:35
[INFO] [stdout]    |
[INFO] [stdout] 57 |             objects: MaybeUninit::uninit_array(),
[INFO] [stdout]    |                                   ^^^^^^^^^^^^ associated function or constant 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/622891a4e29178280638a6b63a8908bde2c0c854/library/core/src/mem/maybe_uninit.rs:406:4
[INFO] [stdout] help: there is an associated function `uninit` with a similar name
[INFO] [stdout]    |
[INFO] [stdout] 57 -             objects: MaybeUninit::uninit_array(),
[INFO] [stdout] 57 +             objects: 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] running `Command { std: "docker" "inspect" "385984259b2d17ae10adf69637b13c4f04f86588337be76fdf808ebadc2d48dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "385984259b2d17ae10adf69637b13c4f04f86588337be76fdf808ebadc2d48dc", kill_on_drop: false }`
[INFO] [stdout] 385984259b2d17ae10adf69637b13c4f04f86588337be76fdf808ebadc2d48dc
