[INFO] fetching crate block-breaker 0.2.1...
[INFO] checking block-breaker-0.2.1 against try#79452e8441468c5568c20bfca2aa1fe75b645b2d for pr-152210
[INFO] extracting crate block-breaker 0.2.1 into /workspace/builds/worker-4-tc2/source
[INFO] started tweaking crates.io crate block-breaker 0.2.1
[INFO] finished tweaking crates.io crate block-breaker 0.2.1
[INFO] tweaked toml for crates.io crate block-breaker 0.2.1 written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate block-breaker 0.2.1 on toolchain 79452e8441468c5568c20bfca2aa1fe75b645b2d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+79452e8441468c5568c20bfca2aa1fe75b645b2d" "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" "+79452e8441468c5568c20bfca2aa1fe75b645b2d" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 20 packages to latest compatible versions
[INFO] [stderr]       Adding rand v0.6.5 (available: v0.10.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+79452e8441468c5568c20bfca2aa1fe75b645b2d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+79452e8441468c5568c20bfca2aa1fe75b645b2d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d3b8197cc7baa9e96578718e3250742014d2d3b65e096c9915a9927c3c09e9e3
[INFO] running `Command { std: "docker" "start" "-a" "d3b8197cc7baa9e96578718e3250742014d2d3b65e096c9915a9927c3c09e9e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d3b8197cc7baa9e96578718e3250742014d2d3b65e096c9915a9927c3c09e9e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3b8197cc7baa9e96578718e3250742014d2d3b65e096c9915a9927c3c09e9e3", kill_on_drop: false }`
[INFO] [stdout] d3b8197cc7baa9e96578718e3250742014d2d3b65e096c9915a9927c3c09e9e3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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@sha256:61361fe0aef631f17e9d025a70c5a647956f8c671dd02950a60ad3f5cc5526d7" "/opt/rustwide/cargo-home/bin/cargo" "+79452e8441468c5568c20bfca2aa1fe75b645b2d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7db1217bd37a10f4e76fa49386812dff91f8a0762aa38a784fcbfd4a5ff9cc55
[INFO] running `Command { std: "docker" "start" "-a" "7db1217bd37a10f4e76fa49386812dff91f8a0762aa38a784fcbfd4a5ff9cc55", kill_on_drop: false }`
[INFO] [stderr] error: failed to download `autocfg v0.1.8`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   unable to get packages from source
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   config.json not found in registry
[INFO] running `Command { std: "docker" "inspect" "7db1217bd37a10f4e76fa49386812dff91f8a0762aa38a784fcbfd4a5ff9cc55", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7db1217bd37a10f4e76fa49386812dff91f8a0762aa38a784fcbfd4a5ff9cc55", kill_on_drop: false }`
[INFO] [stdout] 7db1217bd37a10f4e76fa49386812dff91f8a0762aa38a784fcbfd4a5ff9cc55