[INFO] fetching crate libghost 0.4.6...
[INFO] testing libghost-0.4.6 against master#160e7623e8cbbf1feab2b6e2a24733a98c7bde9c for pr-145628
[INFO] extracting crate libghost 0.4.6 into /workspace/builds/worker-5-tc1/source
[INFO] started tweaking crates.io crate libghost 0.4.6
[INFO] finished tweaking crates.io crate libghost 0.4.6
[INFO] tweaked toml for crates.io crate libghost 0.4.6 written to /workspace/builds/worker-5-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate libghost 0.4.6 on toolchain 160e7623e8cbbf1feab2b6e2a24733a98c7bde9c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+160e7623e8cbbf1feab2b6e2a24733a98c7bde9c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+160e7623e8cbbf1feab2b6e2a24733a98c7bde9c" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 43 packages to latest compatible versions
[INFO] [stderr]       Adding pros v0.8.0 (available: v0.9.0)
[INFO] [stderr]       Adding pros-core v0.1.0 (available: v0.1.1)
[INFO] [stderr]       Adding pros-panic v0.1.0 (available: v0.1.1)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+160e7623e8cbbf1feab2b6e2a24733a98c7bde9c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded pros v0.8.0
[INFO] [stderr]   Downloaded snafu-derive v0.8.8
[INFO] [stderr]   Downloaded pros-panic v0.1.0
[INFO] [stderr]   Downloaded pros-core v0.1.0
[INFO] [stderr]   Downloaded pros-devices v0.1.0
[INFO] [stderr]   Downloaded pros-math v0.1.0
[INFO] [stderr]   Downloaded no_std_io v0.6.0
[INFO] [stderr]   Downloaded snafu v0.8.8
[INFO] [stderr]   Downloaded dlmalloc v0.2.11
[INFO] [stderr]   Downloaded pros-sys v0.7.0
[INFO] [stderr]   Downloaded pros-async v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+160e7623e8cbbf1feab2b6e2a24733a98c7bde9c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 52a51e0ec0df60608a17a18d02a0da9e3d30fc0125610d2a9ece3977ca68d664
[INFO] running `Command { std: "docker" "start" "-a" "52a51e0ec0df60608a17a18d02a0da9e3d30fc0125610d2a9ece3977ca68d664", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "52a51e0ec0df60608a17a18d02a0da9e3d30fc0125610d2a9ece3977ca68d664", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "52a51e0ec0df60608a17a18d02a0da9e3d30fc0125610d2a9ece3977ca68d664", kill_on_drop: false }`
[INFO] [stdout] 52a51e0ec0df60608a17a18d02a0da9e3d30fc0125610d2a9ece3977ca68d664
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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" "+160e7623e8cbbf1feab2b6e2a24733a98c7bde9c" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d71f8eaf7ca00f2ea75428c0832fdb415dabe8fbf7b7adab26788a82203c1176
[INFO] running `Command { std: "docker" "start" "-a" "d71f8eaf7ca00f2ea75428c0832fdb415dabe8fbf7b7adab26788a82203c1176", kill_on_drop: false }`
[INFO] [stderr] error: failed to download `num-traits v0.2.19`
[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 `num-traits v0.2.19`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   failed to create directory `/opt/rustwide/cargo-home/registry/src/index.crates.io-1949cf8c6b5b557f/num-traits-0.2.19`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   Read-only file system (os error 30)
[INFO] running `Command { std: "docker" "inspect" "d71f8eaf7ca00f2ea75428c0832fdb415dabe8fbf7b7adab26788a82203c1176", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d71f8eaf7ca00f2ea75428c0832fdb415dabe8fbf7b7adab26788a82203c1176", kill_on_drop: false }`
[INFO] [stdout] d71f8eaf7ca00f2ea75428c0832fdb415dabe8fbf7b7adab26788a82203c1176