[INFO] fetching crate frost-core 2.2.0...
[INFO] testing frost-core-2.2.0 against master#cdb45c87e2cd43495379f7e867e3cc15dcee9f93 for pr-145838-1
[INFO] extracting crate frost-core 2.2.0 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate frost-core 2.2.0
[INFO] finished tweaking crates.io crate frost-core 2.2.0
[INFO] tweaked toml for crates.io crate frost-core 2.2.0 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate frost-core 2.2.0 on toolchain cdb45c87e2cd43495379f7e867e3cc15dcee9f93
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate frost-core 2.2.0 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" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded quick-error v1.2.0
[INFO] [stderr]   Downloaded lock_api v0.4.0
[INFO] [stderr]   Downloaded memoffset v0.5.0
[INFO] [stderr]   Downloaded log v0.4.0
[INFO] [stderr]   Downloaded walkdir v2.3.0
[INFO] [stderr]   Downloaded critical-section v1.0.0
[INFO] [stderr]   Downloaded semver v1.0.0
[INFO] [stderr]   Downloaded byteorder v1.4.0
[INFO] [stderr]   Downloaded num_cpus v1.2.0
[INFO] [stderr]   Downloaded same-file v1.0.1
[INFO] [stderr]   Downloaded either v1.0.0
[INFO] [stderr]   Downloaded postcard v1.0.1
[INFO] [stderr]   Downloaded fnv v1.0.0
[INFO] [stderr]   Downloaded anes v0.1.4
[INFO] [stderr]   Downloaded winapi-i686-pc-windows-gnu v0.3.0
[INFO] [stderr]   Downloaded winapi v0.3.0
[INFO] [stderr]   Downloaded winapi-x86_64-pc-windows-gnu v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 51b8d65404ef7643c5993093fc3c1ba927c3d7979c5ae163f86367a5ed6c7f94
[INFO] running `Command { std: "docker" "start" "-a" "51b8d65404ef7643c5993093fc3c1ba927c3d7979c5ae163f86367a5ed6c7f94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51b8d65404ef7643c5993093fc3c1ba927c3d7979c5ae163f86367a5ed6c7f94", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51b8d65404ef7643c5993093fc3c1ba927c3d7979c5ae163f86367a5ed6c7f94", kill_on_drop: false }`
[INFO] [stdout] 51b8d65404ef7643c5993093fc3c1ba927c3d7979c5ae163f86367a5ed6c7f94
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+cdb45c87e2cd43495379f7e867e3cc15dcee9f93" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b197e361061a7dd187558235eb89aaab0b7c5ac4ef68fe4f1da42ca3aaa5da1e
[INFO] running `Command { std: "docker" "start" "-a" "b197e361061a7dd187558235eb89aaab0b7c5ac4ef68fe4f1da42ca3aaa5da1e", kill_on_drop: false }`
[INFO] [stderr] error: failed to download `cobs v0.2.3`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   unable to get packages from source
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to unpack package `cobs v0.2.3`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to create directory `/opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/cobs-0.2.3`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Read-only file system (os error 30)
[INFO] running `Command { std: "docker" "inspect" "b197e361061a7dd187558235eb89aaab0b7c5ac4ef68fe4f1da42ca3aaa5da1e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b197e361061a7dd187558235eb89aaab0b7c5ac4ef68fe4f1da42ca3aaa5da1e", kill_on_drop: false }`
[INFO] [stdout] b197e361061a7dd187558235eb89aaab0b7c5ac4ef68fe4f1da42ca3aaa5da1e