[INFO] fetching crate mockiato 0.9.5...
[INFO] building mockiato-0.9.5 against master#d5c88c22807925c189328ef9d923c5d2b11a95b8 for pr-87066-3
[INFO] extracting crate mockiato 0.9.5 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate mockiato 0.9.5 on toolchain d5c88c22807925c189328ef9d923c5d2b11a95b8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-4/source/rust-toolchain
[INFO] started tweaking crates.io crate mockiato 0.9.5
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate mockiato 0.9.5
[INFO] tweaked toml for crates.io crate mockiato 0.9.5 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate mockiato 0.9.5 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7bfc476e11b9dd92bacb134c37df3c498999607f0e91e230442bc6b81cfdb783
[INFO] running `Command { std: "docker" "start" "-a" "7bfc476e11b9dd92bacb134c37df3c498999607f0e91e230442bc6b81cfdb783", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7bfc476e11b9dd92bacb134c37df3c498999607f0e91e230442bc6b81cfdb783", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7bfc476e11b9dd92bacb134c37df3c498999607f0e91e230442bc6b81cfdb783", kill_on_drop: false }`
[INFO] [stdout] 7bfc476e11b9dd92bacb134c37df3c498999607f0e91e230442bc6b81cfdb783
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=forbid" "-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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4d1db0687aa2f8247c17bc330c3a30ca612a44ac9bbd4ff860fe7ff834326a36
[INFO] running `Command { std: "docker" "start" "-a" "4d1db0687aa2f8247c17bc330c3a30ca612a44ac9bbd4ff860fe7ff834326a36", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.4
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]    Compiling unicode-segmentation v1.3.0
[INFO] [stderr]    Compiling nearly_eq v0.2.4
[INFO] [stderr]    Compiling nameof v1.1.0
[INFO] [stderr]    Compiling mockiato-codegen v0.9.5
[INFO] [stderr]    Compiling mockiato v0.9.5 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stdout] error[E0557]: feature has been removed
[INFO] [stdout]    --> src/lib.rs:110:48
[INFO] [stdout]     |
[INFO] [stdout] 110 | #![cfg_attr(rustc_is_nightly, feature(doc_cfg, external_doc, specialization))]
[INFO] [stdout]     |                                                ^^^^^^^^^^^^ feature has been removed
[INFO] [stdout]     |
[INFO] [stdout]     = note: use #[doc = include_str!("filename")] instead, which handles macro invocations
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: the feature `specialization` is incomplete and may not be safe to use and/or cause compiler crashes
[INFO] [stdout]    --> src/lib.rs:110:62
[INFO] [stdout]     |
[INFO] [stdout] 110 | #![cfg_attr(rustc_is_nightly, feature(doc_cfg, external_doc, specialization))]
[INFO] [stdout]     |                                                              ^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(incomplete_features)]` on by default
[INFO] [stdout]     = note: see issue #31844 <https://github.com/rust-lang/rust/issues/31844> for more information
[INFO] [stdout]     = help: consider using `min_specialization` instead, which is more stable and complete
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: unknown `doc` attribute `include`
[INFO] [stdout]    --> src/lib.rs:207:34
[INFO] [stdout]     |
[INFO] [stdout] 207 | #[cfg_attr(rustc_is_nightly, doc(include = "../readme.md"))]
[INFO] [stdout]     |                              ----^^^^^^^^^^^^^^^^^^^^^^^^- help: use `doc = include_str!` instead: `#[doc = include_str!("../readme.md")]`
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:119:5
[INFO] [stdout]     |
[INFO] [stdout] 119 |     future_incompatible,
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     = note: `#[deny(invalid_doc_attributes)]` implied by `#[deny(future_incompatible)]`
[INFO] [stdout]     = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
[INFO] [stdout]     = note: for more information, see issue #82730 <https://github.com/rust-lang/rust/issues/82730>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors; 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0557`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mockiato` due to 3 previous errors; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "4d1db0687aa2f8247c17bc330c3a30ca612a44ac9bbd4ff860fe7ff834326a36", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4d1db0687aa2f8247c17bc330c3a30ca612a44ac9bbd4ff860fe7ff834326a36", kill_on_drop: false }`
[INFO] [stdout] 4d1db0687aa2f8247c17bc330c3a30ca612a44ac9bbd4ff860fe7ff834326a36