[INFO] fetching crate mockall 0.11.4...
[INFO] documenting mockall-0.11.4 against 1.75.0 for beta-1.76-rustdoc-1
[INFO] extracting crate mockall 0.11.4 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate mockall 0.11.4 on toolchain 1.75.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate mockall 0.11.4
[INFO] removed 1 missing examples
[INFO] finished tweaking crates.io crate mockall 0.11.4
[INFO] tweaked toml for crates.io crate mockall 0.11.4 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate crates.io crate mockall 0.11.4 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.75.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded predicates-core v1.0.3
[INFO] [stderr]   Downloaded termtree v0.2.4
[INFO] [stderr]   Downloaded futures-core v0.3.27
[INFO] [stderr]   Downloaded futures-io v0.3.27
[INFO] [stderr]   Downloaded futures-channel v0.3.27
[INFO] [stderr]   Downloaded async-trait v0.1.66
[INFO] [stderr]   Downloaded futures-sink v0.3.27
[INFO] [stderr]   Downloaded serde_json v1.0.94
[INFO] [stderr]   Downloaded serde_derive v1.0.156
[INFO] [stderr]   Downloaded serde v1.0.158
[INFO] [stderr]   Downloaded predicates-tree v1.0.5
[INFO] [stderr]   Downloaded mockall_double v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3ef1c4b7c28b3cb0bc2c26f3d8a6dc1e4d179c63b07c6912d128a74b3c44a33e
[INFO] running `Command { std: "docker" "start" "-a" "3ef1c4b7c28b3cb0bc2c26f3d8a6dc1e4d179c63b07c6912d128a74b3c44a33e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3ef1c4b7c28b3cb0bc2c26f3d8a6dc1e4d179c63b07c6912d128a74b3c44a33e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ef1c4b7c28b3cb0bc2c26f3d8a6dc1e4d179c63b07c6912d128a74b3c44a33e", kill_on_drop: false }`
[INFO] [stdout] 3ef1c4b7c28b3cb0bc2c26f3d8a6dc1e4d179c63b07c6912d128a74b3c44a33e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTFLAGS=--cap-lints=warn" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c7d4d461ff3869eff46b39a69e76743e8fc5fb098440f849224403156acddf50
[INFO] running `Command { std: "docker" "start" "-a" "c7d4d461ff3869eff46b39a69e76743e8fc5fb098440f849224403156acddf50", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.54
[INFO] [stderr]     Checking either v1.8.1
[INFO] [stderr]     Checking predicates-core v1.0.3
[INFO] [stderr]     Checking difflib v0.4.0
[INFO] [stderr]     Checking termtree v0.2.4
[INFO] [stderr]     Checking normalize-line-endings v0.3.0
[INFO] [stderr]     Checking downcast v0.11.0
[INFO] [stderr]     Checking fragile v2.0.0
[INFO] [stderr]    Compiling num-traits v0.2.15
[INFO] [stderr]     Checking predicates-tree v1.0.5
[INFO] [stderr]     Checking itertools v0.10.5
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking float-cmp v0.9.0
[INFO] [stderr]     Checking predicates v2.1.0
[INFO] [stderr]    Compiling mockall_derive v0.11.4
[INFO] [stderr]  Documenting mockall v0.11.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.83s
[INFO] [stderr]    Generated /opt/rustwide/target/doc/mockall/index.html
[INFO] running `Command { std: "docker" "inspect" "c7d4d461ff3869eff46b39a69e76743e8fc5fb098440f849224403156acddf50", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c7d4d461ff3869eff46b39a69e76743e8fc5fb098440f849224403156acddf50", kill_on_drop: false }`
[INFO] [stdout] c7d4d461ff3869eff46b39a69e76743e8fc5fb098440f849224403156acddf50
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTFLAGS=--cap-lints=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-e" "RUSTC_BOOTSTRAP=1" "-e" "DOCS_RS=1" "-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+1.75.0" "rustdoc" "--lib" "-Zrustdoc-map" "--features" "nightly" "-Z" "unstable-options" "--config" "build.rustdocflags=[\"-Z\", \"unstable-options\", \"--document-private-items\"]" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] de1369128d07f53464911c9140b75aaefd6f416ae74550f2bc3aa22eeacc250b
[INFO] running `Command { std: "docker" "start" "-a" "de1369128d07f53464911c9140b75aaefd6f416ae74550f2bc3aa22eeacc250b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.54
[INFO] [stderr]     Checking downcast v0.11.0
[INFO] [stderr]    Compiling quote v1.0.26
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling mockall_derive v0.11.4
[INFO] [stdout] error[E0599]: no method named `unstable` found for struct `proc_macro2::Span` in the current scope
[INFO] [stdout]   --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/mockall_derive-0.11.4/src/lib.rs:47:18
[INFO] [stdout]    |
[INFO] [stdout] 47 |             span.unstable()
[INFO] [stdout]    |                  ^^^^^^^^ method not found in `Span`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0599`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mockall_derive` (lib) due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "de1369128d07f53464911c9140b75aaefd6f416ae74550f2bc3aa22eeacc250b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de1369128d07f53464911c9140b75aaefd6f416ae74550f2bc3aa22eeacc250b", kill_on_drop: false }`
[INFO] [stdout] de1369128d07f53464911c9140b75aaefd6f416ae74550f2bc3aa22eeacc250b
