[INFO] fetching crate const-buffer 0.1.2...
[INFO] checking const-buffer-0.1.2 against master#ff1737bb00913444173658b4e0b274fd79aabf66 for pr-132712-1
[INFO] extracting crate const-buffer 0.1.2 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate const-buffer 0.1.2 on toolchain ff1737bb00913444173658b4e0b274fd79aabf66
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate const-buffer 0.1.2
[INFO] finished tweaking crates.io crate const-buffer 0.1.2
[INFO] tweaked toml for crates.io crate const-buffer 0.1.2 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "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" "+ff1737bb00913444173658b4e0b274fd79aabf66" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5241f4ecaa06c287d71f838185be13c2d660e30e623ee17b8592e0e2eac82ba9
[INFO] running `Command { std: "docker" "start" "-a" "5241f4ecaa06c287d71f838185be13c2d660e30e623ee17b8592e0e2eac82ba9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5241f4ecaa06c287d71f838185be13c2d660e30e623ee17b8592e0e2eac82ba9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5241f4ecaa06c287d71f838185be13c2d660e30e623ee17b8592e0e2eac82ba9", kill_on_drop: false }`
[INFO] [stdout] 5241f4ecaa06c287d71f838185be13c2d660e30e623ee17b8592e0e2eac82ba9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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@sha256:4a844ea9eb2546a2d2c7022eacef16ef2e8229c7fbb2c7d4d55a9ceca922f72d" "/opt/rustwide/cargo-home/bin/cargo" "+ff1737bb00913444173658b4e0b274fd79aabf66" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 291f43d94682f1dda732b494df68da39247a23fbf96162f5b3503e7a22960d83
[INFO] running `Command { std: "docker" "start" "-a" "291f43d94682f1dda732b494df68da39247a23fbf96162f5b3503e7a22960d83", kill_on_drop: false }`
[INFO] [stderr]     Checking const-buffer v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]   --> src/lib.rs:70:5
[INFO] [stdout]    |
[INFO] [stdout] 70 |     untagged_unions
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]    |
[INFO] [stdout]    = note: unions with `Copy` and `ManuallyDrop` fields are stable; there is no intent to stabilize more
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]   --> src/lib.rs:70:5
[INFO] [stdout]    |
[INFO] [stdout] 70 |     untagged_unions
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]    |
[INFO] [stdout]    = note: unions with `Copy` and `ManuallyDrop` fields are stable; there is no intent to stabilize more
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0740]: field must implement `Copy` or be wrapped in `ManuallyDrop<...>` to be used in a union
[INFO] [stdout]    --> src/lib.rs:112:13
[INFO] [stdout]     |
[INFO] [stdout] 112 |             maybe_uninit: MaybeUninit<[T; N]>,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: union fields must not have drop side-effects, which is currently enforced via either `Copy` or `ManuallyDrop<...>`
[INFO] [stdout] help: wrap the field type in `ManuallyDrop<...>`
[INFO] [stdout]     |
[INFO] [stdout] 112 |             maybe_uninit: std::mem::ManuallyDrop<MaybeUninit<[T; N]>>,
[INFO] [stdout]     |                           +++++++++++++++++++++++                   +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0740]: field must implement `Copy` or be wrapped in `ManuallyDrop<...>` to be used in a union
[INFO] [stdout]    --> src/lib.rs:112:13
[INFO] [stdout]     |
[INFO] [stdout] 112 |             maybe_uninit: MaybeUninit<[T; N]>,
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: union fields must not have drop side-effects, which is currently enforced via either `Copy` or `ManuallyDrop<...>`
[INFO] [stdout] help: wrap the field type in `ManuallyDrop<...>`
[INFO] [stdout]     |
[INFO] [stdout] 112 |             maybe_uninit: std::mem::ManuallyDrop<MaybeUninit<[T; N]>>,
[INFO] [stdout]     |                           +++++++++++++++++++++++                   +
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0557, E0740.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `const-buffer` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] Some errors have detailed explanations: E0557, E0740.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `const-buffer` (lib test) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "291f43d94682f1dda732b494df68da39247a23fbf96162f5b3503e7a22960d83", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "291f43d94682f1dda732b494df68da39247a23fbf96162f5b3503e7a22960d83", kill_on_drop: false }`
[INFO] [stdout] 291f43d94682f1dda732b494df68da39247a23fbf96162f5b3503e7a22960d83