[INFO] fetching crate ishmael 0.1.2...
[INFO] documenting ishmael-0.1.2 against try#66dfc4e010913fbed0c4ea91fc2c010004b0f441 for pr-73566
[INFO] extracting crate ishmael 0.1.2 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate ishmael 0.1.2 on toolchain 66dfc4e010913fbed0c4ea91fc2c010004b0f441
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate ishmael 0.1.2
[INFO] finished tweaking crates.io crate ishmael 0.1.2
[INFO] tweaked toml for crates.io crate ishmael 0.1.2 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "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" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "metadata" "--no-deps" "--format-version=1", 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] ab83a9af5f405e9edc85a886b32c99dfe9349876224895ea9d792274b873e019
[INFO] running `Command { std: "docker" "start" "-a" "ab83a9af5f405e9edc85a886b32c99dfe9349876224895ea9d792274b873e019", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ab83a9af5f405e9edc85a886b32c99dfe9349876224895ea9d792274b873e019", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab83a9af5f405e9edc85a886b32c99dfe9349876224895ea9d792274b873e019", kill_on_drop: false }`
[INFO] [stdout] ab83a9af5f405e9edc85a886b32c99dfe9349876224895ea9d792274b873e019
[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" "+66dfc4e010913fbed0c4ea91fc2c010004b0f441" "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] 4057a3fdc7ec27fdbc94a7cc1ac4ef5cd016fd5d095738f48f2e35dadfc7fe3e
[INFO] running `Command { std: "docker" "start" "-a" "4057a3fdc7ec27fdbc94a7cc1ac4ef5cd016fd5d095738f48f2e35dadfc7fe3e", kill_on_drop: false }`
[INFO] [stderr]    Compiling pkg-config v0.3.17
[INFO] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling cc v1.0.56
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]    Compiling openssl-sys v0.7.17
[INFO] [stderr]    Compiling curl-sys v0.1.35
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]    Compiling libz-sys v1.0.25
[INFO] [stderr]     Checking curl v0.2.19
[INFO] [stderr]  Documenting ishmael v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error: environment variable `GITHUB_API_KEY` not defined
[INFO] [stdout]   --> src/ishmael/client.rs:25:41
[INFO] [stdout]    |
[INFO] [stdout] 25 |         let token = format!("token {}", env!("GITHUB_API_KEY"));
[INFO] [stdout]    |                                         ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `ishmael`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name ishmael src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern curl=/opt/rustwide/target/debug/deps/libcurl-87f5d7580b607e26.rmeta --extern rustc_serialize=/opt/rustwide/target/debug/deps/librustc_serialize-7ddf6b4d13e0395e.rmeta --cap-lints=forbid` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "4057a3fdc7ec27fdbc94a7cc1ac4ef5cd016fd5d095738f48f2e35dadfc7fe3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4057a3fdc7ec27fdbc94a7cc1ac4ef5cd016fd5d095738f48f2e35dadfc7fe3e", kill_on_drop: false }`
[INFO] [stdout] 4057a3fdc7ec27fdbc94a7cc1ac4ef5cd016fd5d095738f48f2e35dadfc7fe3e