[INFO] crate guard 0.5.0 is already in cache
[INFO] checking guard-0.5.0 against nightly-2019-10-27 for pr-65897
[INFO] extracting crate guard 0.5.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate guard 0.5.0 on toolchain nightly-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate guard 0.5.0
[INFO] finished tweaking crates.io crate guard 0.5.0
[INFO] tweaked toml for crates.io crate guard 0.5.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=allow" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+nightly-2019-10-27" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 98cfdb2741ee0ba8fb8e44ba5b9b89b08375a12e485f2e94faf3d6b8eb8bbd2a
[INFO] running `"docker" "start" "-a" "98cfdb2741ee0ba8fb8e44ba5b9b89b08375a12e485f2e94faf3d6b8eb8bbd2a"`
[INFO] [stderr]     Checking guard v0.5.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0658]: box expression syntax is experimental; you can call `Box::new` instead
[INFO] [stderr]    --> src/lib.rs:424:20
[INFO] [stderr]     |
[INFO] [stderr] 424 |         let foo = (box 42, [1, 2, 3]);
[INFO] [stderr]     |                    ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/49733
[INFO] [stderr]     = help: add `#![feature(box_syntax)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: box expression syntax is experimental; you can call `Box::new` instead
[INFO] [stderr]    --> src/lib.rs:428:29
[INFO] [stderr]     |
[INFO] [stderr] 428 |         let mut foo = Some((box 42, [1, 2, 3]));
[INFO] [stderr]     |                             ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/49733
[INFO] [stderr]     = help: add `#![feature(box_syntax)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: box expression syntax is experimental; you can call `Box::new` instead
[INFO] [stderr]    --> src/lib.rs:444:20
[INFO] [stderr]     |
[INFO] [stderr] 444 |         let foo = (box 42, [1, 2, 3]);
[INFO] [stderr]     |                    ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/49733
[INFO] [stderr]     = help: add `#![feature(box_syntax)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: box expression syntax is experimental; you can call `Box::new` instead
[INFO] [stderr]    --> src/lib.rs:449:20
[INFO] [stderr]     |
[INFO] [stderr] 449 |         let foo = (box 42, [1, 2, 3]);
[INFO] [stderr]     |                    ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/49733
[INFO] [stderr]     = help: add `#![feature(box_syntax)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error: could not compile `guard`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0658]: box expression syntax is experimental; you can call `Box::new` instead
[INFO] [stderr]    --> src/lib.rs:424:20
[INFO] [stderr]     |
[INFO] [stderr] 424 |         let foo = (box 42, [1, 2, 3]);
[INFO] [stderr]     |                    ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/49733
[INFO] [stderr]     = help: add `#![feature(box_syntax)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: box expression syntax is experimental; you can call `Box::new` instead
[INFO] [stderr]    --> src/lib.rs:428:29
[INFO] [stderr]     |
[INFO] [stderr] 428 |         let mut foo = Some((box 42, [1, 2, 3]));
[INFO] [stderr]     |                             ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/49733
[INFO] [stderr]     = help: add `#![feature(box_syntax)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: box expression syntax is experimental; you can call `Box::new` instead
[INFO] [stderr]    --> src/lib.rs:444:20
[INFO] [stderr]     |
[INFO] [stderr] 444 |         let foo = (box 42, [1, 2, 3]);
[INFO] [stderr]     |                    ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/49733
[INFO] [stderr]     = help: add `#![feature(box_syntax)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error[E0658]: box expression syntax is experimental; you can call `Box::new` instead
[INFO] [stderr]    --> src/lib.rs:449:20
[INFO] [stderr]     |
[INFO] [stderr] 449 |         let foo = (box 42, [1, 2, 3]);
[INFO] [stderr]     |                    ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: for more information, see https://github.com/rust-lang/rust/issues/49733
[INFO] [stderr]     = help: add `#![feature(box_syntax)]` to the crate attributes to enable
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 4 previous errors
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0658`.
[INFO] [stderr] error: could not compile `guard`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "98cfdb2741ee0ba8fb8e44ba5b9b89b08375a12e485f2e94faf3d6b8eb8bbd2a"`
[INFO] running `"docker" "rm" "-f" "98cfdb2741ee0ba8fb8e44ba5b9b89b08375a12e485f2e94faf3d6b8eb8bbd2a"`
[INFO] [stdout] 98cfdb2741ee0ba8fb8e44ba5b9b89b08375a12e485f2e94faf3d6b8eb8bbd2a