[INFO] crate nitrogen 0.1.0 is already in cache
[INFO] checking nitrogen-0.1.0 against try#a243773eaf3fedcd203f10ae4579e4f106bf7ccd for pr-68325
[INFO] extracting crate nitrogen 0.1.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate nitrogen 0.1.0 on toolchain a243773eaf3fedcd203f10ae4579e4f106bf7ccd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+a243773eaf3fedcd203f10ae4579e4f106bf7ccd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate nitrogen 0.1.0
[INFO] finished tweaking crates.io crate nitrogen 0.1.0
[INFO] tweaked toml for crates.io crate nitrogen 0.1.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+a243773eaf3fedcd203f10ae4579e4f106bf7ccd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+a243773eaf3fedcd203f10ae4579e4f106bf7ccd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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=forbid" "-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" "+a243773eaf3fedcd203f10ae4579e4f106bf7ccd" "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] 6ae2c703c51f6927ca8e8cecb7e2186da6bbcededa3cbe5121b3540de8cd91fe
[INFO] running `"docker" "start" "-a" "6ae2c703c51f6927ca8e8cecb7e2186da6bbcededa3cbe5121b3540de8cd91fe"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking inotify v0.8.2
[INFO] [stderr]     Checking parking_lot v0.4.8
[INFO] [stderr]     Checking structopt v0.2.18
[INFO] [stderr]     Checking chashmap v2.2.2
[INFO] [stderr]     Checking notify v5.0.0-pre.2
[INFO] [stderr]     Checking nitrogen v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:11:64
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub fn really_complicated_code(a: u8, b: u8) -> Result<u8, Box<Error>> {
[INFO] [stderr]    |                                                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:11:64
[INFO] [stderr]    |
[INFO] [stderr] 11 | pub fn really_complicated_code(a: u8, b: u8) -> Result<u8, Box<Error>> {
[INFO] [stderr]    |                                                                ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `new` found for trait object `dyn file_watcher::notify::Watcher` in the current scope
[INFO] [stderr]   --> src/bin/nitrogen/file_watcher.rs:11:52
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let mut watcher: RecommendedWatcher = Watcher::new(tx, Duration::from_secs(4))?;
[INFO] [stderr]    |                                                    ^^^ function or associated item not found in `dyn file_watcher::notify::Watcher`
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/bin/nitrogen/file_watcher.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 15 | /     loop {
[INFO] [stderr] 16 | |         match rx.recv() {
[INFO] [stderr] 17 | |             Ok(event) => println!("changed: {:?}", event),
[INFO] [stderr] 18 | |             Err(err) => println!("watch error: {:?}", err),
[INFO] [stderr] 19 | |         };
[INFO] [stderr] 20 | |     }
[INFO] [stderr]    | |_____- any code following this expression is unreachable
[INFO] [stderr] 21 | 
[INFO] [stderr] 22 |       Ok(())
[INFO] [stderr]    |       ^^^^^^ unreachable expression
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: could not compile `nitrogen`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error[E0599]: no function or associated item named `new` found for trait object `dyn file_watcher::notify::Watcher` in the current scope
[INFO] [stderr]   --> src/bin/nitrogen/file_watcher.rs:11:52
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let mut watcher: RecommendedWatcher = Watcher::new(tx, Duration::from_secs(4))?;
[INFO] [stderr]    |                                                    ^^^ function or associated item not found in `dyn file_watcher::notify::Watcher`
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable expression
[INFO] [stderr]   --> src/bin/nitrogen/file_watcher.rs:22:5
[INFO] [stderr]    |
[INFO] [stderr] 15 | /     loop {
[INFO] [stderr] 16 | |         match rx.recv() {
[INFO] [stderr] 17 | |             Ok(event) => println!("changed: {:?}", event),
[INFO] [stderr] 18 | |             Err(err) => println!("watch error: {:?}", err),
[INFO] [stderr] 19 | |         };
[INFO] [stderr] 20 | |     }
[INFO] [stderr]    | |_____- any code following this expression is unreachable
[INFO] [stderr] 21 | 
[INFO] [stderr] 22 |       Ok(())
[INFO] [stderr]    |       ^^^^^^ unreachable expression
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: could not compile `nitrogen`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "6ae2c703c51f6927ca8e8cecb7e2186da6bbcededa3cbe5121b3540de8cd91fe"`
[INFO] running `"docker" "rm" "-f" "6ae2c703c51f6927ca8e8cecb7e2186da6bbcededa3cbe5121b3540de8cd91fe"`
[INFO] [stdout] 6ae2c703c51f6927ca8e8cecb7e2186da6bbcededa3cbe5121b3540de8cd91fe