[INFO] crate rust-covfix 0.2.1 is already in cache
[INFO] documenting rust-covfix-0.2.1 against master#394e1b40d264aa6928811919c1124fa248e7d802 for pr-73566
[INFO] extracting crate rust-covfix 0.2.1 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate rust-covfix 0.2.1 on toolchain 394e1b40d264aa6928811919c1124fa248e7d802
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rust-covfix 0.2.1
[INFO] finished tweaking crates.io crate rust-covfix 0.2.1
[INFO] tweaked toml for crates.io crate rust-covfix 0.2.1 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate crates.io crate rust-covfix 0.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 06fc27811859a33afc5d0cf341b1369856109ca05df36e1ab8ffa58185e2aacd
[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" "06fc27811859a33afc5d0cf341b1369856109ca05df36e1ab8ffa58185e2aacd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "06fc27811859a33afc5d0cf341b1369856109ca05df36e1ab8ffa58185e2aacd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "06fc27811859a33afc5d0cf341b1369856109ca05df36e1ab8ffa58185e2aacd", kill_on_drop: false }`
[INFO] [stdout] 06fc27811859a33afc5d0cf341b1369856109ca05df36e1ab8ffa58185e2aacd
[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" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-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" "--network" "none" "rustops/crates-build-env@sha256:819119df93c0f5eca3f29186f14981ef29945a311854d7222af07488600a2584" "/opt/rustwide/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 85041b09b17e11d13c4a6f4d2a3b4a7af231a01a0621a8a7ab0eb8494a9df890
[INFO] running `Command { std: "docker" "start" "-a" "85041b09b17e11d13c4a6f4d2a3b4a7af231a01a0621a8a7ab0eb8494a9df890", kill_on_drop: false }`
[INFO] [stderr] warning: output filename collision.
[INFO] [stderr] The bin target `rust-covfix` in package `rust-covfix v0.2.1 (/opt/rustwide/workdir)` has the same output filename as the lib target `rust_covfix` in package `rust-covfix v0.2.1 (/opt/rustwide/workdir)`.
[INFO] [stderr] Colliding filename is: /opt/rustwide/target/doc/rust_covfix/index.html
[INFO] [stderr] The output filenames should be unique.
[INFO] [stderr] This is a known bug where multiple crates with the same name use
[INFO] [stderr] the same path; see <https://github.com/rust-lang/cargo/issues/6313>.
[INFO] [stderr] If this looks unexpected, it may be a bug in Cargo. Please file a bug report at
[INFO] [stderr] https://github.com/rust-lang/cargo/issues/ with as much information as you
[INFO] [stderr] can provide.
[INFO] [stderr] cargo 1.46.0-nightly (c26576f9a 2020-06-23) running on `x86_64-unknown-linux-gnu` target `x86_64-unknown-linux-gnu`
[INFO] [stderr] First unit: Unit { pkg: Package { id: PackageId { name: "rust-covfix", version: "0.2.1", source: "/opt/rustwide/workdir" }, ..: ".." }, target: TargetInner { name: "rust-covfix", required_features: Some(["cli"]), tested: false, doc: true, ..: with_path("/opt/rustwide/workdir/src/main.rs", Edition2018) }, profile: Profile { name: "doc", debuginfo: Some(2), debug_assertions: true, overflow_checks: true, ..: default() }, kind: Host, mode: Doc { deps: false }, features: ["argparse", "cli", "default", "lcov"] }
[INFO] [stderr] Second unit: Unit { pkg: Package { id: PackageId { name: "rust-covfix", version: "0.2.1", source: "/opt/rustwide/workdir" }, ..: ".." }, target: TargetInner { doctest: false, ..: lib_target("rust_covfix", ["lib"], "/opt/rustwide/workdir/src/lib.rs", Edition2018) }, profile: Profile { name: "doc", debuginfo: Some(2), debug_assertions: true, overflow_checks: true, ..: default() }, kind: Host, mode: Doc { deps: false }, features: ["argparse", "cli", "default", "lcov"] }
[INFO] [stderr]    Compiling version_check v0.9.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]     Checking unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]     Checking regex-syntax v0.6.17
[INFO] [stderr]     Checking argparse v0.2.2
[INFO] [stderr]    Compiling error-chain v0.12.2
[INFO] [stderr]     Checking regex v1.3.7
[INFO] [stderr]     Checking rust-covfix v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting rust-covfix v0.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 11.39s
[INFO] running `Command { std: "docker" "inspect" "85041b09b17e11d13c4a6f4d2a3b4a7af231a01a0621a8a7ab0eb8494a9df890", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "85041b09b17e11d13c4a6f4d2a3b4a7af231a01a0621a8a7ab0eb8494a9df890", kill_on_drop: false }`
[INFO] [stdout] 85041b09b17e11d13c4a6f4d2a3b4a7af231a01a0621a8a7ab0eb8494a9df890