[INFO] fetching crate merkle_sigs 1.7.0...
[INFO] documenting merkle_sigs-1.7.0 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate merkle_sigs 1.7.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate merkle_sigs 1.7.0 on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate merkle_sigs 1.7.0
[INFO] finished tweaking crates.io crate merkle_sigs 1.7.0
[INFO] tweaked toml for crates.io crate merkle_sigs 1.7.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aca0d9b12331c40a4493c2849b0050a8fef083d7c2781dc2fb72951592558032
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "aca0d9b12331c40a4493c2849b0050a8fef083d7c2781dc2fb72951592558032", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aca0d9b12331c40a4493c2849b0050a8fef083d7c2781dc2fb72951592558032", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aca0d9b12331c40a4493c2849b0050a8fef083d7c2781dc2fb72951592558032", kill_on_drop: false }`
[INFO] [stdout] aca0d9b12331c40a4493c2849b0050a8fef083d7c2781dc2fb72951592558032
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "RUSTDOCFLAGS=--cap-lints=warn" "-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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9e8ec58f6ef27113585d02e928bf048f0c2fd9e973cff40c1266773a9baa265e
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9e8ec58f6ef27113585d02e928bf048f0c2fd9e973cff40c1266773a9baa265e", kill_on_drop: false }`
[INFO] [stderr]    Compiling protobuf v2.17.0
[INFO] [stderr]     Checking lamport_sigs v0.7.0
[INFO] [stderr]    Compiling tempfile v3.1.0
[INFO] [stderr]    Compiling thiserror v1.0.20
[INFO] [stderr]    Compiling which v4.0.2
[INFO] [stderr]    Compiling protoc v2.17.0
[INFO] [stderr]    Compiling protobuf-codegen v2.17.0
[INFO] [stderr]    Compiling protoc-rust v2.17.0
[INFO] [stderr]    Compiling merkle v1.11.0
[INFO] [stderr] error: failed to run custom build command for `merkle v1.11.0`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `/opt/rustwide/target/debug/build/merkle-4816115f96ab35e5/build-script-build` (exit code: 1)
[INFO] [stderr]   --- stderr
[INFO] [stderr]   Build failed because merkle.rs could not find protobuf version 3.7.1
[INFO] [stderr] 
[INFO] running `Command { std: "docker" "inspect" "9e8ec58f6ef27113585d02e928bf048f0c2fd9e973cff40c1266773a9baa265e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e8ec58f6ef27113585d02e928bf048f0c2fd9e973cff40c1266773a9baa265e", kill_on_drop: false }`
[INFO] [stdout] 9e8ec58f6ef27113585d02e928bf048f0c2fd9e973cff40c1266773a9baa265e