[INFO] fetching crate updb 0.1.0...
[INFO] building updb-0.1.0 against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2
[INFO] extracting crate updb 0.1.0 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate updb 0.1.0
[INFO] finished tweaking crates.io crate updb 0.1.0
[INFO] tweaked toml for crates.io crate updb 0.1.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate updb 0.1.0 on toolchain c7f6aa2869acdbf014d094c6e427e554e160b6db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 42 packages to latest compatible versions
[INFO] [stderr]       Adding imbl v2.0.3 (available: v6.1.0)
[INFO] [stderr]       Adding thiserror v1.0.69 (available: v2.0.17)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bitmaps v3.2.1
[INFO] [stderr]   Downloaded imbl-sized-chunks v0.1.3
[INFO] [stderr]   Downloaded imbl v2.0.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ea41fd7aec68f8b729fadd239d8c6bb40cb6d1c38446b75f31419302c0d01d71
[INFO] running `Command { std: "docker" "start" "-a" "ea41fd7aec68f8b729fadd239d8c6bb40cb6d1c38446b75f31419302c0d01d71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ea41fd7aec68f8b729fadd239d8c6bb40cb6d1c38446b75f31419302c0d01d71", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea41fd7aec68f8b729fadd239d8c6bb40cb6d1c38446b75f31419302c0d01d71", kill_on_drop: false }`
[INFO] [stdout] ea41fd7aec68f8b729fadd239d8c6bb40cb6d1c38446b75f31419302c0d01d71
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 719aae651320c789c206e0ab008674b963f5f6276be3046d96e1b7037c016b99
[INFO] running `Command { std: "docker" "start" "-a" "719aae651320c789c206e0ab008674b963f5f6276be3046d96e1b7037c016b99", kill_on_drop: false }`
[INFO] [stderr]    Compiling bitmaps v3.2.1
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling arc-swap v1.7.1
[INFO] [stderr]    Compiling tokio v1.47.1
[INFO] [stderr]    Compiling rand_xoshiro v0.6.0
[INFO] [stderr]    Compiling imbl-sized-chunks v0.1.3
[INFO] [stderr]    Compiling imbl v2.0.3
[INFO] [stderr]    Compiling updb v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/tx/mod.rs:50:13
[INFO] [stdout]    |
[INFO] [stdout] 50 |             drop(lock);
[INFO] [stdout]    |             ^^^^^----^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  argument has type `&OwnedMutexGuard<()>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 50 -             drop(lock);
[INFO] [stdout] 50 +             let _ = lock;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/tx/mod.rs:70:13
[INFO] [stdout]    |
[INFO] [stdout] 70 |             drop(lock);
[INFO] [stdout]    |             ^^^^^----^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  argument has type `&OwnedMutexGuard<()>`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 70 -             drop(lock);
[INFO] [stdout] 70 +             let _ = lock;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.66s
[INFO] running `Command { std: "docker" "inspect" "719aae651320c789c206e0ab008674b963f5f6276be3046d96e1b7037c016b99", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "719aae651320c789c206e0ab008674b963f5f6276be3046d96e1b7037c016b99", kill_on_drop: false }`
[INFO] [stdout] 719aae651320c789c206e0ab008674b963f5f6276be3046d96e1b7037c016b99
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e11d3b1e112d6c61c83d272992c4659b13e90a8643755d9df4b6d728f20044be
[INFO] running `Command { std: "docker" "start" "-a" "e11d3b1e112d6c61c83d272992c4659b13e90a8643755d9df4b6d728f20044be", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v2.0.106
[INFO] [stderr]    Compiling thiserror-impl v1.0.69
[INFO] [stderr]    Compiling tokio-macros v2.5.0
[INFO] [stderr]    Compiling tokio v1.47.1
[INFO] [stderr]    Compiling thiserror v1.0.69
[INFO] [stderr]    Compiling updb v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/tx/mod.rs:50:13
[INFO] [stdout]    |
[INFO] [stdout] 50 |             drop(lock);
[INFO] [stdout]    |             ^^^^^----^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  argument has type `&OwnedMutexGuard<()>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 50 -             drop(lock);
[INFO] [stdout] 50 +             let _ = lock;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/tx/mod.rs:70:13
[INFO] [stdout]    |
[INFO] [stdout] 70 |             drop(lock);
[INFO] [stdout]    |             ^^^^^----^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  argument has type `&OwnedMutexGuard<()>`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 70 -             drop(lock);
[INFO] [stdout] 70 +             let _ = lock;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/tx/mod.rs:50:13
[INFO] [stdout]    |
[INFO] [stdout] 50 |             drop(lock);
[INFO] [stdout]    |             ^^^^^----^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  argument has type `&OwnedMutexGuard<()>`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dropping_references)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 50 -             drop(lock);
[INFO] [stdout] 50 +             let _ = lock;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: calls to `std::mem::drop` with a reference instead of an owned value does nothing
[INFO] [stdout]   --> src/tx/mod.rs:70:13
[INFO] [stdout]    |
[INFO] [stdout] 70 |             drop(lock);
[INFO] [stdout]    |             ^^^^^----^
[INFO] [stdout]    |                  |
[INFO] [stdout]    |                  argument has type `&OwnedMutexGuard<()>`
[INFO] [stdout]    |
[INFO] [stdout] help: use `let _ = ...` to ignore the expression or result
[INFO] [stdout]    |
[INFO] [stdout] 70 -             drop(lock);
[INFO] [stdout] 70 +             let _ = lock;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 7.50s
[INFO] running `Command { std: "docker" "inspect" "e11d3b1e112d6c61c83d272992c4659b13e90a8643755d9df4b6d728f20044be", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e11d3b1e112d6c61c83d272992c4659b13e90a8643755d9df4b6d728f20044be", kill_on_drop: false }`
[INFO] [stdout] e11d3b1e112d6c61c83d272992c4659b13e90a8643755d9df4b6d728f20044be