[INFO] fetching crate ndless 0.8.6...
[INFO] checking ndless-0.8.6 against try#b2c2190fa7bf856bb0ed5e8806266e3a2135c6f8 for pr-78363
[INFO] extracting crate ndless 0.8.6 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate ndless 0.8.6 on toolchain b2c2190fa7bf856bb0ed5e8806266e3a2135c6f8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2c2190fa7bf856bb0ed5e8806266e3a2135c6f8" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ndless 0.8.6
[INFO] finished tweaking crates.io crate ndless 0.8.6
[INFO] tweaked toml for crates.io crate ndless 0.8.6 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2c2190fa7bf856bb0ed5e8806266e3a2135c6f8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b2c2190fa7bf856bb0ed5e8806266e3a2135c6f8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+b2c2190fa7bf856bb0ed5e8806266e3a2135c6f8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ae8aaf51fcac7b2c0d3062dba0f7203d11485c56b8c51f915ab36dc5bb764bcc
[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" "ae8aaf51fcac7b2c0d3062dba0f7203d11485c56b8c51f915ab36dc5bb764bcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ae8aaf51fcac7b2c0d3062dba0f7203d11485c56b8c51f915ab36dc5bb764bcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae8aaf51fcac7b2c0d3062dba0f7203d11485c56b8c51f915ab36dc5bb764bcc", kill_on_drop: false }`
[INFO] [stdout] ae8aaf51fcac7b2c0d3062dba0f7203d11485c56b8c51f915ab36dc5bb764bcc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+b2c2190fa7bf856bb0ed5e8806266e3a2135c6f8" "check" "--frozen" "--all" "--all-targets" "--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] ef041e70e83ae6cda5c08fa85fab66045038bc2b86b3c115e56395ed41c21469
[INFO] running `Command { std: "docker" "start" "-a" "ef041e70e83ae6cda5c08fa85fab66045038bc2b86b3c115e56395ed41c21469", kill_on_drop: false }`
[INFO] [stderr]     Checking ndless v0.8.6 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0599]: no method named `get_mut` found for union `MaybeUninit<[u8; 8192]>` in the current scope
[INFO] [stdout]   --> src/file_io/io/util.rs:54:39
[INFO] [stdout]    |
[INFO] [stdout] 54 |         reader.initializer().initialize(buf.get_mut());
[INFO] [stdout]    |                                             ^^^^^^^ method not found in `MaybeUninit<[u8; 8192]>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `get_mut` found for union `MaybeUninit<[u8; 8192]>` in the current scope
[INFO] [stdout]   --> src/file_io/io/util.rs:59:44
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let len = match reader.read(unsafe { buf.get_mut() }) {
[INFO] [stdout]    |                                                  ^^^^^^^ method not found in `MaybeUninit<[u8; 8192]>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `get_ref` found for union `MaybeUninit<[u8; 8192]>` in the current scope
[INFO] [stdout]   --> src/file_io/io/util.rs:65:34
[INFO] [stdout]    |
[INFO] [stdout] 65 |         writer.write_all(unsafe { &buf.get_ref()[..len] })?;
[INFO] [stdout]    |                                        ^^^^^^^ method not found in `MaybeUninit<[u8; 8192]>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ndless`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error[E0599]: no method named `get_mut` found for union `MaybeUninit<[u8; 8192]>` in the current scope
[INFO] [stdout]   --> src/file_io/io/util.rs:54:39
[INFO] [stdout]    |
[INFO] [stdout] 54 |         reader.initializer().initialize(buf.get_mut());
[INFO] [stdout]    |                                             ^^^^^^^ method not found in `MaybeUninit<[u8; 8192]>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `get_mut` found for union `MaybeUninit<[u8; 8192]>` in the current scope
[INFO] [stdout]   --> src/file_io/io/util.rs:59:44
[INFO] [stdout]    |
[INFO] [stdout] 59 |         let len = match reader.read(unsafe { buf.get_mut() }) {
[INFO] [stdout]    |                                                  ^^^^^^^ method not found in `MaybeUninit<[u8; 8192]>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0599]: no method named `get_ref` found for union `MaybeUninit<[u8; 8192]>` in the current scope
[INFO] [stdout]   --> src/file_io/io/util.rs:65:34
[INFO] [stdout]    |
[INFO] [stdout] 65 |         writer.write_all(unsafe { &buf.get_ref()[..len] })?;
[INFO] [stdout]    |                                        ^^^^^^^ method not found in `MaybeUninit<[u8; 8192]>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "ef041e70e83ae6cda5c08fa85fab66045038bc2b86b3c115e56395ed41c21469", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef041e70e83ae6cda5c08fa85fab66045038bc2b86b3c115e56395ed41c21469", kill_on_drop: false }`
[INFO] [stdout] ef041e70e83ae6cda5c08fa85fab66045038bc2b86b3c115e56395ed41c21469