[INFO] fetching crate cargo-doc-ngrok 0.2.2...
[INFO] checking cargo-doc-ngrok-0.2.2 against try#50f413885985a8b0a0b6ca0766a0aedd45304953 for pr-155657-1
[INFO] extracting crate cargo-doc-ngrok 0.2.2 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate cargo-doc-ngrok 0.2.2
[INFO] finished tweaking crates.io crate cargo-doc-ngrok 0.2.2
[INFO] tweaked toml for crates.io crate cargo-doc-ngrok 0.2.2 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate cargo-doc-ngrok 0.2.2 on toolchain 50f413885985a8b0a0b6ca0766a0aedd45304953
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+50f413885985a8b0a0b6ca0766a0aedd45304953" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate cargo-doc-ngrok 0.2.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+50f413885985a8b0a0b6ca0766a0aedd45304953" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+50f413885985a8b0a0b6ca0766a0aedd45304953" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f2700ad6a678a07734e8c6898c3fd4e4231b5e4352e7c277ca84b17810085a8a
[INFO] running `Command { std: "docker" "start" "-a" "f2700ad6a678a07734e8c6898c3fd4e4231b5e4352e7c277ca84b17810085a8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f2700ad6a678a07734e8c6898c3fd4e4231b5e4352e7c277ca84b17810085a8a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f2700ad6a678a07734e8c6898c3fd4e4231b5e4352e7c277ca84b17810085a8a", kill_on_drop: false }`
[INFO] [stdout] f2700ad6a678a07734e8c6898c3fd4e4231b5e4352e7c277ca84b17810085a8a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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" "RUSTDOCFLAGS=--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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+50f413885985a8b0a0b6ca0766a0aedd45304953" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 650fb92607afa6b075a1fa9438fab1d2974ea0f7da2dd6288b1a741ae4d5a5cf
[INFO] running `Command { std: "docker" "start" "-a" "650fb92607afa6b075a1fa9438fab1d2974ea0f7da2dd6288b1a741ae4d5a5cf", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
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[INFO] [stderr]     Checking cargo-platform v0.1.9
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[INFO] [stderr]     Checking ignore-files v1.3.1
[INFO] [stderr]     Checking watchexec v2.3.2
[INFO] [stdout] error[E0277]: the trait bound `(): std::error::Error` is not satisfied
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/watchexec-2.3.2/src/handler.rs:218:54
[INFO] [stdout]     |
[INFO] [stdout] 218 |         Ok::<(), std::convert::Infallible>(()).map_err(|e| Box::new(e) as _)
[INFO] [stdout]     |                                                            ^^^^^^^^^^^ the trait `std::error::Error` is not implemented for `()`
[INFO] [stdout]     |
[INFO] [stdout]     = note: required for the cast from `Box<()>` to `Box<dyn std::error::Error>`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking hyper v1.6.0
[INFO] [stdout] For more information about this error, try `rustc --explain E0277`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `watchexec` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "650fb92607afa6b075a1fa9438fab1d2974ea0f7da2dd6288b1a741ae4d5a5cf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "650fb92607afa6b075a1fa9438fab1d2974ea0f7da2dd6288b1a741ae4d5a5cf", kill_on_drop: false }`
[INFO] [stdout] 650fb92607afa6b075a1fa9438fab1d2974ea0f7da2dd6288b1a741ae4d5a5cf