[INFO] fetching crate mvclient 0.3.0...
[INFO] building mvclient-0.3.0 against try#d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6 for pr-146237-1
[INFO] extracting crate mvclient 0.3.0 into /workspace/builds/worker-3-tc2/source
[INFO] started tweaking crates.io crate mvclient 0.3.0
[INFO] finished tweaking crates.io crate mvclient 0.3.0
[INFO] tweaked toml for crates.io crate mvclient 0.3.0 written to /workspace/builds/worker-3-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mvclient 0.3.0 on toolchain d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "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" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 173 packages to latest compatible versions
[INFO] [stderr]       Adding rand v0.8.5 (available: v0.9.2)
[INFO] [stderr]       Adding reqwest v0.11.27 (available: v0.12.23)
[INFO] [stderr]       Adding thiserror v1.0.69 (available: v2.0.16)
[INFO] [stderr]       Adding zstd v0.11.2+zstd.1.5.2 (available: v0.13.3)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 25238b3c60806da3ca1b61fc9b60814f01c6257511c56872ba29a72dd0fd520b
[INFO] running `Command { std: "docker" "start" "-a" "25238b3c60806da3ca1b61fc9b60814f01c6257511c56872ba29a72dd0fd520b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "25238b3c60806da3ca1b61fc9b60814f01c6257511c56872ba29a72dd0fd520b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "25238b3c60806da3ca1b61fc9b60814f01c6257511c56872ba29a72dd0fd520b", kill_on_drop: false }`
[INFO] [stdout] 25238b3c60806da3ca1b61fc9b60814f01c6257511c56872ba29a72dd0fd520b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 60e3c8033b656fbaf7eb0bfda4b99da06e31a14c3e2991207a9bbd7dd89a1b3d
[INFO] running `Command { std: "docker" "start" "-a" "60e3c8033b656fbaf7eb0bfda4b99da06e31a14c3e2991207a9bbd7dd89a1b3d", kill_on_drop: false }`
[INFO] [stderr]    Compiling synstructure v0.13.2
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling zerovec-derive v0.11.1
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]    Compiling displaydoc v0.2.5
[INFO] [stderr]    Compiling jobserver v0.1.34
[INFO] [stderr]    Compiling parking_lot_core v0.9.11
[INFO] [stderr]    Compiling futures-macro v0.3.31
[INFO] [stderr]    Compiling mio v1.0.4
[INFO] [stderr]    Compiling signal-hook-registry v1.4.6
[INFO] [stderr]    Compiling socket2 v0.6.0
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.30
[INFO] [stderr]    Compiling zstd-safe v5.0.2+zstd.1.5.2
[INFO] [stderr]    Compiling socket2 v0.5.10
[INFO] [stderr]    Compiling rmp v0.8.14
[INFO] [stderr]    Compiling cc v1.2.39
[INFO] [stderr]    Compiling encoding_rs v0.8.35
[INFO] [stderr]    Compiling parking_lot v0.12.4
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling zerofrom-derive v0.1.6
[INFO] [stderr]    Compiling yoke-derive v0.8.0
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling futures-util v0.3.31
[INFO] [stderr]    Compiling tracing v0.1.41
[INFO] [stderr]    Compiling serde_json v1.0.145
[INFO] [stderr]    Compiling serde_bytes v0.11.19
[INFO] [stderr]    Compiling zerofrom v0.1.6
[INFO] [stderr]    Compiling zstd-sys v2.0.16+zstd.1.5.7
[INFO] [stderr]    Compiling blake3 v1.8.2
[INFO] [stderr]    Compiling thiserror v1.0.69
[INFO] [stderr]    Compiling yoke v0.8.0
[INFO] [stderr]    Compiling zerovec v0.11.4
[INFO] [stderr]    Compiling zerotrie v0.2.2
[INFO] [stderr]    Compiling tinystr v0.8.1
[INFO] [stderr]    Compiling potential_utf v0.1.3
[INFO] [stderr]    Compiling futures-executor v0.3.31
[INFO] [stderr]    Compiling icu_collections v2.0.0
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling icu_locale_core v2.0.0
[INFO] [stderr]    Compiling futures v0.3.31
[INFO] [stderr]    Compiling bytes v1.10.1
[INFO] [stderr]    Compiling serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling rmp-serde v1.3.0
[INFO] [stderr]    Compiling icu_provider v2.0.0
[INFO] [stderr]    Compiling icu_properties v2.0.1
[INFO] [stderr]    Compiling tokio v1.47.1
[INFO] [stderr]    Compiling http v0.2.12
[INFO] [stderr]    Compiling icu_normalizer v2.0.0
[INFO] [stderr]    Compiling http-body v0.4.6
[INFO] [stderr]    Compiling idna_adapter v1.2.1
[INFO] [stderr]    Compiling idna v1.1.0
[INFO] [stderr]    Compiling url v2.5.7
[INFO] [stderr]    Compiling zstd v0.11.2+zstd.1.5.2
[INFO] [stderr]    Compiling tokio-util v0.7.16
[INFO] [stderr]    Compiling h2 v0.3.27
[INFO] [stderr]    Compiling hyper v0.14.32
[INFO] [stderr]    Compiling reqwest v0.11.27
[INFO] [stderr]    Compiling mvclient v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `tokio::sync::RwLockWriteGuard` that must be used
[INFO] [stdout]    --> src/lib.rs:434:9
[INFO] [stdout]     |
[INFO] [stdout] 434 |         self.async_ctx.background_completion.write().await;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if unused the RwLock will immediately unlock
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 434 |         let _ = self.async_ctx.background_completion.write().await;
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `tokio::sync::RwLockWriteGuard` that must be used
[INFO] [stdout]    --> src/lib.rs:635:9
[INFO] [stdout]     |
[INFO] [stdout] 635 |         self.async_ctx.background_completion.write().await;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if unused the RwLock will immediately unlock
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 635 |         let _ = self.async_ctx.background_completion.write().await;
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 43.37s
[INFO] running `Command { std: "docker" "inspect" "60e3c8033b656fbaf7eb0bfda4b99da06e31a14c3e2991207a9bbd7dd89a1b3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "60e3c8033b656fbaf7eb0bfda4b99da06e31a14c3e2991207a9bbd7dd89a1b3d", kill_on_drop: false }`
[INFO] [stdout] 60e3c8033b656fbaf7eb0bfda4b99da06e31a14c3e2991207a9bbd7dd89a1b3d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+d79d87d4c0f7f0d0785ad6e493cf8cf718ed89a6" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f47414a93fa4584fac5f720daf08eb624b57acc08ed14e751e3c80d300e9390b
[INFO] running `Command { std: "docker" "start" "-a" "f47414a93fa4584fac5f720daf08eb624b57acc08ed14e751e3c80d300e9390b", kill_on_drop: false }`
[INFO] [stdout] warning: unused `tokio::sync::RwLockWriteGuard` that must be used
[INFO] [stdout]    --> src/lib.rs:434:9
[INFO] [stdout]     |
[INFO] [stdout] 434 |         self.async_ctx.background_completion.write().await;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if unused the RwLock will immediately unlock
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 434 |         let _ = self.async_ctx.background_completion.write().await;
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `tokio::sync::RwLockWriteGuard` that must be used
[INFO] [stdout]    --> src/lib.rs:635:9
[INFO] [stdout]     |
[INFO] [stdout] 635 |         self.async_ctx.background_completion.write().await;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if unused the RwLock will immediately unlock
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 635 |         let _ = self.async_ctx.background_completion.write().await;
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling mvclient v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused `tokio::sync::RwLockWriteGuard` that must be used
[INFO] [stdout]    --> src/lib.rs:434:9
[INFO] [stdout]     |
[INFO] [stdout] 434 |         self.async_ctx.background_completion.write().await;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if unused the RwLock will immediately unlock
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 434 |         let _ = self.async_ctx.background_completion.write().await;
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `tokio::sync::RwLockWriteGuard` that must be used
[INFO] [stdout]    --> src/lib.rs:635:9
[INFO] [stdout]     |
[INFO] [stdout] 635 |         self.async_ctx.background_completion.write().await;
[INFO] [stdout]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: if unused the RwLock will immediately unlock
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 635 |         let _ = self.async_ctx.background_completion.write().await;
[INFO] [stdout]     |         +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.37s
[INFO] running `Command { std: "docker" "inspect" "f47414a93fa4584fac5f720daf08eb624b57acc08ed14e751e3c80d300e9390b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f47414a93fa4584fac5f720daf08eb624b57acc08ed14e751e3c80d300e9390b", kill_on_drop: false }`
[INFO] [stdout] f47414a93fa4584fac5f720daf08eb624b57acc08ed14e751e3c80d300e9390b