[INFO] fetching crate herald 0.1.0...
[INFO] checking herald-0.1.0 against master#506512391b1a75ae450d36c9420978402a91abcc for pr-125384
[INFO] extracting crate herald 0.1.0 into /workspace/builds/worker-6-tc1/source
[INFO] validating manifest of crates.io crate herald 0.1.0 on toolchain 506512391b1a75ae450d36c9420978402a91abcc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate herald 0.1.0
[INFO] finished tweaking crates.io crate herald 0.1.0
[INFO] tweaked toml for crates.io crate herald 0.1.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 24 packages to latest compatible versions
[INFO] [stderr]       Adding futures-channel-preview v0.3.0-alpha.18 (latest: v0.3.0-alpha.19)
[INFO] [stderr]       Adding futures-core-preview v0.3.0-alpha.18 (latest: v0.3.0-alpha.19)
[INFO] [stderr]       Adding futures-executor-preview v0.3.0-alpha.18 (latest: v0.3.0-alpha.19)
[INFO] [stderr]       Adding futures-io-preview v0.3.0-alpha.18 (latest: v0.3.0-alpha.19)
[INFO] [stderr]       Adding futures-preview v0.3.0-alpha.18 (latest: v0.3.0-alpha.19)
[INFO] [stderr]       Adding futures-sink-preview v0.3.0-alpha.18 (latest: v0.3.0-alpha.19)
[INFO] [stderr]       Adding futures-timer v0.3.0 (latest: v3.0.3)
[INFO] [stderr]       Adding futures-util-preview v0.3.0-alpha.18 (latest: v0.3.0-alpha.19)
[INFO] [stderr]       Adding rxrust v0.8.3 (latest: v0.15.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.66)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded herald_derive v0.1.0
[INFO] [stderr]   Downloaded rxrust v0.8.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ba89388649c38d0d29b623be509e4fdeb4e7514ad7fd2d2da7024b53f2494dee
[INFO] running `Command { std: "docker" "start" "-a" "ba89388649c38d0d29b623be509e4fdeb4e7514ad7fd2d2da7024b53f2494dee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ba89388649c38d0d29b623be509e4fdeb4e7514ad7fd2d2da7024b53f2494dee", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba89388649c38d0d29b623be509e4fdeb4e7514ad7fd2d2da7024b53f2494dee", kill_on_drop: false }`
[INFO] [stdout] ba89388649c38d0d29b623be509e4fdeb4e7514ad7fd2d2da7024b53f2494dee
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/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=allow" "-e" "RUSTDOCFLAGS=--cap-lints=allow" "-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@sha256:59a85a07ab18ca8720692f8e61effa1c651d9e2ca591e072c2b212bb91a6b8b5" "/opt/rustwide/cargo-home/bin/cargo" "+506512391b1a75ae450d36c9420978402a91abcc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9b84a161eba3edbec936bdc26ec44c98ff8ce32fee86fe61aebaf6bb9d2a56b5
[INFO] running `Command { std: "docker" "start" "-a" "9b84a161eba3edbec936bdc26ec44c98ff8ce32fee86fe61aebaf6bb9d2a56b5", kill_on_drop: false }`
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking futures-io-preview v0.3.0-alpha.18
[INFO] [stderr]     Checking num_cpus v1.16.0
[INFO] [stderr]    Compiling herald_derive v0.1.0
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.18
[INFO] [stdout] error[E0599]: no variant or associated item named `__Nonexhaustive` found for enum `syn::Type` in the current scope
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/herald_derive-0.1.0/src/lib.rs:406:13
[INFO] [stdout]     |
[INFO] [stdout] 406 |       Type::__Nonexhaustive => unreachable!(),
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^ variant or associated item not found in `syn::Type`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.18
[INFO] [stdout] error: aborting due to 1 previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `herald_derive` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "9b84a161eba3edbec936bdc26ec44c98ff8ce32fee86fe61aebaf6bb9d2a56b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b84a161eba3edbec936bdc26ec44c98ff8ce32fee86fe61aebaf6bb9d2a56b5", kill_on_drop: false }`
[INFO] [stdout] 9b84a161eba3edbec936bdc26ec44c98ff8ce32fee86fe61aebaf6bb9d2a56b5