[INFO] fetching crate async-backtrace-attributes 0.2.7...
[INFO] checking async-backtrace-attributes-0.2.7 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate async-backtrace-attributes 0.2.7 into /workspace/builds/worker-0-tc1/source
[INFO] started tweaking crates.io crate async-backtrace-attributes 0.2.7
[INFO] finished tweaking crates.io crate async-backtrace-attributes 0.2.7
[INFO] tweaked toml for crates.io crate async-backtrace-attributes 0.2.7 written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate async-backtrace-attributes 0.2.7 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]      Locking 4 packages to latest compatible versions
[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] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] de204deb1073a5105faddc10c4f1b945eebc120036950e7d08e04cee3a077756
[INFO] running `Command { std: "docker" "start" "-a" "de204deb1073a5105faddc10c4f1b945eebc120036950e7d08e04cee3a077756", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "de204deb1073a5105faddc10c4f1b945eebc120036950e7d08e04cee3a077756", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de204deb1073a5105faddc10c4f1b945eebc120036950e7d08e04cee3a077756", kill_on_drop: false }`
[INFO] [stdout] de204deb1073a5105faddc10c4f1b945eebc120036950e7d08e04cee3a077756
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 44fcc6daa56737ed25646c393f271deba38430a53ecd2960badb3968ee380c8b
[INFO] running `Command { std: "docker" "start" "-a" "44fcc6daa56737ed25646c393f271deba38430a53ecd2960badb3968ee380c8b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.95
[INFO] [stderr]     Checking unicode-ident v1.0.18
[INFO] [stderr]     Checking quote v1.0.40
[INFO] [stderr]     Checking syn v2.0.104
[INFO] [stderr]     Checking async-backtrace-attributes v0.2.7 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `IdentAndTypesRenamer` is never constructed
[INFO] [stdout]    --> src/expand.rs:368:8
[INFO] [stdout]     |
[INFO] [stdout] 368 | struct IdentAndTypesRenamer<'a> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `AsyncTraitBlockReplacer` is never constructed
[INFO] [stdout]    --> src/expand.rs:397:8
[INFO] [stdout]     |
[INFO] [stdout] 397 | struct AsyncTraitBlockReplacer<'a> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `IdentAndTypesRenamer` is never constructed
[INFO] [stdout]    --> src/expand.rs:368:8
[INFO] [stdout]     |
[INFO] [stdout] 368 | struct IdentAndTypesRenamer<'a> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `AsyncTraitBlockReplacer` is never constructed
[INFO] [stdout]    --> src/expand.rs:397:8
[INFO] [stdout]     |
[INFO] [stdout] 397 | struct AsyncTraitBlockReplacer<'a> {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.83s
[INFO] running `Command { std: "docker" "inspect" "44fcc6daa56737ed25646c393f271deba38430a53ecd2960badb3968ee380c8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "44fcc6daa56737ed25646c393f271deba38430a53ecd2960badb3968ee380c8b", kill_on_drop: false }`
[INFO] [stdout] 44fcc6daa56737ed25646c393f271deba38430a53ecd2960badb3968ee380c8b