[INFO] cloning repository https://github.com/waleedsamy/hello_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/waleedsamy/hello_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwaleedsamy%2Fhello_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwaleedsamy%2Fhello_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 02d88d7bff515cc02cada6d0ccd92b18f41078c1
[INFO] documenting waleedsamy/hello_rust against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fwaleedsamy%2Fhello_rust" "/workspace/builds/worker-36/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-36/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/waleedsamy/hello_rust on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/waleedsamy/hello_rust
[INFO] finished tweaking git repo https://github.com/waleedsamy/hello_rust
[INFO] tweaked toml for git repo https://github.com/waleedsamy/hello_rust written to /workspace/builds/worker-36/source/Cargo.toml
[INFO] crate git repo https://github.com/waleedsamy/hello_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/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" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 741acca482093bd6edf14fc88c120a78db2a7d69a57949a1235ce7221120353c
[INFO] running `Command { std: "docker" "start" "-a" "741acca482093bd6edf14fc88c120a78db2a7d69a57949a1235ce7221120353c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "741acca482093bd6edf14fc88c120a78db2a7d69a57949a1235ce7221120353c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "741acca482093bd6edf14fc88c120a78db2a7d69a57949a1235ce7221120353c", kill_on_drop: false }`
[INFO] [stdout] 741acca482093bd6edf14fc88c120a78db2a7d69a57949a1235ce7221120353c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-36/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" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] de145b0aedae1aa37dddf1c38074742f10552d80b702ea9cb8ce485a49bca1cc
[INFO] running `Command { std: "docker" "start" "-a" "de145b0aedae1aa37dddf1c38074742f10552d80b702ea9cb8ce485a49bca1cc", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.80
[INFO] [stderr]     Checking unicode-segmentation v1.6.0
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking hello_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting hello_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field is never read: `text`
[INFO] [stdout]   --> src/lib/gui.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 18 |     text: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] note: `Button` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/lib/gui.rs:16:10
[INFO] [stdout]    |
[INFO] [stdout] 16 | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `text`
[INFO] [stdout]   --> src/lib/gui.rs:28:5
[INFO] [stdout]    |
[INFO] [stdout] 28 |     text: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout] note: `TextBox` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   --> src/lib/gui.rs:26:10
[INFO] [stdout]    |
[INFO] [stdout] 26 | #[derive(Debug)]
[INFO] [stdout]    |          ^^^^^
[INFO] [stdout]    = note: this warning originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/bin/learn_vectors.rs:42:6
[INFO] [stdout]    |
[INFO] [stdout] 42 |     };
[INFO] [stdout]    |      ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[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 learn_closures src/bin/learn_closures.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=97bc378835e80952 -L dependency=/opt/rustwide/target/debug/deps --extern hello=/opt/rustwide/target/debug/deps/libhello-d64e907dc377faee.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-a64722dcd28011b8.rmeta --extern unicode_segmentation=/opt/rustwide/target/debug/deps/libunicode_segmentation-9b94be259dab1633.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 learn_iterators src/bin/learn_iterators.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=cef85aa1296f8f8b -L dependency=/opt/rustwide/target/debug/deps --extern hello=/opt/rustwide/target/debug/deps/libhello-d64e907dc377faee.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-a64722dcd28011b8.rmeta --extern unicode_segmentation=/opt/rustwide/target/debug/deps/libunicode_segmentation-9b94be259dab1633.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 learn_enum src/bin/learn_enum.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=acb314f7131f3ce8 -L dependency=/opt/rustwide/target/debug/deps --extern hello=/opt/rustwide/target/debug/deps/libhello-d64e907dc377faee.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-a64722dcd28011b8.rmeta --extern unicode_segmentation=/opt/rustwide/target/debug/deps/libunicode_segmentation-9b94be259dab1633.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 learn_struct src/bin/learn_struct.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=3738e611e9383021 -L dependency=/opt/rustwide/target/debug/deps --extern hello=/opt/rustwide/target/debug/deps/libhello-d64e907dc377faee.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-a64722dcd28011b8.rmeta --extern unicode_segmentation=/opt/rustwide/target/debug/deps/libunicode_segmentation-9b94be259dab1633.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 learn_pattern_matches src/bin/learn_pattern_matches.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=75fa247140fab188 -L dependency=/opt/rustwide/target/debug/deps --extern hello=/opt/rustwide/target/debug/deps/libhello-d64e907dc377faee.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-a64722dcd28011b8.rmeta --extern unicode_segmentation=/opt/rustwide/target/debug/deps/libunicode_segmentation-9b94be259dab1633.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 learn_lifetimes src/bin/learn_lifetimes.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=1c0200416d71c08f -L dependency=/opt/rustwide/target/debug/deps --extern hello=/opt/rustwide/target/debug/deps/libhello-d64e907dc377faee.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-a64722dcd28011b8.rmeta --extern unicode_segmentation=/opt/rustwide/target/debug/deps/libunicode_segmentation-9b94be259dab1633.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 learn_hashmap src/bin/learn_hashmap.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=e1997e716ac8ecbf -L dependency=/opt/rustwide/target/debug/deps --extern hello=/opt/rustwide/target/debug/deps/libhello-d64e907dc377faee.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-a64722dcd28011b8.rmeta --extern unicode_segmentation=/opt/rustwide/target/debug/deps/libunicode_segmentation-9b94be259dab1633.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 learn_generics src/bin/learn_generics.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=d167dc1ab4e022a3 -L dependency=/opt/rustwide/target/debug/deps --extern hello=/opt/rustwide/target/debug/deps/libhello-d64e907dc377faee.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-a64722dcd28011b8.rmeta --extern unicode_segmentation=/opt/rustwide/target/debug/deps/libunicode_segmentation-9b94be259dab1633.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 learn_box_rc src/bin/learn_box_rc.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items '-Arustdoc::private-intra-doc-links' -C metadata=d9fa64d953ee49a0 -L dependency=/opt/rustwide/target/debug/deps --extern hello=/opt/rustwide/target/debug/deps/libhello-d64e907dc377faee.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-a64722dcd28011b8.rmeta --extern unicode_segmentation=/opt/rustwide/target/debug/deps/libunicode_segmentation-9b94be259dab1633.rmeta --cap-lints=warn --crate-version 0.1.0` (signal: 9, SIGKILL: kill)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "de145b0aedae1aa37dddf1c38074742f10552d80b702ea9cb8ce485a49bca1cc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de145b0aedae1aa37dddf1c38074742f10552d80b702ea9cb8ce485a49bca1cc", kill_on_drop: false }`
[INFO] [stdout] de145b0aedae1aa37dddf1c38074742f10552d80b702ea9cb8ce485a49bca1cc