[INFO] fetching crate viaduct 0.4.0...
[INFO] checking viaduct-0.4.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate viaduct 0.4.0 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate viaduct 0.4.0
[INFO] finished tweaking crates.io crate viaduct 0.4.0
[INFO] tweaked toml for crates.io crate viaduct 0.4.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate viaduct 0.4.0 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 viaduct 0.4.0 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] cc77926f171015c82d8fbcd6db15c2bdab88ee49fb3c2ab922c1a83c3870fe90
[INFO] running `Command { std: "docker" "start" "-a" "cc77926f171015c82d8fbcd6db15c2bdab88ee49fb3c2ab922c1a83c3870fe90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cc77926f171015c82d8fbcd6db15c2bdab88ee49fb3c2ab922c1a83c3870fe90", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc77926f171015c82d8fbcd6db15c2bdab88ee49fb3c2ab922c1a83c3870fe90", kill_on_drop: false }`
[INFO] [stdout] cc77926f171015c82d8fbcd6db15c2bdab88ee49fb3c2ab922c1a83c3870fe90
[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] 9ac6f85795ffcd88307a90a26448fd94290845076d28972f271a3278c675a09f
[INFO] running `Command { std: "docker" "start" "-a" "9ac6f85795ffcd88307a90a26448fd94290845076d28972f271a3278c675a09f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.127
[INFO] [stderr]    Compiling syn v1.0.99
[INFO] [stderr]    Compiling serde_derive v1.0.142
[INFO] [stderr]    Compiling serde v1.0.142
[INFO] [stderr]     Checking bytemuck v1.11.0
[INFO] [stderr]     Checking getrandom v0.2.7
[INFO] [stderr]     Checking parking_lot_core v0.9.3
[INFO] [stderr]     Checking interprocess v1.1.1
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking uuid v1.1.2
[INFO] [stderr]     Checking parking_lot v0.12.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking viaduct v0.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stdout] warning: unexpected `cfg` condition name: `ci_test`
[INFO] [stdout]    --> src/lib.rs:139:13
[INFO] [stdout]     |
[INFO] [stdout] 139 | #![cfg_attr(ci_test, deny(warnings))]
[INFO] [stdout]     |             ^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: expected names are: `docsrs`, `feature`, and `test` and 31 more
[INFO] [stdout]     = help: consider using a Cargo feature instead
[INFO] [stdout]     = help: or consider adding in `Cargo.toml` the `check-cfg` lint config for the lint:
[INFO] [stdout]              [lints.rust]
[INFO] [stdout]              unexpected_cfgs = { level = "warn", check-cfg = ['cfg(ci_test)'] }
[INFO] [stdout]     = help: or consider adding `println!("cargo::rustc-check-cfg=cfg(ci_test)");` to the top of the `build.rs`
[INFO] [stdout]     = note: see <https://doc.rust-lang.org/nightly/rustc/check-cfg/cargo-specifics.html> for more information about checking conditional configuration
[INFO] [stdout]     = note: `#[warn(unexpected_cfgs)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<doctest::Result<T, E>, Infallible>
[INFO] [stdout]   --> src/doctest.rs:39:75
[INFO] [stdout]    |
[INFO] [stdout] 39 |       fn from_pipeable(bytes: &[u8]) -> std::result::Result<Self, Self::Error> {
[INFO] [stdout]    |  ______________________________________________________________________________^
[INFO] [stdout] 40 | |         unimplemented!()
[INFO] [stdout] 41 | |     }
[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: std::result::Result<FrontflipError, Infallible>
[INFO] [stdout]   --> src/doctest.rs:58:75
[INFO] [stdout]    |
[INFO] [stdout] 58 |       fn from_pipeable(bytes: &[u8]) -> std::result::Result<Self, Self::Error> {
[INFO] [stdout]    |  ______________________________________________________________________________^
[INFO] [stdout] 59 | |         unimplemented!()
[INFO] [stdout] 60 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<BackflipError, Infallible>
[INFO] [stdout]   --> src/doctest.rs:77:75
[INFO] [stdout]    |
[INFO] [stdout] 77 |       fn from_pipeable(bytes: &[u8]) -> std::result::Result<Self, Self::Error> {
[INFO] [stdout]    |  ______________________________________________________________________________^
[INFO] [stdout] 78 | |         unimplemented!()
[INFO] [stdout] 79 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<ExampleRpc, Infallible>
[INFO] [stdout]   --> src/doctest.rs:94:75
[INFO] [stdout]    |
[INFO] [stdout] 94 |       fn from_pipeable(bytes: &[u8]) -> std::result::Result<Self, Self::Error> {
[INFO] [stdout]    |  ______________________________________________________________________________^
[INFO] [stdout] 95 | |         unimplemented!()
[INFO] [stdout] 96 | |     }
[INFO] [stdout]    | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: std::result::Result<ExampleRequest, Infallible>
[INFO] [stdout]    --> src/doctest.rs:111:75
[INFO] [stdout]     |
[INFO] [stdout] 111 |       fn from_pipeable(bytes: &[u8]) -> std::result::Result<Self, Self::Error> {
[INFO] [stdout]     |  ______________________________________________________________________________^
[INFO] [stdout] 112 | |         unimplemented!()
[INFO] [stdout] 113 | |     }
[INFO] [stdout]     | |_____^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `viaduct` (lib) due to 5 previous errors; 1 warning emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "9ac6f85795ffcd88307a90a26448fd94290845076d28972f271a3278c675a09f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9ac6f85795ffcd88307a90a26448fd94290845076d28972f271a3278c675a09f", kill_on_drop: false }`
[INFO] [stdout] 9ac6f85795ffcd88307a90a26448fd94290845076d28972f271a3278c675a09f
