[INFO] fetching crate expanding_slice_rb 0.1.3...
[INFO] checking expanding_slice_rb-0.1.3 against master#8007b506ac5da629f223b755f5a5391edd5f6d01 for pr-88041
[INFO] extracting crate expanding_slice_rb 0.1.3 into /workspace/builds/worker-100/source
[INFO] validating manifest of crates.io crate expanding_slice_rb 0.1.3 on toolchain 8007b506ac5da629f223b755f5a5391edd5f6d01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate expanding_slice_rb 0.1.3
[INFO] finished tweaking crates.io crate expanding_slice_rb 0.1.3
[INFO] tweaked toml for crates.io crate expanding_slice_rb 0.1.3 written to /workspace/builds/worker-100/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 8fd17ae25afc4063ad8d5c040451e3bdffe18f445e81477f0fdecad4eee60822
[INFO] running `Command { std: "docker" "start" "-a" "8fd17ae25afc4063ad8d5c040451e3bdffe18f445e81477f0fdecad4eee60822", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8fd17ae25afc4063ad8d5c040451e3bdffe18f445e81477f0fdecad4eee60822", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fd17ae25afc4063ad8d5c040451e3bdffe18f445e81477f0fdecad4eee60822", kill_on_drop: false }`
[INFO] [stdout] 8fd17ae25afc4063ad8d5c040451e3bdffe18f445e81477f0fdecad4eee60822
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-100/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" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+8007b506ac5da629f223b755f5a5391edd5f6d01" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b87f9bdc62cb3a4f32b8823d3618a1071723689c15f4881bddbb30f8b122eb85
[INFO] running `Command { std: "docker" "start" "-a" "b87f9bdc62cb3a4f32b8823d3618a1071723689c15f4881bddbb30f8b122eb85", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking slice_ring_buf v0.2.6
[INFO] [stderr]     Checking expanding_slice_rb v0.1.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/lib.rs:389:17
[INFO] [stdout]     |
[INFO] [stdout] 389 |                 &mut dst[start_data_len..start_data_len+additional].copy_from_slice(&src[0..additional]);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 389 |                 let _ = &mut dst[start_data_len..start_data_len+additional].copy_from_slice(&src[0..additional]);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/lib.rs:393:17
[INFO] [stdout]     |
[INFO] [stdout] 393 |                 &mut dst[start_data_len..start_data_len+wrapped_data_len].copy_from_slice(&src[0..wrapped_data_len]);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 393 |                 let _ = &mut dst[start_data_len..start_data_len+wrapped_data_len].copy_from_slice(&src[0..wrapped_data_len]);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/lib.rs:389:17
[INFO] [stdout]     |
[INFO] [stdout] 389 |                 &mut dst[start_data_len..start_data_len+additional].copy_from_slice(&src[0..additional]);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 389 |                 let _ = &mut dst[start_data_len..start_data_len+additional].copy_from_slice(&src[0..additional]);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/lib.rs:393:17
[INFO] [stdout]     |
[INFO] [stdout] 393 |                 &mut dst[start_data_len..start_data_len+wrapped_data_len].copy_from_slice(&src[0..wrapped_data_len]);
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 393 |                 let _ = &mut dst[start_data_len..start_data_len+wrapped_data_len].copy_from_slice(&src[0..wrapped_data_len]);
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.65s
[INFO] running `Command { std: "docker" "inspect" "b87f9bdc62cb3a4f32b8823d3618a1071723689c15f4881bddbb30f8b122eb85", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b87f9bdc62cb3a4f32b8823d3618a1071723689c15f4881bddbb30f8b122eb85", kill_on_drop: false }`
[INFO] [stdout] b87f9bdc62cb3a4f32b8823d3618a1071723689c15f4881bddbb30f8b122eb85