[INFO] fetching crate signature 3.0.0-rc.1...
[INFO] building signature-3.0.0-rc.1 against master#44f415c1d617ebc7b931a243b7b321ef8a6ca47c for pr-142134-abi-ast-error
[INFO] extracting crate signature 3.0.0-rc.1 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate signature 3.0.0-rc.1 on toolchain 44f415c1d617ebc7b931a243b7b321ef8a6ca47c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate signature 3.0.0-rc.1
[INFO] finished tweaking crates.io crate signature 3.0.0-rc.1
[INFO] tweaked toml for crates.io crate signature 3.0.0-rc.1 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate signature 3.0.0-rc.1 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" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 6d5cce26bd6fa83b99e181fc08032fd44122260063410eda3da9b94d28d88634
[INFO] running `Command { std: "docker" "start" "-a" "6d5cce26bd6fa83b99e181fc08032fd44122260063410eda3da9b94d28d88634", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6d5cce26bd6fa83b99e181fc08032fd44122260063410eda3da9b94d28d88634", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d5cce26bd6fa83b99e181fc08032fd44122260063410eda3da9b94d28d88634", kill_on_drop: false }`
[INFO] [stdout] 6d5cce26bd6fa83b99e181fc08032fd44122260063410eda3da9b94d28d88634
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 65f886d636b773f2d902e93be8f4a2e3bb40dfda94237a3c2d6e542584820fcc
[INFO] running `Command { std: "docker" "start" "-a" "65f886d636b773f2d902e93be8f4a2e3bb40dfda94237a3c2d6e542584820fcc", kill_on_drop: false }`
[INFO] [stderr]    Compiling signature v3.0.0-rc.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.07s
[INFO] running `Command { std: "docker" "inspect" "65f886d636b773f2d902e93be8f4a2e3bb40dfda94237a3c2d6e542584820fcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65f886d636b773f2d902e93be8f4a2e3bb40dfda94237a3c2d6e542584820fcc", kill_on_drop: false }`
[INFO] [stdout] 65f886d636b773f2d902e93be8f4a2e3bb40dfda94237a3c2d6e542584820fcc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+44f415c1d617ebc7b931a243b7b321ef8a6ca47c" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ebd030118b8d7dd69c7d6fa6fe7698c9fb2fec05ae5535d4991cd87e8251c555
[INFO] running `Command { std: "docker" "start" "-a" "ebd030118b8d7dd69c7d6fa6fe7698c9fb2fec05ae5535d4991cd87e8251c555", kill_on_drop: false }`
[INFO] [stderr]    Compiling signature v3.0.0-rc.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] running `Command { std: "docker" "inspect" "ebd030118b8d7dd69c7d6fa6fe7698c9fb2fec05ae5535d4991cd87e8251c555", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ebd030118b8d7dd69c7d6fa6fe7698c9fb2fec05ae5535d4991cd87e8251c555", kill_on_drop: false }`
[INFO] [stdout] ebd030118b8d7dd69c7d6fa6fe7698c9fb2fec05ae5535d4991cd87e8251c555