[INFO] fetching crate rtt-target 0.3.1...
[INFO] documenting rtt-target-0.3.1 against try#6fd27704e643b25711e6a97ec2b04873b411b97d for pr-96676
[INFO] extracting crate rtt-target 0.3.1 into /workspace/builds/worker-13/source
[INFO] validating manifest of crates.io crate rtt-target 0.3.1 on toolchain 6fd27704e643b25711e6a97ec2b04873b411b97d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6fd27704e643b25711e6a97ec2b04873b411b97d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rtt-target 0.3.1
[INFO] finished tweaking crates.io crate rtt-target 0.3.1
[INFO] tweaked toml for crates.io crate rtt-target 0.3.1 written to /workspace/builds/worker-13/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6fd27704e643b25711e6a97ec2b04873b411b97d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6fd27704e643b25711e6a97ec2b04873b411b97d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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" "+6fd27704e643b25711e6a97ec2b04873b411b97d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7ab058f545494774c34a7fd788c9f7e8e57a728246dcdf7ebe25ccdb6af76ace
[INFO] running `Command { std: "docker" "start" "-a" "7ab058f545494774c34a7fd788c9f7e8e57a728246dcdf7ebe25ccdb6af76ace", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7ab058f545494774c34a7fd788c9f7e8e57a728246dcdf7ebe25ccdb6af76ace", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7ab058f545494774c34a7fd788c9f7e8e57a728246dcdf7ebe25ccdb6af76ace", kill_on_drop: false }`
[INFO] [stdout] 7ab058f545494774c34a7fd788c9f7e8e57a728246dcdf7ebe25ccdb6af76ace
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/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=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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+6fd27704e643b25711e6a97ec2b04873b411b97d" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6aba79db79f447708c748cd39d912a7a410873b122cda49e9eccca6f7049bf28
[INFO] running `Command { std: "docker" "start" "-a" "6aba79db79f447708c748cd39d912a7a410873b122cda49e9eccca6f7049bf28", kill_on_drop: false }`
[INFO] [stderr]     Checking ufmt-write v0.1.0
[INFO] [stderr]  Documenting rtt-target v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] error: macro_rules fallback is used during doc link resolution
[INFO] [stdout]   --> src/print.rs:16:35
[INFO] [stdout]    |
[INFO] [stdout] 16 | /// Sets the channel to use for [`rprint`] and [`rprintln`] and the critical section function used
[INFO] [stdout]    |                                   ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[deny(rustdoc::macro_rules_fallback)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: macro_rules fallback is used during doc link resolution
[INFO] [stdout]   --> src/print.rs:16:50
[INFO] [stdout]    |
[INFO] [stdout] 16 | /// Sets the channel to use for [`rprint`] and [`rprintln`] and the critical section function used
[INFO] [stdout]    |                                                  ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `set_print_channel`
[INFO] [stdout]   --> src/print.rs:17:73
[INFO] [stdout]    |
[INFO] [stdout] 17 | /// to synchronize printing. You should only use this function if the [`set_print_channel`] function
[INFO] [stdout]    |                                                                         ^^^^^^^^^^^^^^^^^ no item named `set_print_channel` in scope
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(rustdoc::broken_intra_doc_links)]` on by default
[INFO] [stdout]    = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: macro_rules fallback is used during doc link resolution
[INFO] [stdout]    --> src/print.rs:123:55
[INFO] [stdout]     |
[INFO] [stdout] 123 | /// Before use the print channel has to be set with [`rtt_init_print`] or [`set_print_channel`]. If
[INFO] [stdout]     |                                                       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `set_print_channel`
[INFO] [stdout]    --> src/print.rs:123:77
[INFO] [stdout]     |
[INFO] [stdout] 123 | /// Before use the print channel has to be set with [`rtt_init_print`] or [`set_print_channel`]. If
[INFO] [stdout]     |                                                                             ^^^^^^^^^^^^^^^^^ no item named `set_print_channel` in scope
[INFO] [stdout]     |
[INFO] [stdout]     = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: macro_rules fallback is used during doc link resolution
[INFO] [stdout]    --> src/print.rs:147:55
[INFO] [stdout]     |
[INFO] [stdout] 147 | /// Before use the print channel has to be set with [`rtt_init_print`] or [`set_print_channel`]. If
[INFO] [stdout]     |                                                       ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unresolved link to `set_print_channel`
[INFO] [stdout]    --> src/print.rs:147:77
[INFO] [stdout]     |
[INFO] [stdout] 147 | /// Before use the print channel has to be set with [`rtt_init_print`] or [`set_print_channel`]. If
[INFO] [stdout]     |                                                                             ^^^^^^^^^^^^^^^^^ no item named `set_print_channel` in scope
[INFO] [stdout]     |
[INFO] [stdout]     = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 4 previous errors; 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not document `rtt-target`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name rtt_target src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=7afee7bb636bbfa8 -L dependency=/opt/rustwide/target/debug/deps --extern ufmt_write=/opt/rustwide/target/debug/deps/libufmt_write-fe15738048cfb171.rmeta --cap-lints=forbid --crate-version 0.3.1` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "6aba79db79f447708c748cd39d912a7a410873b122cda49e9eccca6f7049bf28", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6aba79db79f447708c748cd39d912a7a410873b122cda49e9eccca6f7049bf28", kill_on_drop: false }`
[INFO] [stdout] 6aba79db79f447708c748cd39d912a7a410873b122cda49e9eccca6f7049bf28