[INFO] fetching crate measureme 9.1.2...
[INFO] building measureme-9.1.2 against master#d5c88c22807925c189328ef9d923c5d2b11a95b8 for pr-87066-3
[INFO] extracting crate measureme 9.1.2 into /workspace/builds/worker-46/source
[INFO] validating manifest of crates.io crate measureme 9.1.2 on toolchain d5c88c22807925c189328ef9d923c5d2b11a95b8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate measureme 9.1.2
[INFO] finished tweaking crates.io crate measureme 9.1.2
[INFO] tweaked toml for crates.io crate measureme 9.1.2 written to /workspace/builds/worker-46/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded perf-event-open-sys v1.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b70e910e333fc8e54084bb6f34ba2fde39f60a40d5e4d4cc96171f8a99526873
[INFO] running `Command { std: "docker" "start" "-a" "b70e910e333fc8e54084bb6f34ba2fde39f60a40d5e4d4cc96171f8a99526873", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b70e910e333fc8e54084bb6f34ba2fde39f60a40d5e4d4cc96171f8a99526873", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b70e910e333fc8e54084bb6f34ba2fde39f60a40d5e4d4cc96171f8a99526873", kill_on_drop: false }`
[INFO] [stdout] b70e910e333fc8e54084bb6f34ba2fde39f60a40d5e4d4cc96171f8a99526873
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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" "+d5c88c22807925c189328ef9d923c5d2b11a95b8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 58e67bec0b0f1ad06f6ae08eac511c151bf5ad67f28ebe99215b5a6d247d0077
[INFO] running `Command { std: "docker" "start" "-a" "58e67bec0b0f1ad06f6ae08eac511c151bf5ad67f28ebe99215b5a6d247d0077", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling smallvec v1.6.1
[INFO] [stderr]    Compiling rustc-hash v1.1.0
[INFO] [stderr]    Compiling instant v0.1.10
[INFO] [stderr]    Compiling lock_api v0.4.4
[INFO] [stderr]    Compiling perf-event-open-sys v1.0.1
[INFO] [stderr]    Compiling memmap2 v0.2.3
[INFO] [stderr]    Compiling parking_lot_core v0.8.3
[INFO] [stderr]    Compiling parking_lot v0.11.1
[INFO] [stderr]    Compiling measureme v9.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] error: unused borrow that must be used
[INFO] [stdout]    --> src/stringtable.rs:189:17
[INFO] [stdout]     |
[INFO] [stdout] 189 |                 &mut bytes[1..5].copy_from_slice(&string_id.0.to_le_bytes());
[INFO] [stdout]     |                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout] note: the lint level is defined here
[INFO] [stdout]    --> src/lib.rs:36:9
[INFO] [stdout]     |
[INFO] [stdout] 36  | #![deny(warnings)]
[INFO] [stdout]     |         ^^^^^^^^
[INFO] [stdout]     = note: `#[deny(unused_must_use)]` implied by `#[deny(warnings)]`
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 189 |                 let _ = &mut bytes[1..5].copy_from_slice(&string_id.0.to_le_bytes());
[INFO] [stdout]     |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `measureme` due to 2 previous errors
[INFO] running `Command { std: "docker" "inspect" "58e67bec0b0f1ad06f6ae08eac511c151bf5ad67f28ebe99215b5a6d247d0077", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58e67bec0b0f1ad06f6ae08eac511c151bf5ad67f28ebe99215b5a6d247d0077", kill_on_drop: false }`
[INFO] [stdout] 58e67bec0b0f1ad06f6ae08eac511c151bf5ad67f28ebe99215b5a6d247d0077