[INFO] cloning repository https://github.com/jswrenn/gulog
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jswrenn/gulog" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjswrenn%2Fgulog", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjswrenn%2Fgulog'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b90cdeb4aa9446fd50ae2013c4ee9969f7cab3a4
[INFO] documenting jswrenn/gulog against master#394e1b40d264aa6928811919c1124fa248e7d802 for pr-73566
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjswrenn%2Fgulog" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jswrenn/gulog 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 git repo https://github.com/jswrenn/gulog
[INFO] finished tweaking git repo https://github.com/jswrenn/gulog
[INFO] tweaked toml for git repo https://github.com/jswrenn/gulog written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/jswrenn/gulog 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] 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] 6de70b53018621490b00c1e78206cf1677efffbd2d2e7afff81a061017475687
[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" "6de70b53018621490b00c1e78206cf1677efffbd2d2e7afff81a061017475687", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6de70b53018621490b00c1e78206cf1677efffbd2d2e7afff81a061017475687", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6de70b53018621490b00c1e78206cf1677efffbd2d2e7afff81a061017475687", kill_on_drop: false }`
[INFO] [stdout] 6de70b53018621490b00c1e78206cf1677efffbd2d2e7afff81a061017475687
[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] [stdout] 7d1fc8a77a4a3998f1369fe63f18a6fb7ddb1c16b5866de47a2a7f268ca486f2
[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" "7d1fc8a77a4a3998f1369fe63f18a6fb7ddb1c16b5866de47a2a7f268ca486f2", kill_on_drop: false }`
[INFO] [stderr]  Documenting gulog v0.0.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: identifier contains uncommon Unicode codepoints
[INFO] [stdout]   --> src/main.rs:97:36
[INFO] [stdout]    |
[INFO] [stdout] 97 |         (Term::Structure(Structure(functorₛ, termsₛ)), 
[INFO] [stdout]    |                                    ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(uncommon_codepoints)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: identifier contains uncommon Unicode codepoints
[INFO] [stdout]   --> src/main.rs:97:46
[INFO] [stdout]    |
[INFO] [stdout] 97 |         (Term::Structure(Structure(functorₛ, termsₛ)), 
[INFO] [stdout]    |                                              ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: identifier contains uncommon Unicode codepoints
[INFO] [stdout]   --> src/main.rs:98:36
[INFO] [stdout]    |
[INFO] [stdout] 98 |          Term::Structure(Structure(functorₜ, termsₜ))) =>
[INFO] [stdout]    |                                    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: identifier contains uncommon Unicode codepoints
[INFO] [stdout]   --> src/main.rs:98:46
[INFO] [stdout]    |
[INFO] [stdout] 98 |          Term::Structure(Structure(functorₜ, termsₜ))) =>
[INFO] [stdout]    |                                              ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: identifier contains uncommon Unicode codepoints
[INFO] [stdout]    --> src/main.rs:104:22
[INFO] [stdout]     |
[INFO] [stdout] 104 |                 for (termₛ,termₜ) in zip!(termsₛ,termsₜ) {
[INFO] [stdout]     |                      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: identifier contains uncommon Unicode codepoints
[INFO] [stdout]    --> src/main.rs:104:28
[INFO] [stdout]     |
[INFO] [stdout] 104 |                 for (termₛ,termₜ) in zip!(termsₛ,termsₜ) {
[INFO] [stdout]     |                            ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0635]: unknown feature `collections`
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(collections)]
[INFO] [stdout]   |            ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error; 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0635`.
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `gulog`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name gulog src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --cap-lints=forbid` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "7d1fc8a77a4a3998f1369fe63f18a6fb7ddb1c16b5866de47a2a7f268ca486f2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7d1fc8a77a4a3998f1369fe63f18a6fb7ddb1c16b5866de47a2a7f268ca486f2", kill_on_drop: false }`
[INFO] [stdout] 7d1fc8a77a4a3998f1369fe63f18a6fb7ddb1c16b5866de47a2a7f268ca486f2