[INFO] fetching crate tokio-smoltcp 0.5.2...
[INFO] checking tokio-smoltcp-0.5.2 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate tokio-smoltcp 0.5.2 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate tokio-smoltcp 0.5.2
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate tokio-smoltcp 0.5.2
[INFO] tweaked toml for crates.io crate tokio-smoltcp 0.5.2 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate tokio-smoltcp 0.5.2 on toolchain 4f260f0f20b3133d20cfb50353c0221943af5796
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate tokio-smoltcp 0.5.2 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" "+4f260f0f20b3133d20cfb50353c0221943af5796" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 51bcf497c53c18e4d29e5aabb51f3bd8b694213cfe249a7b4b4f73343bc6efb4
[INFO] running `Command { std: "docker" "start" "-a" "51bcf497c53c18e4d29e5aabb51f3bd8b694213cfe249a7b4b4f73343bc6efb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51bcf497c53c18e4d29e5aabb51f3bd8b694213cfe249a7b4b4f73343bc6efb4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51bcf497c53c18e4d29e5aabb51f3bd8b694213cfe249a7b4b4f73343bc6efb4", kill_on_drop: false }`
[INFO] [stdout] 51bcf497c53c18e4d29e5aabb51f3bd8b694213cfe249a7b4b4f73343bc6efb4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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 -Dunmustuse_in_always_ok" "-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 351eb4faad99a0fb1587fb78e7e3ea44fa75f23699351a06b3ad637770857e4b
[INFO] running `Command { std: "docker" "start" "-a" "351eb4faad99a0fb1587fb78e7e3ea44fa75f23699351a06b3ad637770857e4b", kill_on_drop: false }`
[INFO] [stderr]     Checking parking_lot_core v0.9.10
[INFO] [stderr]    Compiling heapless v0.8.0
[INFO] [stderr]    Compiling libloading v0.6.7
[INFO] [stderr]     Checking futures-util v0.3.31
[INFO] [stderr]     Checking getrandom v0.3.2
[INFO] [stderr]     Checking hash32 v0.3.1
[INFO] [stderr]    Compiling smoltcp v0.12.0
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking managed v0.8.0
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking rand_core v0.9.3
[INFO] [stderr]    Compiling pcap v1.3.0
[INFO] [stderr]     Checking parking_lot v0.12.3
[INFO] [stderr]     Checking rand_chacha v0.9.0
[INFO] [stderr]     Checking errno v0.2.8
[INFO] [stderr]     Checking tokio v1.44.2
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking dns-parser v0.8.0
[INFO] [stderr]     Checking rand v0.9.1
[INFO] [stderr]     Checking structopt v0.3.26
[INFO] [stderr]     Checking futures-executor v0.3.31
[INFO] [stderr]     Checking futures v0.3.31
[INFO] [stderr]     Checking tokio-util v0.7.15
[INFO] [stderr]     Checking tokio-smoltcp v0.5.2 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> examples/pcap.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     device: String,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> examples/pcap.rs:15:5
[INFO] [stdout]    |
[INFO] [stdout] 15 | /     #[structopt(short, long, default_value = "00:01:02:03:04:05")]
[INFO] [stdout] 16 | |     ethernet_addr: String,
[INFO] [stdout]    | |_________________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> examples/pcap.rs:17:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | /     #[structopt(short, long, default_value = "172.19.44.33/20")]
[INFO] [stdout] 18 | |     ip_addr: String,
[INFO] [stdout]    | |___________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> examples/pcap.rs:19:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | /     #[structopt(short, long, default_value = "172.19.32.1")]
[INFO] [stdout] 20 | |     gateway: String,
[INFO] [stdout]    | |___________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tokio-smoltcp` (example "pcap") due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "351eb4faad99a0fb1587fb78e7e3ea44fa75f23699351a06b3ad637770857e4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "351eb4faad99a0fb1587fb78e7e3ea44fa75f23699351a06b3ad637770857e4b", kill_on_drop: false }`
[INFO] [stdout] 351eb4faad99a0fb1587fb78e7e3ea44fa75f23699351a06b3ad637770857e4b