[INFO] fetching crate ouroboros_macro 0.18.5...
[INFO] checking ouroboros_macro-0.18.5 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate ouroboros_macro 0.18.5 into /workspace/builds/worker-7-tc1/source
[INFO] started tweaking crates.io crate ouroboros_macro 0.18.5
[INFO] finished tweaking crates.io crate ouroboros_macro 0.18.5
[INFO] tweaked toml for crates.io crate ouroboros_macro 0.18.5 written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate ouroboros_macro 0.18.5 on toolchain cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 8 packages to latest compatible versions
[INFO] [stderr]       Adding heck v0.4.1 (available: v0.5.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b0752786ef056a07f7d4c9f383c1cf0ed38aea92abe176da55d0e261209d1148
[INFO] running `Command { std: "docker" "start" "-a" "b0752786ef056a07f7d4c9f383c1cf0ed38aea92abe176da55d0e261209d1148", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b0752786ef056a07f7d4c9f383c1cf0ed38aea92abe176da55d0e261209d1148", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0752786ef056a07f7d4c9f383c1cf0ed38aea92abe176da55d0e261209d1148", kill_on_drop: false }`
[INFO] [stdout] b0752786ef056a07f7d4c9f383c1cf0ed38aea92abe176da55d0e261209d1148
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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=forbid" "-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 63d31248d73323b8e385f4f3e0fd9034584c454924822d4e01f2ebb31125c941
[INFO] running `Command { std: "docker" "start" "-a" "63d31248d73323b8e385f4f3e0fd9034584c454924822d4e01f2ebb31125c941", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2-diagnostics v0.10.1
[INFO] [stderr]     Checking syn v2.0.104
[INFO] [stderr]     Checking yansi v1.0.1
[INFO] [stderr]     Checking heck v0.4.1
[INFO] [stderr]     Checking ouroboros_macro v0.18.5 (/opt/rustwide/workdir)
[INFO] [stdout] warning: enum `ProcessingError` is never used
[INFO] [stdout]  --> src/generate/with_each.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub enum ProcessingError {
[INFO] [stdout]   |          ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `attributes` is never read
[INFO] [stdout]   --> src/info_structures.rs:77:9
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub struct StructInfo {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 77 |     pub attributes: Vec<Attribute>,
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `StructInfo` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ProcessingError` is never used
[INFO] [stdout]  --> src/generate/with_each.rs:7:10
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub enum ProcessingError {
[INFO] [stdout]   |          ^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `attributes` is never read
[INFO] [stdout]   --> src/info_structures.rs:77:9
[INFO] [stdout]    |
[INFO] [stdout] 69 | pub struct StructInfo {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 77 |     pub attributes: Vec<Attribute>,
[INFO] [stdout]    |         ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `StructInfo` has a derived impl for the trait `Clone`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.15s
[INFO] running `Command { std: "docker" "inspect" "63d31248d73323b8e385f4f3e0fd9034584c454924822d4e01f2ebb31125c941", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "63d31248d73323b8e385f4f3e0fd9034584c454924822d4e01f2ebb31125c941", kill_on_drop: false }`
[INFO] [stdout] 63d31248d73323b8e385f4f3e0fd9034584c454924822d4e01f2ebb31125c941