[INFO] fetching crate flowmacro 0.95.0...
[INFO] documenting flowmacro-0.95.0 against 1.69.0 for beta-1.70-rustdoc-1
[INFO] extracting crate flowmacro 0.95.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate flowmacro 0.95.0 on toolchain 1.69.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate flowmacro 0.95.0
[INFO] finished tweaking crates.io crate flowmacro 0.95.0
[INFO] tweaked toml for crates.io crate flowmacro 0.95.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" __CARGO_TEST_CHANNEL_OVERRIDE_DO_NOT_USE_THIS="nightly" "/workspace/cargo-home/bin/cargo" "+1.69.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.69.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded shrinkwraprs v0.3.0
[INFO] [stderr]   Downloaded flowcore v0.95.0
[INFO] [stderr]   Downloaded simpath v2.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bc52f9b200811ba64b2e04358503fc54e898493de5ad3043fb9f7ba966dd4d4f
[INFO] running `Command { std: "docker" "start" "-a" "bc52f9b200811ba64b2e04358503fc54e898493de5ad3043fb9f7ba966dd4d4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bc52f9b200811ba64b2e04358503fc54e898493de5ad3043fb9f7ba966dd4d4f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc52f9b200811ba64b2e04358503fc54e898493de5ad3043fb9f7ba966dd4d4f", kill_on_drop: false }`
[INFO] [stdout] bc52f9b200811ba64b2e04358503fc54e898493de5ad3043fb9f7ba966dd4d4f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+1.69.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] a149fba73a5d46c03ba31bea39acf3f5aedfb266d55873a54a0f943d18a54e58
[INFO] running `Command { std: "docker" "start" "-a" "a149fba73a5d46c03ba31bea39acf3f5aedfb266d55873a54a0f943d18a54e58", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling serde v1.0.160
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking tinyvec_macros v0.1.1
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]     Checking percent-encoding v2.2.0
[INFO] [stderr]    Compiling curl v0.4.44
[INFO] [stderr]     Checking gimli v0.27.2
[INFO] [stderr]    Compiling libc v0.2.142
[INFO] [stderr]    Compiling openssl-sys v0.9.87
[INFO] [stderr]    Compiling libz-sys v1.1.9
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling curl-sys v0.4.61+curl-8.0.1
[INFO] [stderr]    Compiling backtrace v0.3.67
[INFO] [stderr]    Compiling syn v2.0.15
[INFO] [stderr]     Checking unicode-bidi v0.3.13
[INFO] [stderr]     Checking tinyvec v1.6.0
[INFO] [stderr]     Checking matches v0.1.10
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking form_urlencoded v1.1.0
[INFO] [stderr]     Checking ryu v1.0.13
[INFO] [stderr]     Checking miniz_oxide v0.6.2
[INFO] [stderr]    Compiling serde_json v1.0.96
[INFO] [stderr]     Checking winnow v0.4.4
[INFO] [stderr]     Checking openssl-probe v0.1.5
[INFO] [stderr]    Compiling either v1.8.1
[INFO] [stderr]     Checking itoa v1.0.6
[INFO] [stderr]     Checking rustc-demangle v0.1.23
[INFO] [stderr]    Compiling error-chain v0.12.4
[INFO] [stderr]     Checking unsafe-libyaml v0.2.8
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]     Checking object v0.30.3
[INFO] [stderr]     Checking log v0.4.17
[INFO] [stderr]     Checking socket2 v0.4.9
[INFO] [stderr]     Checking unicode-normalization v0.1.22
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]    Compiling serde_derive v1.0.160
[INFO] [stderr]     Checking addr2line v0.19.0
[INFO] [stderr]    Compiling shrinkwraprs v0.3.0
[INFO] [stderr]     Checking serde_spanned v0.6.1
[INFO] [stderr]     Checking toml_datetime v0.6.1
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]     Checking serde_yaml v0.9.21
[INFO] [stderr]     Checking toml_edit v0.19.8
[INFO] [stderr]     Checking simpath v2.3.0
[INFO] [stderr]     Checking toml v0.7.3
[INFO] [stderr]     Checking flowcore v0.95.0
[INFO] [stderr]  Documenting flowmacro v0.95.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(proc_macro_span)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^
[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 E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `flowmacro`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type proc-macro --crate-name flowmacro src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=4bc79a23c2c781df -L dependency=/opt/rustwide/target/debug/deps --extern flowcore=/opt/rustwide/target/debug/deps/libflowcore-f4d14c01e424ca12.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-b4428f0723261f03.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-25938768891e3290.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-6f1c698a86ec4cf2.rmeta --extern toml=/opt/rustwide/target/debug/deps/libtoml-b96d6e9b6acd4f64.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.95.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "a149fba73a5d46c03ba31bea39acf3f5aedfb266d55873a54a0f943d18a54e58", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a149fba73a5d46c03ba31bea39acf3f5aedfb266d55873a54a0f943d18a54e58", kill_on_drop: false }`
[INFO] [stdout] a149fba73a5d46c03ba31bea39acf3f5aedfb266d55873a54a0f943d18a54e58
