[INFO] fetching crate kaptn-syn 0.3.0...
[INFO] checking kaptn-syn-0.3.0 against master#568b11762723b001bfa693d0f21c5dad01d4e813 for pr-149518
[INFO] extracting crate kaptn-syn 0.3.0 into /workspace/builds/worker-4-tc1/source
[INFO] started tweaking crates.io crate kaptn-syn 0.3.0
[INFO] finished tweaking crates.io crate kaptn-syn 0.3.0
[INFO] tweaked toml for crates.io crate kaptn-syn 0.3.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate kaptn-syn 0.3.0 on toolchain 568b11762723b001bfa693d0f21c5dad01d4e813
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+568b11762723b001bfa693d0f21c5dad01d4e813" "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" "+568b11762723b001bfa693d0f21c5dad01d4e813" "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]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 4 packages to latest compatible versions
[INFO] [stderr]       Adding syn v1.0.109 (available: v2.0.111)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+568b11762723b001bfa693d0f21c5dad01d4e813" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+568b11762723b001bfa693d0f21c5dad01d4e813" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c3d5d8d1ef96e92080b05ccdfdc591dc2be1063aa2f3129ca1642a83f63d8a53
[INFO] running `Command { std: "docker" "start" "-a" "c3d5d8d1ef96e92080b05ccdfdc591dc2be1063aa2f3129ca1642a83f63d8a53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c3d5d8d1ef96e92080b05ccdfdc591dc2be1063aa2f3129ca1642a83f63d8a53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c3d5d8d1ef96e92080b05ccdfdc591dc2be1063aa2f3129ca1642a83f63d8a53", kill_on_drop: false }`
[INFO] [stdout] c3d5d8d1ef96e92080b05ccdfdc591dc2be1063aa2f3129ca1642a83f63d8a53
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+568b11762723b001bfa693d0f21c5dad01d4e813" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3ab35546558f9acde21e2d95a0c61127742459a846e41ced0693953d33df2937
[INFO] running `Command { std: "docker" "start" "-a" "3ab35546558f9acde21e2d95a0c61127742459a846e41ced0693953d33df2937", kill_on_drop: false }`
[INFO] [stderr] error: failed to download `proc-macro2 v1.0.103`
[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" "3ab35546558f9acde21e2d95a0c61127742459a846e41ced0693953d33df2937", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ab35546558f9acde21e2d95a0c61127742459a846e41ced0693953d33df2937", kill_on_drop: false }`
[INFO] [stdout] 3ab35546558f9acde21e2d95a0c61127742459a846e41ced0693953d33df2937