[INFO] crate rtl-sdr 0.1.5 is already in cache
[INFO] checking rtl-sdr-0.1.5 against master#fdc0011561c6365c596dfd8fa1ef388162bc89c7 for pr-66504-1
[INFO] extracting crate rtl-sdr 0.1.5 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate rtl-sdr 0.1.5 on toolchain fdc0011561c6365c596dfd8fa1ef388162bc89c7
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate rtl-sdr 0.1.5
[INFO] finished tweaking crates.io crate rtl-sdr 0.1.5
[INFO] tweaked toml for crates.io crate rtl-sdr 0.1.5 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr] warning: file found to be present in multiple build targets: /workspace/builds/worker-1/source/examples/ex1.rs
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+fdc0011561c6365c596dfd8fa1ef388162bc89c7" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 4eda123798400b438c33703946969c172d888be48887a6f6a5167788c2fb2fe2
[INFO] running `"docker" "start" "-a" "4eda123798400b438c33703946969c172d888be48887a6f6a5167788c2fb2fe2"`
[INFO] [stderr] warning: file found to be present in multiple build targets: /opt/rustwide/workdir/examples/ex1.rs
[INFO] [stderr]     Checking rtl-sdr v0.1.5 (/opt/rustwide/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> examples/ex1.rs:11:19
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let (m, p, s, mut err) = dev.get_usb_strings();
[INFO] [stderr]    |                   ----^^^
[INFO] [stderr]    |                   |
[INFO] [stderr]    |                   help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> examples/ex1.rs:20:10
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let (mut hw_info, mut err) = dev.get_hw_info();
[INFO] [stderr]    |          ----^^^^^^^
[INFO] [stderr]    |          |
[INFO] [stderr]    |          help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> examples/ex1.rs:11:19
[INFO] [stderr]    |
[INFO] [stderr] 11 |     let (m, p, s, mut err) = dev.get_usb_strings();
[INFO] [stderr]    |                   ----^^^
[INFO] [stderr]    |                   |
[INFO] [stderr]    |                   help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> examples/ex1.rs:20:10
[INFO] [stderr]    |
[INFO] [stderr] 20 |     let (mut hw_info, mut err) = dev.get_hw_info();
[INFO] [stderr]    |          ----^^^^^^^
[INFO] [stderr]    |          |
[INFO] [stderr]    |          help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.00s
[INFO] running `"docker" "inspect" "4eda123798400b438c33703946969c172d888be48887a6f6a5167788c2fb2fe2"`
[INFO] running `"docker" "rm" "-f" "4eda123798400b438c33703946969c172d888be48887a6f6a5167788c2fb2fe2"`
[INFO] [stdout] 4eda123798400b438c33703946969c172d888be48887a6f6a5167788c2fb2fe2