[INFO] fetching crate netstack-smoltcp 0.2.0...
[INFO] checking netstack-smoltcp-0.2.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate netstack-smoltcp 0.2.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate netstack-smoltcp 0.2.0
[INFO] removed 0 missing examples
[INFO] finished tweaking crates.io crate netstack-smoltcp 0.2.0
[INFO] tweaked toml for crates.io crate netstack-smoltcp 0.2.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate netstack-smoltcp 0.2.0 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 netstack-smoltcp 0.2.0 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] b0be5e83afa35b693540f03223d50edc97124ad228da7de48a5ae45427711efb
[INFO] running `Command { std: "docker" "start" "-a" "b0be5e83afa35b693540f03223d50edc97124ad228da7de48a5ae45427711efb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b0be5e83afa35b693540f03223d50edc97124ad228da7de48a5ae45427711efb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b0be5e83afa35b693540f03223d50edc97124ad228da7de48a5ae45427711efb", kill_on_drop: false }`
[INFO] [stdout] b0be5e83afa35b693540f03223d50edc97124ad228da7de48a5ae45427711efb
[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] 78ee24828507c8f3acc0addc9220487351a591fb4d69ae8dadc0bf1ce6e1e743
[INFO] running `Command { std: "docker" "start" "-a" "78ee24828507c8f3acc0addc9220487351a591fb4d69ae8dadc0bf1ce6e1e743", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.97
[INFO] [stderr]    Compiling libc v0.2.175
[INFO] [stderr]     Checking cfg-if v1.0.1
[INFO] [stderr]     Checking futures-channel v0.3.31
[INFO] [stderr]    Compiling heapless v0.8.0
[INFO] [stderr]    Compiling nix v0.29.0
[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]     Checking tracing v0.1.41
[INFO] [stderr]     Checking ansi_term v0.12.1
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking vec_map v0.8.2
[INFO] [stderr]     Checking managed v0.8.0
[INFO] [stderr]     Checking bitflags v2.9.1
[INFO] [stderr]     Checking arrayvec v0.7.6
[INFO] [stderr]     Checking thread_local v1.1.9
[INFO] [stderr]     Checking spin v0.9.8
[INFO] [stderr]     Checking tracing-log v0.2.0
[INFO] [stderr]     Checking tracing-subscriber v0.3.19
[INFO] [stderr]     Checking etherparse v0.16.0
[INFO] [stderr]    Compiling quote v1.0.40
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]     Checking mio v1.0.4
[INFO] [stderr]     Checking getrandom v0.2.16
[INFO] [stderr]     Checking socket2 v0.6.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking socket2 v0.5.10
[INFO] [stderr]     Checking clap v2.34.0
[INFO] [stderr]     Checking rand_core v0.6.4
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking socket2-ext v0.1.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking tokio v1.47.1
[INFO] [stderr]    Compiling structopt-derive v0.4.18
[INFO] [stderr]     Checking futures-util v0.3.31
[INFO] [stderr]     Checking thiserror v1.0.69
[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 v0.7.16
[INFO] [stderr]     Checking tun2 v3.1.8
[INFO] [stderr]     Checking netstack-smoltcp v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> examples/forward.rs:38:5
[INFO] [stdout]    |
[INFO] [stdout] 38 | /     /// Default binding interface, default by guessed.
[INFO] [stdout] 39 | |     /// Specify but doesn't exist, no device is bound.
[INFO] [stdout] 40 | |     #[structopt(short = "i", long = "interface")]
[INFO] [stdout] 41 | |     interface: 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<std::string::String, Infallible>
[INFO] [stdout]   --> examples/forward.rs:43:5
[INFO] [stdout]    |
[INFO] [stdout] 43 | /     /// name of the tun device, default to rtun8.
[INFO] [stdout] 44 | |     #[structopt(short = "n", long = "name", default_value = "utun8")]
[INFO] [stdout] 45 | |     name: String,
[INFO] [stdout]    | |________________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `netstack-smoltcp` (example "forward") due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "78ee24828507c8f3acc0addc9220487351a591fb4d69ae8dadc0bf1ce6e1e743", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "78ee24828507c8f3acc0addc9220487351a591fb4d69ae8dadc0bf1ce6e1e743", kill_on_drop: false }`
[INFO] [stdout] 78ee24828507c8f3acc0addc9220487351a591fb4d69ae8dadc0bf1ce6e1e743