[INFO] fetching crate rtt-target 0.3.1...
[INFO] documenting rtt-target-0.3.1 against master#e1df625306f4136949e02612406f0c60df6008f3 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 e1df625306f4136949e02612406f0c60df6008f3
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+e1df625306f4136949e02612406f0c60df6008f3" "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" "+e1df625306f4136949e02612406f0c60df6008f3" "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" "+e1df625306f4136949e02612406f0c60df6008f3" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded riscv-target v0.1.2
[INFO] [stderr]   Downloaded ufmt-write v0.1.0
[INFO] [stderr]   Downloaded riscv v0.6.0
[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" "+e1df625306f4136949e02612406f0c60df6008f3" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d42127aeaeee889a3f8000d2a5071d8adc89685aefdaf6b3a44950eb62da35f1
[INFO] running `Command { std: "docker" "start" "-a" "d42127aeaeee889a3f8000d2a5071d8adc89685aefdaf6b3a44950eb62da35f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d42127aeaeee889a3f8000d2a5071d8adc89685aefdaf6b3a44950eb62da35f1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d42127aeaeee889a3f8000d2a5071d8adc89685aefdaf6b3a44950eb62da35f1", kill_on_drop: false }`
[INFO] [stdout] d42127aeaeee889a3f8000d2a5071d8adc89685aefdaf6b3a44950eb62da35f1
[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" "+e1df625306f4136949e02612406f0c60df6008f3" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 4235632b96d67055f3c008a2bd32241627639a0d1eb19ff82b5c756e2c1d60ef
[INFO] running `Command { std: "docker" "start" "-a" "4235632b96d67055f3c008a2bd32241627639a0d1eb19ff82b5c756e2c1d60ef", 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] 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] 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] 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] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.81s
[INFO] running `Command { std: "docker" "inspect" "4235632b96d67055f3c008a2bd32241627639a0d1eb19ff82b5c756e2c1d60ef", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4235632b96d67055f3c008a2bd32241627639a0d1eb19ff82b5c756e2c1d60ef", kill_on_drop: false }`
[INFO] [stdout] 4235632b96d67055f3c008a2bd32241627639a0d1eb19ff82b5c756e2c1d60ef
[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" "RUSTFLAGS=--cap-lints=forbid" "-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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+e1df625306f4136949e02612406f0c60df6008f3" "rustdoc" "--lib" "-Zrustdoc-map" "--features" "cortex-m" "--frozen" "--message-format=json" "--" "-Z" "unstable-options" "--document-private-items", kill_on_drop: false }`
[INFO] [stdout] ac4bead26c8c52c655b3f50d52277ff7f4bd03e0b7d38bd3ffea91178666b917
[INFO] running `Command { std: "docker" "start" "-a" "ac4bead26c8c52c655b3f50d52277ff7f4bd03e0b7d38bd3ffea91178666b917", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]     Checking nb v1.0.0
[INFO] [stderr]     Checking vcell v0.1.3
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]    Compiling cortex-m v0.7.4
[INFO] [stderr]     Checking bitfield v0.13.2
[INFO] [stderr]     Checking ufmt-write v0.1.0
[INFO] [stderr]     Checking volatile-register v0.2.1
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]     Checking nb v0.1.3
[INFO] [stderr]     Checking embedded-hal v0.2.7
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling bare-metal v0.2.5
[INFO] [stderr]  Documenting rtt-target v0.3.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.10s
[INFO] running `Command { std: "docker" "inspect" "ac4bead26c8c52c655b3f50d52277ff7f4bd03e0b7d38bd3ffea91178666b917", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ac4bead26c8c52c655b3f50d52277ff7f4bd03e0b7d38bd3ffea91178666b917", kill_on_drop: false }`
[INFO] [stdout] ac4bead26c8c52c655b3f50d52277ff7f4bd03e0b7d38bd3ffea91178666b917