[INFO] fetching crate enum-utility-macros 0.1.0...
[INFO] checking enum-utility-macros-0.1.0 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate enum-utility-macros 0.1.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate enum-utility-macros 0.1.0
[INFO] finished tweaking crates.io crate enum-utility-macros 0.1.0
[INFO] tweaked toml for crates.io crate enum-utility-macros 0.1.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate enum-utility-macros 0.1.0 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 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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] fa18f992cac96aef58306732bd839622a0f76197155ca70ca5dfe8a7560dce30
[INFO] running `Command { std: "docker" "start" "-a" "fa18f992cac96aef58306732bd839622a0f76197155ca70ca5dfe8a7560dce30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fa18f992cac96aef58306732bd839622a0f76197155ca70ca5dfe8a7560dce30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fa18f992cac96aef58306732bd839622a0f76197155ca70ca5dfe8a7560dce30", kill_on_drop: false }`
[INFO] [stdout] fa18f992cac96aef58306732bd839622a0f76197155ca70ca5dfe8a7560dce30
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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] 83c07cdfc6ac6792bf75b3db908345bae4cdd3055afc817a75d52b93db0193a4
[INFO] running `Command { std: "docker" "start" "-a" "83c07cdfc6ac6792bf75b3db908345bae4cdd3055afc817a75d52b93db0193a4", kill_on_drop: false }`
[INFO] [stderr]     Checking syn v2.0.104
[INFO] [stderr]     Checking enum-utility-macros v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `must_use` that must be used
[INFO] [stdout]   --> tests/unnamed_enum_attributes.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     format!("{m1:?} {r1:?}");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `must_use` that must be used
[INFO] [stdout]   --> tests/unnamed_enum_attributes.rs:31:5
[INFO] [stdout]    |
[INFO] [stdout] 31 |     format!("{g1:?}");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this warning originates in the macro `format` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.11s
[INFO] running `Command { std: "docker" "inspect" "83c07cdfc6ac6792bf75b3db908345bae4cdd3055afc817a75d52b93db0193a4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83c07cdfc6ac6792bf75b3db908345bae4cdd3055afc817a75d52b93db0193a4", kill_on_drop: false }`
[INFO] [stdout] 83c07cdfc6ac6792bf75b3db908345bae4cdd3055afc817a75d52b93db0193a4