[INFO] fetching crate fuzzcheck 0.2.1...
[INFO] documenting fuzzcheck-0.2.1 against master#394e1b40d264aa6928811919c1124fa248e7d802 for pr-73566
[INFO] extracting crate fuzzcheck 0.2.1 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate fuzzcheck 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 fuzzcheck 0.2.1
[INFO] finished tweaking crates.io crate fuzzcheck 0.2.1
[INFO] tweaked toml for crates.io crate fuzzcheck 0.2.1 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+394e1b40d264aa6928811919c1124fa248e7d802" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] ea90a67c2d51ab5d3ea17bc7570cb3e9c22f181bb5697ff6a602482dcf029296
[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" "ea90a67c2d51ab5d3ea17bc7570cb3e9c22f181bb5697ff6a602482dcf029296", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ea90a67c2d51ab5d3ea17bc7570cb3e9c22f181bb5697ff6a602482dcf029296", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea90a67c2d51ab5d3ea17bc7570cb3e9c22f181bb5697ff6a602482dcf029296", kill_on_drop: false }`
[INFO] [stdout] ea90a67c2d51ab5d3ea17bc7570cb3e9c22f181bb5697ff6a602482dcf029296
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 6df34eeb88f693b7d628c2c0e654a9140af35b72554673b16c42acd45cadeb0c
[INFO] running `Command { std: "docker" "start" "-a" "6df34eeb88f693b7d628c2c0e654a9140af35b72554673b16c42acd45cadeb0c", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]     Checking fuzzcheck_arg_parser v0.2.1
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_pcg v0.2.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]  Documenting fuzzcheck v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `[Feature::score]` cannot be resolved, ignoring it.
[INFO] [stdout]    --> src/lib.rs:279:39
[INFO] [stdout]     |
[INFO] [stdout] 279 |  * Each feature has a certain [score](Feature::score) that is currently only
[INFO] [stdout]     |                                       ^^^^^^^^^^^^^^ cannot be resolved, ignoring
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(intra_doc_link_resolution_failure)]` on by default
[INFO] [stdout]     = help: to escape `[` and `]` characters, just add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `[FuzzerSettings::corpus_size]` cannot be resolved, ignoring it.
[INFO] [stdout]    --> src/fuzzer.rs:340:39
[INFO] [stdout]     |
[INFO] [stdout] 340 |     /// [`self.settings.corpus_size`](FuzzerSettings::corpus_size)
[INFO] [stdout]     |                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^ cannot be resolved, ignoring
[INFO] [stdout]     |
[INFO] [stdout]     = help: to escape `[` and `]` characters, just add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `[FeatureInPool]` cannot be resolved, ignoring it.
[INFO] [stdout]   --> src/pool.rs:99:32
[INFO] [stdout]    |
[INFO] [stdout] 99 |     /// Holds the key of each [FeatureInPool] associated with this input.
[INFO] [stdout]    |                                ^^^^^^^^^^^^^ cannot be resolved, ignoring
[INFO] [stdout]    |
[INFO] [stdout]    = help: to escape `[` and `]` characters, just add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.50s
[INFO] running `Command { std: "docker" "inspect" "6df34eeb88f693b7d628c2c0e654a9140af35b72554673b16c42acd45cadeb0c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6df34eeb88f693b7d628c2c0e654a9140af35b72554673b16c42acd45cadeb0c", kill_on_drop: false }`
[INFO] [stdout] 6df34eeb88f693b7d628c2c0e654a9140af35b72554673b16c42acd45cadeb0c