[INFO] fetching crate mqttrs2 0.1.0...
[INFO] checking mqttrs2-0.1.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate mqttrs2 0.1.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate mqttrs2 0.1.0
[INFO] finished tweaking crates.io crate mqttrs2 0.1.0
[INFO] tweaked toml for crates.io crate mqttrs2 0.1.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mqttrs2 0.1.0 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 mqttrs2 0.1.0 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] 25509f0d390e414d5ad05b325491d71c8e8aa7db4ca933f6a520c11336ff7fcc
[INFO] running `Command { std: "docker" "start" "-a" "25509f0d390e414d5ad05b325491d71c8e8aa7db4ca933f6a520c11336ff7fcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "25509f0d390e414d5ad05b325491d71c8e8aa7db4ca933f6a520c11336ff7fcc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25509f0d390e414d5ad05b325491d71c8e8aa7db4ca933f6a520c11336ff7fcc", kill_on_drop: false }`
[INFO] [stdout] 25509f0d390e414d5ad05b325491d71c8e8aa7db4ca933f6a520c11336ff7fcc
[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] 7c3862422174340f66810ab147d1f411acbed8984f3202a03ac01999cd31c4a6
[INFO] running `Command { std: "docker" "start" "-a" "7c3862422174340f66810ab147d1f411acbed8984f3202a03ac01999cd31c4a6", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustix v1.0.8
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]    Compiling heapless v0.8.0
[INFO] [stderr]     Checking once_cell v1.21.3
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]     Checking bit-vec v0.6.3
[INFO] [stderr]     Checking stable_deref_trait v1.2.0
[INFO] [stderr]     Checking bytes v1.10.1
[INFO] [stderr]     Checking getrandom v0.1.16
[INFO] [stderr]     Checking getrandom v0.3.3
[INFO] [stderr]     Checking wait-timeout v0.2.1
[INFO] [stderr]    Compiling num-traits v0.2.19
[INFO] [stderr]    Compiling syn v2.0.104
[INFO] [stderr]     Checking bit-set v0.5.3
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_xorshift v0.2.0
[INFO] [stderr]     Checking hash32 v0.3.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking tempfile v3.20.0
[INFO] [stderr]     Checking rusty-fork v0.3.0
[INFO] [stderr]     Checking proptest v0.10.1
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]     Checking mqttrs2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/connect.rs:35:45
[INFO] [stdout]    |
[INFO] [stdout] 35 |             _ => Err(Error::InvalidProtocol(String::from_str(name).unwrap(), 0)),
[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]   --> src/subscribe.rs:34:26
[INFO] [stdout]    |
[INFO] [stdout] 34 |         let topic_path = LimitedString::from_str(read_str(buf, offset)?).unwrap();
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/subscribe.rs:167:36
[INFO] [stdout]     |
[INFO] [stdout] 167 |             let _res = topics.push(LimitedString::from_str(read_str(buf, offset)?).unwrap());
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mqttrs2` (lib) due to 3 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/connect.rs:35:45
[INFO] [stdout]    |
[INFO] [stdout] 35 |             _ => Err(Error::InvalidProtocol(String::from_str(name).unwrap(), 0)),
[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]   --> src/subscribe.rs:34:26
[INFO] [stdout]    |
[INFO] [stdout] 34 |         let topic_path = LimitedString::from_str(read_str(buf, offset)?).unwrap();
[INFO] [stdout]    |                          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/subscribe.rs:167:36
[INFO] [stdout]     |
[INFO] [stdout] 167 |             let _res = topics.push(LimitedString::from_str(read_str(buf, offset)?).unwrap());
[INFO] [stdout]     |                                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mqttrs2` (lib test) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "7c3862422174340f66810ab147d1f411acbed8984f3202a03ac01999cd31c4a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7c3862422174340f66810ab147d1f411acbed8984f3202a03ac01999cd31c4a6", kill_on_drop: false }`
[INFO] [stdout] 7c3862422174340f66810ab147d1f411acbed8984f3202a03ac01999cd31c4a6