[INFO] cloning repository https://github.com/fnick851/rust-the-book
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fnick851/rust-the-book" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffnick851%2Frust-the-book", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffnick851%2Frust-the-book'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 89593b4179cbb581f9f7fe49ad516af2d35f0ab7
[INFO] documenting fnick851/rust-the-book against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffnick851%2Frust-the-book" "/workspace/builds/worker-25/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-25/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fnick851/rust-the-book on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/fnick851/rust-the-book
[INFO] finished tweaking git repo https://github.com/fnick851/rust-the-book
[INFO] tweaked toml for git repo https://github.com/fnick851/rust-the-book written to /workspace/builds/worker-25/source/Cargo.toml
[INFO] crate git repo https://github.com/fnick851/rust-the-book already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded smallvec v0.4.5
[INFO] [stderr]   Downloaded ferris-says v0.1.1
[INFO] [stderr]   Downloaded cc v1.0.46
[INFO] [stderr]   Downloaded libc v0.2.65
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4601d5a075b2bf79e02884b5ab470b3df3bda21bb75f771b7cfdc1f753602ab1
[INFO] running `Command { std: "docker" "start" "-a" "4601d5a075b2bf79e02884b5ab470b3df3bda21bb75f771b7cfdc1f753602ab1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4601d5a075b2bf79e02884b5ab470b3df3bda21bb75f771b7cfdc1f753602ab1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4601d5a075b2bf79e02884b5ab470b3df3bda21bb75f771b7cfdc1f753602ab1", kill_on_drop: false }`
[INFO] [stdout] 4601d5a075b2bf79e02884b5ab470b3df3bda21bb75f771b7cfdc1f753602ab1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-25/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 04717ee22bae39dafd4cbd9e91e95325ce4b360cc79eed360cf003a6d1a60ab8
[INFO] running `Command { std: "docker" "start" "-a" "04717ee22bae39dafd4cbd9e91e95325ce4b360cc79eed360cf003a6d1a60ab8", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.46
[INFO] [stderr]     Checking unicode-width v0.1.6
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking smallvec v0.4.5
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]     Checking backtrace v0.3.40
[INFO] [stderr]     Checking error-chain v0.10.0
[INFO] [stderr]     Checking ferris-says v0.1.1
[INFO] [stderr]  Documenting hello_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking hello_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not document `hello_rust`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name trait src/bin/trait.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=836fca1f71f6cd96 -L dependency=/opt/rustwide/target/debug/deps --extern ferris_says=/opt/rustwide/target/debug/deps/libferris_says-ecfa8ea55b30b11a.rmeta --extern hello_rust=/opt/rustwide/target/debug/deps/libhello_rust-03140a9d493e6c5b.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-3300c0fea2d313ad.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: could not document `hello_rust`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name super_path src/bin/super_path.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=137decdff01dfab1 -L dependency=/opt/rustwide/target/debug/deps --extern ferris_says=/opt/rustwide/target/debug/deps/libferris_says-ecfa8ea55b30b11a.rmeta --extern hello_rust=/opt/rustwide/target/debug/deps/libhello_rust-03140a9d493e6c5b.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-3300c0fea2d313ad.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `hello_rust`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name trait2 src/bin/trait2.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=76d0a92afb8bfc64 -L dependency=/opt/rustwide/target/debug/deps --extern ferris_says=/opt/rustwide/target/debug/deps/libferris_says-ecfa8ea55b30b11a.rmeta --extern hello_rust=/opt/rustwide/target/debug/deps/libhello_rust-03140a9d493e6c5b.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-3300c0fea2d313ad.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `hello_rust`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name panic src/bin/panic.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=90742f6e15397785 -L dependency=/opt/rustwide/target/debug/deps --extern ferris_says=/opt/rustwide/target/debug/deps/libferris_says-ecfa8ea55b30b11a.rmeta --extern hello_rust=/opt/rustwide/target/debug/deps/libhello_rust-03140a9d493e6c5b.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-3300c0fea2d313ad.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `hello_rust`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name result src/bin/result.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=5c80910f4d2142ff -L dependency=/opt/rustwide/target/debug/deps --extern ferris_says=/opt/rustwide/target/debug/deps/libferris_says-ecfa8ea55b30b11a.rmeta --extern hello_rust=/opt/rustwide/target/debug/deps/libhello_rust-03140a9d493e6c5b.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-3300c0fea2d313ad.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `hello_rust`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name generics src/bin/generics.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=e53467d0e0c48a78 -L dependency=/opt/rustwide/target/debug/deps --extern ferris_says=/opt/rustwide/target/debug/deps/libferris_says-ecfa8ea55b30b11a.rmeta --extern hello_rust=/opt/rustwide/target/debug/deps/libhello_rust-03140a9d493e6c5b.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-3300c0fea2d313ad.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `hello_rust`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name guessing_game src/bin/guessing_game.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=d3948b5355c2c8dd -L dependency=/opt/rustwide/target/debug/deps --extern ferris_says=/opt/rustwide/target/debug/deps/libferris_says-ecfa8ea55b30b11a.rmeta --extern hello_rust=/opt/rustwide/target/debug/deps/libhello_rust-03140a9d493e6c5b.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-3300c0fea2d313ad.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `hello_rust`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name hash_map src/bin/hash_map.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=8344f8cdf06e088b -L dependency=/opt/rustwide/target/debug/deps --extern ferris_says=/opt/rustwide/target/debug/deps/libferris_says-ecfa8ea55b30b11a.rmeta --extern hello_rust=/opt/rustwide/target/debug/deps/libhello_rust-03140a9d493e6c5b.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-3300c0fea2d313ad.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `hello_rust`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name ref_borrow src/bin/ref_borrow.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=eb1cc0fc8dd0a8ce -L dependency=/opt/rustwide/target/debug/deps --extern ferris_says=/opt/rustwide/target/debug/deps/libferris_says-ecfa8ea55b30b11a.rmeta --extern hello_rust=/opt/rustwide/target/debug/deps/libhello_rust-03140a9d493e6c5b.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-3300c0fea2d313ad.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `hello_rust`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name restrt_lib src/bin/restrt_lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=8c38ef4cc2363b3f -L dependency=/opt/rustwide/target/debug/deps --extern ferris_says=/opt/rustwide/target/debug/deps/libferris_says-ecfa8ea55b30b11a.rmeta --extern hello_rust=/opt/rustwide/target/debug/deps/libhello_rust-03140a9d493e6c5b.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-3300c0fea2d313ad.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `hello_rust`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name use src/bin/use.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=60b61b8df6e26de2 -L dependency=/opt/rustwide/target/debug/deps --extern ferris_says=/opt/rustwide/target/debug/deps/libferris_says-ecfa8ea55b30b11a.rmeta --extern hello_rust=/opt/rustwide/target/debug/deps/libhello_rust-03140a9d493e6c5b.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-3300c0fea2d313ad.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `hello_rust`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name mutability src/bin/mutability.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=e61ebf97bd5b9b98 -L dependency=/opt/rustwide/target/debug/deps --extern ferris_says=/opt/rustwide/target/debug/deps/libferris_says-ecfa8ea55b30b11a.rmeta --extern hello_rust=/opt/rustwide/target/debug/deps/libhello_rust-03140a9d493e6c5b.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-3300c0fea2d313ad.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `hello_rust`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name enum src/bin/enum.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=9bbb71bd9e3160b2 -L dependency=/opt/rustwide/target/debug/deps --extern ferris_says=/opt/rustwide/target/debug/deps/libferris_says-ecfa8ea55b30b11a.rmeta --extern hello_rust=/opt/rustwide/target/debug/deps/libhello_rust-03140a9d493e6c5b.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-3300c0fea2d313ad.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stderr] error: could not document `hello_rust`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name struct src/bin/struct.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=e048a9fea049aad9 -L dependency=/opt/rustwide/target/debug/deps --extern ferris_says=/opt/rustwide/target/debug/deps/libferris_says-ecfa8ea55b30b11a.rmeta --extern hello_rust=/opt/rustwide/target/debug/deps/libhello_rust-03140a9d493e6c5b.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-3300c0fea2d313ad.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] running `Command { std: "docker" "inspect" "04717ee22bae39dafd4cbd9e91e95325ce4b360cc79eed360cf003a6d1a60ab8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "04717ee22bae39dafd4cbd9e91e95325ce4b360cc79eed360cf003a6d1a60ab8", kill_on_drop: false }`
[INFO] [stdout] 04717ee22bae39dafd4cbd9e91e95325ce4b360cc79eed360cf003a6d1a60ab8