[INFO] fetching crate tracelet-core 0.1.4...
[INFO] testing tracelet-core-0.1.4 against 1.99.0-beta.8 for beta-1.100-2
[INFO] extracting crate tracelet-core 0.1.4 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate tracelet-core 0.1.4
[INFO] finished tweaking crates.io crate tracelet-core 0.1.4
[INFO] tweaked toml for crates.io crate tracelet-core 0.1.4 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate tracelet-core 0.1.4 on toolchain 1.99.0-beta.8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate crates.io crate tracelet-core 0.1.4 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" "+1.99.0-beta.8" "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-6-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3111399a4047eeb3a02b7a90e478d715f38a8c6669b5c4b49d30a17385265909" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 03e0f466c3c3f32606c685ff9439ea9f38ed61dcb842d47e00c05c50c2f742f6
[INFO] running `Command { std: "docker" "start" "03e0f466c3c3f32606c685ff9439ea9f38ed61dcb842d47e00c05c50c2f742f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "03e0f466c3c3f32606c685ff9439ea9f38ed61dcb842d47e00c05c50c2f742f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "03e0f466c3c3f32606c685ff9439ea9f38ed61dcb842d47e00c05c50c2f742f6" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "03e0f466c3c3f32606c685ff9439ea9f38ed61dcb842d47e00c05c50c2f742f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "03e0f466c3c3f32606c685ff9439ea9f38ed61dcb842d47e00c05c50c2f742f6" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling tracelet-core v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "03e0f466c3c3f32606c685ff9439ea9f38ed61dcb842d47e00c05c50c2f742f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "03e0f466c3c3f32606c685ff9439ea9f38ed61dcb842d47e00c05c50c2f742f6" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]    Compiling tracelet-core v0.1.4 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.59s
[INFO] running `Command { std: "docker" "inspect" "03e0f466c3c3f32606c685ff9439ea9f38ed61dcb842d47e00c05c50c2f742f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "03e0f466c3c3f32606c685ff9439ea9f38ed61dcb842d47e00c05c50c2f742f6" "/opt/rustwide/cargo-home/bin/cargo" "+1.99.0-beta.8" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/tracelet_core-35c76b2cc7d0fdc2)
[INFO] [stdout] 
[INFO] [stdout] running 13 tests
[INFO] [stdout] test context::tests::nests_correctly ... ok
[INFO] [stdout] test propagation::tests::round_trips_sampled ... ok
[INFO] [stdout] test tests::trace_id_high_and_low_halves_both_vary ... ok
[INFO] [stdout] test propagation::tests::round_trips_not_sampled ... ok
[INFO] [stdout] test sampling::tests::ratio_zero_never_samples ... ok
[INFO] [stdout] test tests::drain_empties_buffer ... ok
[INFO] [stdout] test context::tests::reflects_updates_made_after_push ... ok
[INFO] [stdout] test sampling::tests::deterministic_for_the_same_trace_id ... ok
[INFO] [stdout] test tests::drops_oldest_on_overflow ... ok
[INFO] [stdout] test sampling::tests::ratio_one_always_samples ... ok
[INFO] [stdout] test propagation::tests::rejects_malformed_headers ... ok
[INFO] [stdout] test tests::trace_id_and_span_id_do_not_collide_in_a_burst ... ok
[INFO] [stdout] test sampling::tests::roughly_matches_the_configured_ratio ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 13 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.08s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests tracelet_core
[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" "03e0f466c3c3f32606c685ff9439ea9f38ed61dcb842d47e00c05c50c2f742f6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03e0f466c3c3f32606c685ff9439ea9f38ed61dcb842d47e00c05c50c2f742f6", kill_on_drop: false }`
[INFO] [stdout] 03e0f466c3c3f32606c685ff9439ea9f38ed61dcb842d47e00c05c50c2f742f6
