[INFO] fetching crate mqtt_macro 0.1.0...
[INFO] checking mqtt_macro-0.1.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate mqtt_macro 0.1.0 into /workspace/builds/worker-1-tc2/source
[INFO] started tweaking crates.io crate mqtt_macro 0.1.0
[INFO] finished tweaking crates.io crate mqtt_macro 0.1.0
[INFO] tweaked toml for crates.io crate mqtt_macro 0.1.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mqtt_macro 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] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4f260f0f20b3133d20cfb50353c0221943af5796" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 24 packages to latest compatible versions
[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-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] 53d6942dead19d15b052b72fbf182efcabaddaa9b9bc7051ecb5cedb19d242d9
[INFO] running `Command { std: "docker" "start" "-a" "53d6942dead19d15b052b72fbf182efcabaddaa9b9bc7051ecb5cedb19d242d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "53d6942dead19d15b052b72fbf182efcabaddaa9b9bc7051ecb5cedb19d242d9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "53d6942dead19d15b052b72fbf182efcabaddaa9b9bc7051ecb5cedb19d242d9", kill_on_drop: false }`
[INFO] [stdout] 53d6942dead19d15b052b72fbf182efcabaddaa9b9bc7051ecb5cedb19d242d9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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] ec77c08c35216da31bfc36ca13a2b3d62e5cbfecf82e332dff7971c0717a238d
[INFO] running `Command { std: "docker" "start" "-a" "ec77c08c35216da31bfc36ca13a2b3d62e5cbfecf82e332dff7971c0717a238d", kill_on_drop: false }`
[INFO] [stderr]    Compiling toml_datetime v0.6.11
[INFO] [stderr]    Compiling winnow v0.5.40
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling syn v2.0.110
[INFO] [stderr]     Checking memchr v2.7.6
[INFO] [stderr]     Checking serde_json v1.0.145
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling toml_edit v0.19.15
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling proc-macro-crate v1.3.1
[INFO] [stderr]    Compiling mqtt-procmacro v1.0.0
[INFO] [stderr]     Checking serde v1.0.228
[INFO] [stderr]     Checking mqtt_macro v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `MqttUpdate::*`
[INFO] [stdout]   --> src/tests.rs:91:9
[INFO] [stdout]    |
[INFO] [stdout] 91 |     use MqttUpdate::*;
[INFO] [stdout]    |         ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]  --> src/tests.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[derive(MqttItem, Debug, PartialEq, Clone)]
[INFO] [stdout]   |          ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]   = note: this error originates in the derive macro `MqttItem` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mqtt_macro` (lib test) due to 1 previous error; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: enum `MqttUpdate` is never used
[INFO] [stdout]  --> src/tests.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 6 | enum MqttUpdate {
[INFO] [stdout]   |      ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `zero_bytes_option_deser` is never used
[INFO] [stdout]   --> src/tests.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub fn zero_bytes_option_deser<'a, T>(payload: &'a [u8]) -> Result<Option<T>, MqttDeserializeError>
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `zero_bytes_option_ser` is never used
[INFO] [stdout]   --> src/tests.rs:55:8
[INFO] [stdout]    |
[INFO] [stdout] 55 | pub fn zero_bytes_option_ser<T>(
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<std::string::String, Infallible>
[INFO] [stdout]  --> src/tests.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 | #[derive(MqttItem, Debug, PartialEq, Clone)]
[INFO] [stdout]   |          ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: requested on the command line with `-D unmustuse-in-always-ok`
[INFO] [stdout]   = note: this error originates in the derive macro `MqttItem` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mqtt_macro` (lib) due to 1 previous error; 3 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "ec77c08c35216da31bfc36ca13a2b3d62e5cbfecf82e332dff7971c0717a238d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ec77c08c35216da31bfc36ca13a2b3d62e5cbfecf82e332dff7971c0717a238d", kill_on_drop: false }`
[INFO] [stdout] ec77c08c35216da31bfc36ca13a2b3d62e5cbfecf82e332dff7971c0717a238d