[INFO] fetching crate rfm9x 0.1.2...
[INFO] checking rfm9x-0.1.2 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate rfm9x 0.1.2 into /workspace/builds/worker-3-tc2/source
[INFO] validating manifest of crates.io crate rfm9x 0.1.2 on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] removed /workspace/builds/worker-3-tc2/source/.cargo/config
[INFO] started tweaking crates.io crate rfm9x 0.1.2
[INFO] finished tweaking crates.io crate rfm9x 0.1.2
[INFO] tweaked toml for crates.io crate rfm9x 0.1.2 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] crate crates.io crate rfm9x 0.1.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 5bc5ad9c2de18dc57c7003406257621421e6504a3386c0b6c10391057c1599a8
[INFO] running `Command { std: "docker" "start" "-a" "5bc5ad9c2de18dc57c7003406257621421e6504a3386c0b6c10391057c1599a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5bc5ad9c2de18dc57c7003406257621421e6504a3386c0b6c10391057c1599a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5bc5ad9c2de18dc57c7003406257621421e6504a3386c0b6c10391057c1599a8", kill_on_drop: false }`
[INFO] [stdout] 5bc5ad9c2de18dc57c7003406257621421e6504a3386c0b6c10391057c1599a8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/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 -Dtail_expr_drop_order" "-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3e5bd0166040de36e9a05baa0b813b42798559b6147df107117dde0bd9e461c7
[INFO] running `Command { std: "docker" "start" "-a" "3e5bd0166040de36e9a05baa0b813b42798559b6147df107117dde0bd9e461c7", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling getrandom v0.1.13
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]     Checking c2-chacha v0.2.3
[INFO] [stderr]     Checking rppal v0.11.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]     Checking rfm9x v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `old_mode`, `new_mode`, and `set_mode` are never read
[INFO] [stdout]    --> src/rfm95.rs:196:2
[INFO] [stdout]     |
[INFO] [stdout] 195 | pub struct ModeChangeFailedErrorInfo {
[INFO] [stdout]     |            ------------------------- fields in this struct
[INFO] [stdout] 196 |     old_mode: u8,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 197 |     new_mode: Mode,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 198 |     set_mode: u8
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ModeChangeFailedErrorInfo` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `old_mode`, `new_mode`, and `set_mode` are never read
[INFO] [stdout]    --> src/rfm95.rs:196:2
[INFO] [stdout]     |
[INFO] [stdout] 195 | pub struct ModeChangeFailedErrorInfo {
[INFO] [stdout]     |            ------------------------- fields in this struct
[INFO] [stdout] 196 |     old_mode: u8,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 197 |     new_mode: Mode,
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 198 |     set_mode: u8
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `ModeChangeFailedErrorInfo` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.17s
[INFO] running `Command { std: "docker" "inspect" "3e5bd0166040de36e9a05baa0b813b42798559b6147df107117dde0bd9e461c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3e5bd0166040de36e9a05baa0b813b42798559b6147df107117dde0bd9e461c7", kill_on_drop: false }`
[INFO] [stdout] 3e5bd0166040de36e9a05baa0b813b42798559b6147df107117dde0bd9e461c7