[INFO] fetching crate tower-async-test 0.2.0...
[INFO] checking tower-async-test-0.2.0 against try#4f260f0f20b3133d20cfb50353c0221943af5796+rustflags=-Dunmustuse_in_always_ok for pr-148577
[INFO] extracting crate tower-async-test 0.2.0 into /workspace/builds/worker-5-tc2/source
[INFO] started tweaking crates.io crate tower-async-test 0.2.0
[INFO] finished tweaking crates.io crate tower-async-test 0.2.0
[INFO] tweaked toml for crates.io crate tower-async-test 0.2.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate tower-async-test 0.2.0 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 9 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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 21a2a2b9b03ebe5b48856fad263e3ed44bc75bee7b5f2c31e0de77b186fcd9d5
[INFO] running `Command { std: "docker" "start" "-a" "21a2a2b9b03ebe5b48856fad263e3ed44bc75bee7b5f2c31e0de77b186fcd9d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "21a2a2b9b03ebe5b48856fad263e3ed44bc75bee7b5f2c31e0de77b186fcd9d5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "21a2a2b9b03ebe5b48856fad263e3ed44bc75bee7b5f2c31e0de77b186fcd9d5", kill_on_drop: false }`
[INFO] [stdout] 21a2a2b9b03ebe5b48856fad263e3ed44bc75bee7b5f2c31e0de77b186fcd9d5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] f266b239ea1d8ccbc48d3c53f0b0dbcfd33b5ec6b279ec3166eea65470414d88
[INFO] running `Command { std: "docker" "start" "-a" "f266b239ea1d8ccbc48d3c53f0b0dbcfd33b5ec6b279ec3166eea65470414d88", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.103
[INFO] [stderr]    Compiling unicode-ident v1.0.22
[INFO] [stderr]    Compiling quote v1.0.42
[INFO] [stderr]     Checking pin-project-lite v0.2.16
[INFO] [stderr]     Checking tower-async-service v0.2.0
[INFO] [stderr]     Checking tower-async-layer v0.2.0
[INFO] [stderr]    Compiling syn v2.0.110
[INFO] [stderr]    Compiling tokio-macros v2.6.0
[INFO] [stderr]     Checking tokio v1.48.0
[INFO] [stderr]     Checking tower-async-test v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/lib.rs:164:87
[INFO] [stdout]     |
[INFO] [stdout] 164 |           async fn call(&self, request: Request) -> Result<Self::Response, Self::Error> {
[INFO] [stdout]     |  _______________________________________________________________________________________^
[INFO] [stdout] 165 | |             Ok(format!(
[INFO] [stdout] 166 | |                 "DebugFmtService: {:?}",
[INFO] [stdout] 167 | |                 self.inner.call(request).await
[INFO] [stdout] 168 | |             ))
[INFO] [stdout] 169 | |         }
[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/lib.rs:164:87
[INFO] [stdout]     |
[INFO] [stdout] 164 |           async fn call(&self, request: Request) -> Result<Self::Response, Self::Error> {
[INFO] [stdout]     |  _______________________________________________________________________________________^
[INFO] [stdout] 165 | |             Ok(format!(
[INFO] [stdout] 166 | |                 "DebugFmtService: {:?}",
[INFO] [stdout] 167 | |                 self.inner.call(request).await
[INFO] [stdout] 168 | |             ))
[INFO] [stdout] 169 | |         }
[INFO] [stdout]     | |_________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: this type will no longer be must used: Result<String, Infallible>
[INFO] [stdout]    --> src/lib.rs:165:13
[INFO] [stdout]     |
[INFO] [stdout] 165 | /             Ok(format!(
[INFO] [stdout] 166 | |                 "DebugFmtService: {:?}",
[INFO] [stdout] 167 | |                 self.inner.call(request).await
[INFO] [stdout] 168 | |             ))
[INFO] [stdout]     | |______________^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `tower-async-test` (lib test) due to 3 previous errors
[INFO] running `Command { std: "docker" "inspect" "f266b239ea1d8ccbc48d3c53f0b0dbcfd33b5ec6b279ec3166eea65470414d88", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f266b239ea1d8ccbc48d3c53f0b0dbcfd33b5ec6b279ec3166eea65470414d88", kill_on_drop: false }`
[INFO] [stdout] f266b239ea1d8ccbc48d3c53f0b0dbcfd33b5ec6b279ec3166eea65470414d88