[INFO] fetching crate rconn 1.0.0-a2...
[INFO] checking rconn-1.0.0-a2 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate rconn 1.0.0-a2 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate rconn 1.0.0-a2
[INFO] finished tweaking crates.io crate rconn 1.0.0-a2
[INFO] tweaked toml for crates.io crate rconn 1.0.0-a2 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate rconn 1.0.0-a2 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 rconn 1.0.0-a2 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-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 5a518d5ea5902db71d53e32cf4733c637b61aa68cdb7cf07c4254b0e3e6d25ad
[INFO] running `Command { std: "docker" "start" "-a" "5a518d5ea5902db71d53e32cf4733c637b61aa68cdb7cf07c4254b0e3e6d25ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5a518d5ea5902db71d53e32cf4733c637b61aa68cdb7cf07c4254b0e3e6d25ad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5a518d5ea5902db71d53e32cf4733c637b61aa68cdb7cf07c4254b0e3e6d25ad", kill_on_drop: false }`
[INFO] [stdout] 5a518d5ea5902db71d53e32cf4733c637b61aa68cdb7cf07c4254b0e3e6d25ad
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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] 934714ee23e4231320fb14565f1641f15822619db110e9a584ae00fde09d4032
[INFO] running `Command { std: "docker" "start" "-a" "934714ee23e4231320fb14565f1641f15822619db110e9a584ae00fde09d4032", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.171
[INFO] [stderr]     Checking smallvec v1.14.0
[INFO] [stderr]     Checking inout v0.1.4
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]     Checking digest v0.10.7
[INFO] [stderr]     Checking serde v1.0.219
[INFO] [stderr]     Checking cipher v0.4.4
[INFO] [stderr]     Checking sha2 v0.10.8
[INFO] [stderr]     Checking aes v0.8.4
[INFO] [stderr]     Checking getrandom v0.3.2
[INFO] [stderr]     Checking parking_lot_core v0.9.10
[INFO] [stderr]     Checking socket2 v0.5.9
[INFO] [stderr]     Checking mio v1.0.3
[INFO] [stderr]     Checking signal-hook-registry v1.4.2
[INFO] [stderr]     Checking rand_core v0.9.3
[INFO] [stderr]     Checking parking_lot v0.12.3
[INFO] [stderr]     Checking rand_chacha v0.9.0
[INFO] [stderr]     Checking tokio v1.44.1
[INFO] [stderr]     Checking rand v0.9.0
[INFO] [stderr]     Checking serde_json v1.0.140
[INFO] [stderr]     Checking rconn v1.0.0-a2 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/client.rs:77:18
[INFO] [stdout]    |
[INFO] [stdout] 77 |             act: String::from_str(act).unwrap(),
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Test` is never constructed
[INFO] [stdout]  --> src/tests/client.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Test;
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rconn` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]   --> src/client.rs:77:18
[INFO] [stdout]    |
[INFO] [stdout] 77 |             act: String::from_str(act).unwrap(),
[INFO] [stdout]    |                  ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rconn` (lib test) due to 1 previous error; 1 warning emitted
[INFO] running `Command { std: "docker" "inspect" "934714ee23e4231320fb14565f1641f15822619db110e9a584ae00fde09d4032", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "934714ee23e4231320fb14565f1641f15822619db110e9a584ae00fde09d4032", kill_on_drop: false }`
[INFO] [stdout] 934714ee23e4231320fb14565f1641f15822619db110e9a584ae00fde09d4032