[INFO] fetching crate rc-u8-reader 2.0.14...
[INFO] checking rc-u8-reader-2.0.14 against master#936f2600b6c903b04387f74ed5cbce88bb06d243 for pr-91141
[INFO] extracting crate rc-u8-reader 2.0.14 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate rc-u8-reader 2.0.14 on toolchain 936f2600b6c903b04387f74ed5cbce88bb06d243
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rc-u8-reader 2.0.14
[INFO] finished tweaking crates.io crate rc-u8-reader 2.0.14
[INFO] tweaked toml for crates.io crate rc-u8-reader 2.0.14 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ef6ada2f351bb9132152df0bf44675249dc876e958966757d84c969cf5351858
[INFO] running `Command { std: "docker" "start" "-a" "ef6ada2f351bb9132152df0bf44675249dc876e958966757d84c969cf5351858", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ef6ada2f351bb9132152df0bf44675249dc876e958966757d84c969cf5351858", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ef6ada2f351bb9132152df0bf44675249dc876e958966757d84c969cf5351858", kill_on_drop: false }`
[INFO] [stdout] ef6ada2f351bb9132152df0bf44675249dc876e958966757d84c969cf5351858
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+936f2600b6c903b04387f74ed5cbce88bb06d243" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1459e04052899dd4fc40c35781066a5da37eb4758629c42a5674137a0237f5d6
[INFO] running `Command { std: "docker" "start" "-a" "1459e04052899dd4fc40c35781066a5da37eb4758629c42a5674137a0237f5d6", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking debug-helper v0.3.12
[INFO] [stderr]     Checking rc-u8-reader v2.0.14 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.45s
[INFO] running `Command { std: "docker" "inspect" "1459e04052899dd4fc40c35781066a5da37eb4758629c42a5674137a0237f5d6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1459e04052899dd4fc40c35781066a5da37eb4758629c42a5674137a0237f5d6", kill_on_drop: false }`
[INFO] [stdout] 1459e04052899dd4fc40c35781066a5da37eb4758629c42a5674137a0237f5d6