[INFO] fetching crate uk-trains 0.1.0...
[INFO] checking uk-trains-0.1.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate uk-trains 0.1.0 into /workspace/builds/worker-6-tc2/source
[INFO] started tweaking crates.io crate uk-trains 0.1.0
[INFO] finished tweaking crates.io crate uk-trains 0.1.0
[INFO] tweaked toml for crates.io crate uk-trains 0.1.0 written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate uk-trains 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 uk-trains 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-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] 290b15c09947c1caca7f6a33374976595cd1c5caa5a159d75f427e53dcc6fb39
[INFO] running `Command { std: "docker" "start" "-a" "290b15c09947c1caca7f6a33374976595cd1c5caa5a159d75f427e53dcc6fb39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "290b15c09947c1caca7f6a33374976595cd1c5caa5a159d75f427e53dcc6fb39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "290b15c09947c1caca7f6a33374976595cd1c5caa5a159d75f427e53dcc6fb39", kill_on_drop: false }`
[INFO] [stdout] 290b15c09947c1caca7f6a33374976595cd1c5caa5a159d75f427e53dcc6fb39
[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] 732297ad72e636cd07735a14e0a55b3b95ba7480e183876d35e541ef28d882bf
[INFO] running `Command { std: "docker" "start" "-a" "732297ad72e636cd07735a14e0a55b3b95ba7480e183876d35e541ef28d882bf", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.219
[INFO] [stderr]    Compiling xml-rs v0.8.26
[INFO] [stderr]    Compiling log v0.4.27
[INFO] [stderr]    Compiling syn v2.0.100
[INFO] [stderr]    Compiling serde_derive v1.0.219
[INFO] [stderr]    Compiling serde_tokenstream v0.2.2
[INFO] [stderr]    Compiling yaserde_derive v0.12.0
[INFO] [stderr]     Checking yaserde v0.12.0
[INFO] [stderr]     Checking uk-trains v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error: could not compile `uk-trains` (lib) due to 4 previous errors
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/open_ldbws.rs:22:26
[INFO] [stdout]    |
[INFO] [stdout] 22 | #[derive(Debug, Default, YaDeserialize, YaSerialize)]
[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 `YaDeserialize` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[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/open_ldbws.rs:74:26
[INFO] [stdout]    |
[INFO] [stdout] 74 | #[derive(Debug, Default, YaDeserialize, YaSerialize)]
[INFO] [stdout]    |                          ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the derive macro `YaDeserialize` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/open_ldbws.rs:119:26
[INFO] [stdout]     |
[INFO] [stdout] 119 | #[derive(Debug, Default, YaDeserialize, YaSerialize)]
[INFO] [stdout]     |                          ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the derive macro `YaDeserialize` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/open_ldbws.rs:164:26
[INFO] [stdout]     |
[INFO] [stdout] 164 | #[derive(Debug, Default, YaDeserialize, YaSerialize)]
[INFO] [stdout]     |                          ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the derive macro `YaDeserialize` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/open_ldbws.rs:22:26
[INFO] [stdout]    |
[INFO] [stdout] 22 | #[derive(Debug, Default, YaDeserialize, YaSerialize)]
[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 `YaDeserialize` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]   --> src/open_ldbws.rs:74:26
[INFO] [stdout]    |
[INFO] [stdout] 74 | #[derive(Debug, Default, YaDeserialize, YaSerialize)]
[INFO] [stdout]    |                          ^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this error originates in the derive macro `YaDeserialize` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/open_ldbws.rs:119:26
[INFO] [stdout]     |
[INFO] [stdout] 119 | #[derive(Debug, Default, YaDeserialize, YaSerialize)]
[INFO] [stdout]     |                          ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the derive macro `YaDeserialize` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/open_ldbws.rs:164:26
[INFO] [stdout]     |
[INFO] [stdout] 164 | #[derive(Debug, Default, YaDeserialize, YaSerialize)]
[INFO] [stdout]     |                          ^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: this error originates in the derive macro `YaDeserialize` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `uk-trains` (lib test) due to 4 previous errors
[INFO] running `Command { std: "docker" "inspect" "732297ad72e636cd07735a14e0a55b3b95ba7480e183876d35e541ef28d882bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "732297ad72e636cd07735a14e0a55b3b95ba7480e183876d35e541ef28d882bf", kill_on_drop: false }`
[INFO] [stdout] 732297ad72e636cd07735a14e0a55b3b95ba7480e183876d35e541ef28d882bf