[INFO] fetching crate confusion 0.0.1...
[INFO] checking confusion-0.0.1 against try#72f88fc4e9458f89516a0b8b0868f3718aec5b47 for pr-74989
[INFO] extracting crate confusion 0.0.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate confusion 0.0.1 on toolchain 72f88fc4e9458f89516a0b8b0868f3718aec5b47
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate confusion 0.0.1
[INFO] finished tweaking crates.io crate confusion 0.0.1
[INFO] tweaked toml for crates.io crate confusion 0.0.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: dependency (nickel) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[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" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "metadata" "--no-deps" "--format-version=1", 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] e8f5e09804108b099cbf9775851af14c96b0d1055d1bad474bc9308ab9e25fac
[INFO] running `Command { std: "docker" "start" "-a" "e8f5e09804108b099cbf9775851af14c96b0d1055d1bad474bc9308ab9e25fac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e8f5e09804108b099cbf9775851af14c96b0d1055d1bad474bc9308ab9e25fac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e8f5e09804108b099cbf9775851af14c96b0d1055d1bad474bc9308ab9e25fac", kill_on_drop: false }`
[INFO] [stdout] e8f5e09804108b099cbf9775851af14c96b0d1055d1bad474bc9308ab9e25fac
[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" "+72f88fc4e9458f89516a0b8b0868f3718aec5b47" "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] 96921e6629732b629f94e49d2bd8e35cddfc08e6eb9e1dd84e18a90063a3b709
[INFO] running `Command { std: "docker" "start" "-a" "96921e6629732b629f94e49d2bd8e35cddfc08e6eb9e1dd84e18a90063a3b709", kill_on_drop: false }`
[INFO] [stderr] warning: dependency (nickel) specified without providing a local path, Git repository, or version to use. This will be considered an error in future versions
[INFO] [stderr]     Checking modifier v0.1.0
[INFO] [stderr]     Checking groupable v0.2.0
[INFO] [stderr]     Checking base64 v0.9.3
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking log v0.4.11
[INFO] [stderr]     Checking plugin v0.2.6
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking mime v0.2.6
[INFO] [stderr]     Checking mustache v0.9.0
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking hyper v0.10.16
[INFO] [stderr]     Checking nickel v0.11.0
[INFO] [stderr]     Checking confusion v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/main.rs:9:19
[INFO] [stdout]    |
[INFO] [stdout] 9  |     server.get("/", middleware! { |_request, response|
[INFO] [stdout]    |  ___________________^
[INFO] [stdout] 10 | |     return response.send_file(&Path::new("frontend/setup.html"))
[INFO] [stdout]    | |     ------------------------------------------------------------ any code following this expression is unreachable
[INFO] [stdout] 11 | |   });
[INFO] [stdout]    | |___^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unreachable expression
[INFO] [stdout]   --> src/main.rs:9:19
[INFO] [stdout]    |
[INFO] [stdout] 9  |     server.get("/", middleware! { |_request, response|
[INFO] [stdout]    |  ___________________^
[INFO] [stdout] 10 | |     return response.send_file(&Path::new("frontend/setup.html"))
[INFO] [stdout]    | |     ------------------------------------------------------------ any code following this expression is unreachable
[INFO] [stdout] 11 | |   });
[INFO] [stdout]    | |___^ unreachable expression
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unreachable_code)]` on by default
[INFO] [stdout]    = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:13:3
[INFO] [stdout]    |
[INFO] [stdout] 6  | fn main() {
[INFO] [stdout]    |           - expected `()` because of default return type
[INFO] [stdout] ...
[INFO] [stdout] 13 |   server.listen("127.0.0.1:3000")
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^- help: try adding a semicolon: `;`
[INFO] [stdout]    |   |
[INFO] [stdout]    |   expected `()`, found enum `std::result::Result`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected unit type `()`
[INFO] [stdout]                    found enum `std::result::Result<ListeningServer, std::boxed::Box<(dyn std::error::Error + 'static)>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `confusion`.
[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[E0308]: mismatched types
[INFO] [stdout]   --> src/main.rs:13:3
[INFO] [stdout]    |
[INFO] [stdout] 6  | fn main() {
[INFO] [stdout]    |           - expected `()` because of default return type
[INFO] [stdout] ...
[INFO] [stdout] 13 |   server.listen("127.0.0.1:3000")
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^- help: try adding a semicolon: `;`
[INFO] [stdout]    |   |
[INFO] [stdout]    |   expected `()`, found enum `std::result::Result`
[INFO] [stdout]    |
[INFO] [stdout]    = note: expected unit type `()`
[INFO] [stdout]                    found enum `std::result::Result<ListeningServer, std::boxed::Box<(dyn std::error::Error + 'static)>>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "96921e6629732b629f94e49d2bd8e35cddfc08e6eb9e1dd84e18a90063a3b709", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "96921e6629732b629f94e49d2bd8e35cddfc08e6eb9e1dd84e18a90063a3b709", kill_on_drop: false }`
[INFO] [stdout] 96921e6629732b629f94e49d2bd8e35cddfc08e6eb9e1dd84e18a90063a3b709
