[INFO] fetching crate signature-flow 1.0.0...
[INFO] checking signature-flow-1.0.0 against master#ab869e094a907cc5d19b4080f22eccaf347f1f95 for pr-129604
[INFO] extracting crate signature-flow 1.0.0 into /workspace/builds/worker-3-tc1/source
[INFO] validating manifest of crates.io crate signature-flow 1.0.0 on toolchain ab869e094a907cc5d19b4080f22eccaf347f1f95
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate signature-flow 1.0.0
[INFO] finished tweaking crates.io crate signature-flow 1.0.0
[INFO] tweaked toml for crates.io crate signature-flow 1.0.0 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 21 packages to latest compatible versions
[INFO] [stderr]       Adding block-buffer v0.9.0 (latest: v0.10.4)
[INFO] [stderr]       Adding block-padding v0.2.1 (latest: v0.3.3)
[INFO] [stderr]       Adding digest v0.9.0 (latest: v0.10.7)
[INFO] [stderr]       Adding generic-array v0.14.7 (latest: v1.1.0)
[INFO] [stderr]       Adding hex-literal v0.3.4 (latest: v0.4.1)
[INFO] [stderr]       Adding sha3 v0.9.1 (latest: v0.10.8)
[INFO] [stderr]       Adding signature_derive v1.0.0-pre.3 (latest: v2.1.0)
[INFO] [stderr]       Adding syn v1.0.109 (latest: v2.0.77)
[INFO] [stderr]       Adding synstructure v0.12.6 (latest: v0.13.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "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]  Downloading crates ...
[INFO] [stderr]   Downloaded signature_derive v1.0.0-pre.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5c07f39d759644a4cb15dfaa64fd71d1fc5917d1daf405e5d40c6cf6c7b3e6e2
[INFO] running `Command { std: "docker" "start" "-a" "5c07f39d759644a4cb15dfaa64fd71d1fc5917d1daf405e5d40c6cf6c7b3e6e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5c07f39d759644a4cb15dfaa64fd71d1fc5917d1daf405e5d40c6cf6c7b3e6e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5c07f39d759644a4cb15dfaa64fd71d1fc5917d1daf405e5d40c6cf6c7b3e6e2", kill_on_drop: false }`
[INFO] [stdout] 5c07f39d759644a4cb15dfaa64fd71d1fc5917d1daf405e5d40c6cf6c7b3e6e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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=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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+ab869e094a907cc5d19b4080f22eccaf347f1f95" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] acfa0815a0fb144171ecd9981567d3106d5dd97a36f6b3828253d0b2cde1cbe9
[INFO] running `Command { std: "docker" "start" "-a" "acfa0815a0fb144171ecd9981567d3106d5dd97a36f6b3828253d0b2cde1cbe9", kill_on_drop: false }`
[INFO] [stderr]     Checking block-padding v0.2.1
[INFO] [stderr]     Checking digest v0.9.0
[INFO] [stderr]     Checking keccak v0.1.5
[INFO] [stderr]    Compiling hex-literal v0.3.4
[INFO] [stderr]     Checking signature-flow v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking block-buffer v0.9.0
[INFO] [stderr]     Checking sha3 v0.9.1
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.38s
[INFO] running `Command { std: "docker" "inspect" "acfa0815a0fb144171ecd9981567d3106d5dd97a36f6b3828253d0b2cde1cbe9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "acfa0815a0fb144171ecd9981567d3106d5dd97a36f6b3828253d0b2cde1cbe9", kill_on_drop: false }`
[INFO] [stdout] acfa0815a0fb144171ecd9981567d3106d5dd97a36f6b3828253d0b2cde1cbe9