[INFO] fetching crate ffi_helpers 0.3.0...
[INFO] documenting ffi_helpers-0.3.0 against try#6fd27704e643b25711e6a97ec2b04873b411b97d for pr-96676
[INFO] extracting crate ffi_helpers 0.3.0 into /workspace/builds/worker-104/source
[INFO] validating manifest of crates.io crate ffi_helpers 0.3.0 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 ffi_helpers 0.3.0
[INFO] finished tweaking crates.io crate ffi_helpers 0.3.0
[INFO] tweaked toml for crates.io crate ffi_helpers 0.3.0 written to /workspace/builds/worker-104/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] running `Command { std: "/workspace/cargo-home/bin/cargo" "+6fd27704e643b25711e6a97ec2b04873b411b97d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/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] 679a7f557d0d8bf5758ed8e10b1cdeeae03d9bd8c3f20eb3bc9d758ed89c2da4
[INFO] running `Command { std: "docker" "start" "-a" "679a7f557d0d8bf5758ed8e10b1cdeeae03d9bd8c3f20eb3bc9d758ed89c2da4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "679a7f557d0d8bf5758ed8e10b1cdeeae03d9bd8c3f20eb3bc9d758ed89c2da4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "679a7f557d0d8bf5758ed8e10b1cdeeae03d9bd8c3f20eb3bc9d758ed89c2da4", kill_on_drop: false }`
[INFO] [stdout] 679a7f557d0d8bf5758ed8e10b1cdeeae03d9bd8c3f20eb3bc9d758ed89c2da4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-104/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] d3723474c4d29372948b5d238f15bdc2e71837b551263a960cfb026025922f66
[INFO] running `Command { std: "docker" "start" "-a" "d3723474c4d29372948b5d238f15bdc2e71837b551263a960cfb026025922f66", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.37
[INFO] [stderr]    Compiling unicode-xid v0.2.3
[INFO] [stderr]    Compiling syn v1.0.92
[INFO] [stderr]    Compiling anyhow v1.0.57
[INFO] [stderr]    Compiling libc v0.2.125
[INFO] [stderr]    Compiling quote v1.0.18
[INFO] [stderr]    Compiling thiserror-impl v1.0.31
[INFO] [stderr]     Checking thiserror v1.0.31
[INFO] [stderr]  Documenting ffi_helpers v0.3.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not document `ffi_helpers`
[INFO] [stdout] error: macro_rules fallback is used during doc link resolution
[INFO] [stdout]    --> src/nullable.rs:111:11
[INFO] [stdout]     |
[INFO] [stdout] 111 | /// The [`null_pointer_check!()`] macro accepts a second argument to allow this.
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[deny(rustdoc::macro_rules_fallback)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2021 --crate-type lib --crate-name ffi_helpers src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=bd5835c50a42aa45 -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-0d130518d8a3e086.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-d5d6a57393ac9164.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-ed27afbe577b5dc4.rmeta --cap-lints=forbid --crate-version 0.3.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "d3723474c4d29372948b5d238f15bdc2e71837b551263a960cfb026025922f66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d3723474c4d29372948b5d238f15bdc2e71837b551263a960cfb026025922f66", kill_on_drop: false }`
[INFO] [stdout] d3723474c4d29372948b5d238f15bdc2e71837b551263a960cfb026025922f66