[INFO] fetching crate proc-test-catalog 0.1.0...
[INFO] documenting proc-test-catalog-0.1.0 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate proc-test-catalog 0.1.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate proc-test-catalog 0.1.0 on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate proc-test-catalog 0.1.0
[INFO] finished tweaking crates.io crate proc-test-catalog 0.1.0
[INFO] tweaked toml for crates.io crate proc-test-catalog 0.1.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded cargo_toml v0.10.3
[INFO] [stderr]   Downloaded fallible-streaming-iterator v0.1.9
[INFO] [stderr]   Downloaded os_str_bytes v6.1.0
[INFO] [stderr]   Downloaded hashlink v0.7.0
[INFO] [stderr]   Downloaded git2 v0.13.25
[INFO] [stderr]   Downloaded test-catalog v0.1.0
[INFO] [stderr]   Downloaded rusqlite v0.26.3
[INFO] [stderr]   Downloaded libgit2-sys v0.12.26+1.3.0
[INFO] [stderr]   Downloaded libsqlite3-sys v0.23.2
[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" "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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "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] a2faa439dfb397c479b23f543269a201309698378d6b6fedce227afa73b2dca1
[INFO] running `Command { std: "docker" "start" "-a" "a2faa439dfb397c479b23f543269a201309698378d6b6fedce227afa73b2dca1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a2faa439dfb397c479b23f543269a201309698378d6b6fedce227afa73b2dca1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a2faa439dfb397c479b23f543269a201309698378d6b6fedce227afa73b2dca1", kill_on_drop: false }`
[INFO] [stdout] a2faa439dfb397c479b23f543269a201309698378d6b6fedce227afa73b2dca1
[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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9290a88bfcdda83980fa2f607648f650d364a226853f1c387f3970781e70d923
[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" "9290a88bfcdda83980fa2f607648f650d364a226853f1c387f3970781e70d923", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]    Compiling pkg-config v0.3.25
[INFO] [stderr]    Compiling serde v1.0.137
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]     Checking once_cell v1.12.0
[INFO] [stderr]    Compiling vcpkg v0.2.15
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]    Compiling serde_test v1.0.137
[INFO] [stderr]     Checking ryu v1.0.10
[INFO] [stderr]     Checking os_str_bytes v6.1.0
[INFO] [stderr]     Checking unicode-ident v1.0.0
[INFO] [stderr]     Checking fallible-iterator v0.2.0
[INFO] [stderr]     Checking itoa v1.0.2
[INFO] [stderr]     Checking fallible-streaming-iterator v0.1.9
[INFO] [stderr]     Checking openssl-probe v0.1.5
[INFO] [stderr]     Checking project-root v0.2.2
[INFO] [stderr]    Compiling ahash v0.7.6
[INFO] [stderr]    Compiling indexmap v1.8.2
[INFO] [stderr]     Checking itertools v0.10.3
[INFO] [stderr]     Checking proc-macro2 v1.0.39
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking clap_lex v0.2.0
[INFO] [stderr]     Checking quote v1.0.18
[INFO] [stderr]    Compiling jobserver v0.1.24
[INFO] [stderr]     Checking getrandom v0.2.6
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]    Compiling cc v1.0.73
[INFO] [stderr]     Checking hashbrown v0.11.2
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking hashlink v0.7.0
[INFO] [stderr]    Compiling libz-sys v1.1.8
[INFO] [stderr]    Compiling openssl-sys v0.9.73
[INFO] [stderr]    Compiling libssh2-sys v0.2.23
[INFO] [stderr]    Compiling libgit2-sys v0.12.26+1.3.0
[INFO] [stderr]    Compiling libsqlite3-sys v0.23.2
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling clap_derive v3.1.18
[INFO] [stderr]    Compiling serde_derive v1.0.137
[INFO] [stderr]     Checking toml v0.5.9
[INFO] [stderr]     Checking bstr v0.2.17
[INFO] [stderr]     Checking serde_json v1.0.81
[INFO] [stderr]     Checking linked-hash-map v0.5.4
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking clap v3.1.18
[INFO] [stderr]     Checking git2 v0.13.25
[INFO] [stderr]     Checking cargo_toml v0.10.3
[INFO] [stderr]     Checking rusqlite v0.26.3
[INFO] [stderr]     Checking test-catalog v0.1.0
[INFO] [stderr]  Documenting proc-test-catalog v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![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 `proc-test-catalog`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type proc-macro --crate-name proc_test_catalog src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=8f71dc2240fc86ca -L dependency=/opt/rustwide/target/debug/deps --extern git2=/opt/rustwide/target/debug/deps/libgit2-69f247047e2f4198.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-c3e915a3b5e36158.rmeta --extern proc_macro2=/opt/rustwide/target/debug/deps/libproc_macro2-c1d3bfa6658bd3cb.rmeta --extern quote=/opt/rustwide/target/debug/deps/libquote-5e860005d80c271d.rmeta --extern syn=/opt/rustwide/target/debug/deps/libsyn-e10b46b30f50a15a.rmeta --extern test_catalog=/opt/rustwide/target/debug/deps/libtest_catalog-162ad59d21c4e9f9.rmeta --extern proc_macro --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "9290a88bfcdda83980fa2f607648f650d364a226853f1c387f3970781e70d923", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9290a88bfcdda83980fa2f607648f650d364a226853f1c387f3970781e70d923", kill_on_drop: false }`
[INFO] [stdout] 9290a88bfcdda83980fa2f607648f650d364a226853f1c387f3970781e70d923