[INFO] fetching crate varlink_derive 8.0.0...
[INFO] checking varlink_derive-8.0.0 against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] extracting crate varlink_derive 8.0.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate varlink_derive 8.0.0 on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate varlink_derive 8.0.0
[INFO] finished tweaking crates.io crate varlink_derive 8.0.0
[INFO] tweaked toml for crates.io crate varlink_derive 8.0.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4edb1ea00f65ab9bd39814fbf5408b430bf0dc120f9fd07035fd1bf2ce23dac4
[INFO] running `Command { std: "docker" "start" "-a" "4edb1ea00f65ab9bd39814fbf5408b430bf0dc120f9fd07035fd1bf2ce23dac4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4edb1ea00f65ab9bd39814fbf5408b430bf0dc120f9fd07035fd1bf2ce23dac4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4edb1ea00f65ab9bd39814fbf5408b430bf0dc120f9fd07035fd1bf2ce23dac4", kill_on_drop: false }`
[INFO] [stdout] 4edb1ea00f65ab9bd39814fbf5408b430bf0dc120f9fd07035fd1bf2ce23dac4
[INFO] running `Command { std: "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" "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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 0491338a8b4c68847df74e156e186dc1e9dec253e9f40f43d1d07f00eadec43f
[INFO] running `Command { std: "docker" "start" "-a" "0491338a8b4c68847df74e156e186dc1e9dec253e9f40f43d1d07f00eadec43f", kill_on_drop: false }`
[INFO] [stderr]    Compiling peg-runtime v0.6.3
[INFO] [stderr]    Compiling varlink_parser v4.1.0
[INFO] [stderr]     Checking chainerror v0.7.0
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking chainerror v0.4.3
[INFO] [stderr]     Checking proc-macro2 v0.4.30
[INFO] [stdout] error[E0119]: conflicting implementations of trait `std::error::Error` for type `&ChainError<_>`
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/chainerror-0.4.3/src/lib.rs:493:1
[INFO] [stdout]     |
[INFO] [stdout] 493 | impl<T: 'static + Display + Debug> Error for &ChainError<T> {
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: conflicting implementation in crate `std`:
[INFO] [stdout]             - impl<'a, T> std::error::Error for &'a T
[INFO] [stdout]               where T: std::error::Error, T: ?Sized;
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0119`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `chainerror`
[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] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "0491338a8b4c68847df74e156e186dc1e9dec253e9f40f43d1d07f00eadec43f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0491338a8b4c68847df74e156e186dc1e9dec253e9f40f43d1d07f00eadec43f", kill_on_drop: false }`
[INFO] [stdout] 0491338a8b4c68847df74e156e186dc1e9dec253e9f40f43d1d07f00eadec43f