[INFO] fetching crate starchart-backends 0.2.0...
[INFO] testing starchart-backends-0.2.0 against beta-2026-04-21 for beta-1.96-2
[INFO] extracting crate starchart-backends 0.2.0 into /workspace/builds/worker-0-tc2/source
[INFO] started tweaking crates.io crate starchart-backends 0.2.0
[INFO] finished tweaking crates.io crate starchart-backends 0.2.0
[INFO] tweaked toml for crates.io crate starchart-backends 0.2.0 written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate starchart-backends 0.2.0 on toolchain beta-2026-04-21
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "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" "+beta-2026-04-21" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 60 packages to latest compatible versions
[INFO] [stderr]       Adding bincode v1.3.3 (available: v3.0.0)
[INFO] [stderr]       Adding dashmap v5.5.3 (available: v6.1.0)
[INFO] [stderr]       Adding serde_yaml v0.8.26 (available: v0.9.34+deprecated)
[INFO] [stderr]       Adding toml v0.5.11 (available: v1.1.2+spec-1.1.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2026-04-21" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] e52701e4f049db2530275cc95885c9283f53bf2096a9f991de5c59722c566d1b
[INFO] running `Command { std: "docker" "start" "-a" "e52701e4f049db2530275cc95885c9283f53bf2096a9f991de5c59722c566d1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "e52701e4f049db2530275cc95885c9283f53bf2096a9f991de5c59722c566d1b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e52701e4f049db2530275cc95885c9283f53bf2096a9f991de5c59722c566d1b", kill_on_drop: false }`
[INFO] [stdout] e52701e4f049db2530275cc95885c9283f53bf2096a9f991de5c59722c566d1b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] aeea851e0beb1891a5b7888a5f213ef2448338f6aabe625d08a0cf9264c8ae20
[INFO] running `Command { std: "docker" "start" "-a" "aeea851e0beb1891a5b7888a5f213ef2448338f6aabe625d08a0cf9264c8ae20", kill_on_drop: false }`
[INFO] [stderr]    Compiling parking_lot_core v0.8.6
[INFO] [stderr]    Compiling starchart v0.19.0
[INFO] [stderr]    Compiling futures-executor v0.3.32
[INFO] [stderr]    Compiling starchart-backends v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling parking_lot v0.11.2
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.90s
[INFO] running `Command { std: "docker" "inspect" "aeea851e0beb1891a5b7888a5f213ef2448338f6aabe625d08a0cf9264c8ae20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aeea851e0beb1891a5b7888a5f213ef2448338f6aabe625d08a0cf9264c8ae20", kill_on_drop: false }`
[INFO] [stdout] aeea851e0beb1891a5b7888a5f213ef2448338f6aabe625d08a0cf9264c8ae20
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 55d261311522904b469406c54f33da3c37651ec3f199ed9bd6fb6b6f39f11464
[INFO] running `Command { std: "docker" "start" "-a" "55d261311522904b469406c54f33da3c37651ec3f199ed9bd6fb6b6f39f11464", kill_on_drop: false }`
[INFO] [stderr]    Compiling tokio-macros v2.7.0
[INFO] [stderr]    Compiling parking_lot_core v0.9.12
[INFO] [stderr]    Compiling parking_lot v0.12.5
[INFO] [stderr]    Compiling tokio v1.52.1
[INFO] [stderr]    Compiling starchart-backends v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: struct `TestSettings` is never constructed
[INFO] [stdout]   --> src/testing.rs:54:12
[INFO] [stdout]    |
[INFO] [stdout] 54 | pub struct TestSettings {
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 5.84s
[INFO] running `Command { std: "docker" "inspect" "55d261311522904b469406c54f33da3c37651ec3f199ed9bd6fb6b6f39f11464", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "55d261311522904b469406c54f33da3c37651ec3f199ed9bd6fb6b6f39f11464", kill_on_drop: false }`
[INFO] [stdout] 55d261311522904b469406c54f33da3c37651ec3f199ed9bd6fb6b6f39f11464
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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=warn" "-e" "RUSTDOCFLAGS=--cap-lints=warn" "-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2026-04-21" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 5b0d693523fc239541301af7a69923f4becbab50edb2340244c933236401a378
[INFO] running `Command { std: "docker" "start" "-a" "5b0d693523fc239541301af7a69923f4becbab50edb2340244c933236401a378", kill_on_drop: false }`
[INFO] [stderr] warning: struct `TestSettings` is never constructed
[INFO] [stderr]   --> src/testing.rs:54:12
[INFO] [stderr]    |
[INFO] [stderr] 54 | pub struct TestSettings {
[INFO] [stderr]    |            ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `starchart-backends` (lib test) generated 1 warning
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.11s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/starchart_backends-82b0b9317d5592dd)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests starchart_backends
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "5b0d693523fc239541301af7a69923f4becbab50edb2340244c933236401a378", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5b0d693523fc239541301af7a69923f4becbab50edb2340244c933236401a378", kill_on_drop: false }`
[INFO] [stdout] 5b0d693523fc239541301af7a69923f4becbab50edb2340244c933236401a378
