[INFO] fetching crate dcaf 0.4.0...
[INFO] checking dcaf-0.4.0 against master#cf38b8e663f15db10ce49d7bbce02c99fc3dbc0c for pr-143170
[INFO] extracting crate dcaf 0.4.0 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate dcaf 0.4.0
[INFO] finished tweaking crates.io crate dcaf 0.4.0
[INFO] tweaked toml for crates.io crate dcaf 0.4.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate dcaf 0.4.0 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 35 packages to latest compatible versions
[INFO] [stderr]       Adding base64 v0.13.1 (available: v0.22.1)
[INFO] [stderr]       Adding derive_builder v0.11.2 (available: v0.20.2)
[INFO] [stderr]       Adding erased-serde v0.3.31 (available: v0.4.6)
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.9.1)
[INFO] [stderr]       Adding strum v0.24.1 (available: v0.27.1)
[INFO] [stderr]       Adding strum_macros v0.24.3 (available: v0.27.1)
[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-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 6c874346b67302c657c8a6b0a4971375ee1bf3e4173d84753d735dfeeb8b4b66
[INFO] running `Command { std: "docker" "start" "-a" "6c874346b67302c657c8a6b0a4971375ee1bf3e4173d84753d735dfeeb8b4b66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "6c874346b67302c657c8a6b0a4971375ee1bf3e4173d84753d735dfeeb8b4b66", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6c874346b67302c657c8a6b0a4971375ee1bf3e4173d84753d735dfeeb8b4b66", kill_on_drop: false }`
[INFO] [stdout] 6c874346b67302c657c8a6b0a4971375ee1bf3e4173d84753d735dfeeb8b4b66
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 048c34df234837d86892a7f2e6533ec6538b42298ce0db8b3497e2b4004525e4
[INFO] running `Command { std: "docker" "start" "-a" "048c34df234837d86892a7f2e6533ec6538b42298ce0db8b3497e2b4004525e4", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling strsim v0.10.0
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling rustversion v1.0.21
[INFO] [stderr]     Checking half v2.6.0
[INFO] [stderr]     Checking ciborium-io v0.2.2
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking base64 v0.13.1
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking ciborium-ll v0.2.2
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling enumflags2_derive v0.7.12
[INFO] [stderr]     Checking enumflags2 v0.7.12
[INFO] [stderr]    Compiling darling_core v0.14.4
[INFO] [stderr]    Compiling strum_macros v0.24.3
[INFO] [stderr]     Checking strum v0.24.1
[INFO] [stderr]    Compiling darling_macro v0.14.4
[INFO] [stderr]    Compiling darling v0.14.4
[INFO] [stderr]    Compiling derive_builder_core v0.11.2
[INFO] [stderr]    Compiling derive_builder_macro v0.11.2
[INFO] [stderr]     Checking derive_builder v0.11.2
[INFO] [stderr]     Checking ciborium v0.2.2
[INFO] [stderr]     Checking serde_bytes v0.11.17
[INFO] [stderr]     Checking erased-serde v0.3.31
[INFO] [stderr]     Checking coset v0.3.8
[INFO] [stderr]     Checking dcaf v0.4.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: `#[must_use]` has no effect when applied to a provided trait method
[INFO] [stdout]    --> src/error/mod.rs:539:5
[INFO] [stdout]     |
[INFO] [stdout] 539 |     #[must_use]
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` has no effect when applied to a provided trait method
[INFO] [stdout]    --> src/error/mod.rs:549:5
[INFO] [stdout]     |
[INFO] [stdout] 549 |     #[must_use]
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` has no effect when applied to a provided trait method
[INFO] [stdout]    --> src/error/mod.rs:539:5
[INFO] [stdout]     |
[INFO] [stdout] 539 |     #[must_use]
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_attributes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `#[must_use]` has no effect when applied to a provided trait method
[INFO] [stdout]    --> src/error/mod.rs:549:5
[INFO] [stdout]     |
[INFO] [stdout] 549 |     #[must_use]
[INFO] [stdout]     |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 10.52s
[INFO] running `Command { std: "docker" "inspect" "048c34df234837d86892a7f2e6533ec6538b42298ce0db8b3497e2b4004525e4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "048c34df234837d86892a7f2e6533ec6538b42298ce0db8b3497e2b4004525e4", kill_on_drop: false }`
[INFO] [stdout] 048c34df234837d86892a7f2e6533ec6538b42298ce0db8b3497e2b4004525e4