[INFO] fetching crate metrics-tracing-context 0.8.0...
[INFO] testing metrics-tracing-context-0.8.0 against 1.55.0 for beta-1.56-1
[INFO] extracting crate metrics-tracing-context 0.8.0 into /workspace/builds/worker-40/source
[INFO] validating manifest of crates.io crate metrics-tracing-context 0.8.0 on toolchain 1.55.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate metrics-tracing-context 0.8.0
[INFO] finished tweaking crates.io crate metrics-tracing-context 0.8.0
[INFO] tweaked toml for crates.io crate metrics-tracing-context 0.8.0 written to /workspace/builds/worker-40/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.55.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c226b76051e725a31a2cd7132488107bf4b4a74d25e5640d227b3e5cb2d16f59
[INFO] running `Command { std: "docker" "start" "-a" "c226b76051e725a31a2cd7132488107bf4b4a74d25e5640d227b3e5cb2d16f59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c226b76051e725a31a2cd7132488107bf4b4a74d25e5640d227b3e5cb2d16f59", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c226b76051e725a31a2cd7132488107bf4b4a74d25e5640d227b3e5cb2d16f59", kill_on_drop: false }`
[INFO] [stdout] c226b76051e725a31a2cd7132488107bf4b4a74d25e5640d227b3e5cb2d16f59
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b4e17bc0427cd6c044a45e926fa00eefcbb0905a4baf6805d99d56f3ff3c258a
[INFO] running `Command { std: "docker" "start" "-a" "b4e17bc0427cd6c044a45e926fa00eefcbb0905a4baf6805d99d56f3ff3c258a", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling cfg-if v1.0.0
[INFO] [stderr]    Compiling libc v0.2.101
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.29
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling once_cell v1.8.0
[INFO] [stderr]    Compiling syn v1.0.76
[INFO] [stderr]    Compiling version_check v0.9.3
[INFO] [stderr]    Compiling regex-syntax v0.6.25
[INFO] [stderr]    Compiling smallvec v1.6.1
[INFO] [stderr]    Compiling serde v1.0.130
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling serde_json v1.0.67
[INFO] [stderr]    Compiling bitflags v1.3.2
[INFO] [stderr]    Compiling metrics v0.17.0
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling endian-type v0.1.2
[INFO] [stderr]    Compiling pin-project-lite v0.2.7
[INFO] [stderr]    Compiling atomic-shim v0.1.0
[INFO] [stderr]    Compiling itoa v0.4.8
[INFO] [stderr]    Compiling ansi_term v0.12.1
[INFO] [stderr]    Compiling sketches-ddsketch v0.1.2
[INFO] [stderr]    Compiling lockfree-object-pool v0.1.3
[INFO] [stderr]    Compiling instant v0.1.10
[INFO] [stderr]    Compiling tracing-core v0.1.19
[INFO] [stderr]    Compiling sharded-slab v0.1.3
[INFO] [stderr]    Compiling lock_api v0.4.5
[INFO] [stderr]    Compiling raw-cpuid v9.1.1
[INFO] [stderr]    Compiling thread_local v1.1.3
[INFO] [stderr]    Compiling nibble_vec v0.1.0
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling radix_trie v0.2.1
[INFO] [stderr]    Compiling tracing-log v0.1.2
[INFO] [stderr]    Compiling ahash v0.7.4
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling getrandom v0.2.3
[INFO] [stderr]    Compiling num_cpus v1.13.0
[INFO] [stderr]    Compiling quanta v0.7.2
[INFO] [stderr]    Compiling aho-corasick v0.7.18
[INFO] [stderr]    Compiling dashmap v4.0.2
[INFO] [stderr]    Compiling parking_lot v0.11.2
[INFO] [stderr]    Compiling regex-automata v0.1.10
[INFO] [stderr]    Compiling hashbrown v0.11.2
[INFO] [stderr]    Compiling regex v1.5.4
[INFO] [stderr]    Compiling ordered-float v2.8.0
[INFO] [stderr]    Compiling matchers v0.0.1
[INFO] [stderr]    Compiling chrono v0.4.19
[INFO] [stderr]    Compiling tracing-serde v0.1.2
[INFO] [stderr]    Compiling metrics-macros v0.4.0
[INFO] [stderr]    Compiling tracing-attributes v0.1.15
[INFO] [stderr]    Compiling metrics-util v0.10.0
[INFO] [stderr]    Compiling tracing v0.1.26
[INFO] [stderr]    Compiling tracing-subscriber v0.2.20
[INFO] [stderr]    Compiling metrics-tracing-context v0.8.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 23.21s
[INFO] running `Command { std: "docker" "inspect" "b4e17bc0427cd6c044a45e926fa00eefcbb0905a4baf6805d99d56f3ff3c258a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b4e17bc0427cd6c044a45e926fa00eefcbb0905a4baf6805d99d56f3ff3c258a", kill_on_drop: false }`
[INFO] [stdout] b4e17bc0427cd6c044a45e926fa00eefcbb0905a4baf6805d99d56f3ff3c258a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8bc90dfd2cdab9d398507a28b7835699af13a81e369a93bc999847a6dd87cffe
[INFO] running `Command { std: "docker" "start" "-a" "8bc90dfd2cdab9d398507a28b7835699af13a81e369a93bc999847a6dd87cffe", kill_on_drop: false }`
[INFO] [stderr]    Compiling semver v1.0.4
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling plotters-backend v0.3.2
[INFO] [stderr]    Compiling unicode-width v0.1.8
[INFO] [stderr]    Compiling serde_derive v1.0.130
[INFO] [stderr]    Compiling half v1.7.1
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling oorandom v11.1.3
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]    Compiling crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling bstr v0.2.16
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling atty v0.2.14
[INFO] [stderr]    Compiling tinytemplate v1.2.1
[INFO] [stderr]    Compiling crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling walkdir v2.3.2
[INFO] [stderr]    Compiling serde_cbor v0.11.2
[INFO] [stderr]    Compiling plotters-svg v0.3.1
[INFO] [stderr]    Compiling itertools v0.10.1
[INFO] [stderr]    Compiling clap v2.33.3
[INFO] [stderr]    Compiling plotters v0.3.1
[INFO] [stderr]    Compiling csv v1.1.6
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stderr]    Compiling criterion-plot v0.4.4
[INFO] [stderr]    Compiling criterion v0.3.5
[INFO] [stderr]    Compiling metrics-tracing-context v0.8.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 20.13s
[INFO] running `Command { std: "docker" "inspect" "8bc90dfd2cdab9d398507a28b7835699af13a81e369a93bc999847a6dd87cffe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8bc90dfd2cdab9d398507a28b7835699af13a81e369a93bc999847a6dd87cffe", kill_on_drop: false }`
[INFO] [stdout] 8bc90dfd2cdab9d398507a28b7835699af13a81e369a93bc999847a6dd87cffe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-40/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" "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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+1.55.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 2374669b3fc967080a5f2d09c9af6bee4f3c6f94c9e0fbcffc18bce3f36445bf
[INFO] running `Command { std: "docker" "start" "-a" "2374669b3fc967080a5f2d09c9af6bee4f3c6f94c9e0fbcffc18bce3f36445bf", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.17s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/metrics_tracing_context-7249fa38c22688a3)
[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]      Running tests/integration.rs (/opt/rustwide/target/debug/deps/integration-c44863f1f1ce0ac5)
[INFO] [stdout] 
[INFO] [stdout] running 6 tests
[INFO] [stdout] test test_basic_functionality ... ok
[INFO] [stdout] test test_label_filtering ... ok
[INFO] [stdout] test test_nested_spans ... ok
[INFO] [stdout] test test_multiple_paths_to_the_same_callsite ... ok
[INFO] [stdout] test test_macro_forms ... ok
[INFO] [stdout] test test_no_labels ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 6 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.06s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests metrics-tracing-context
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test src/lib.rs - (line 11) ... ok
[INFO] [stdout] test src/lib.rs - (line 31) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 2.55s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "2374669b3fc967080a5f2d09c9af6bee4f3c6f94c9e0fbcffc18bce3f36445bf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2374669b3fc967080a5f2d09c9af6bee4f3c6f94c9e0fbcffc18bce3f36445bf", kill_on_drop: false }`
[INFO] [stdout] 2374669b3fc967080a5f2d09c9af6bee4f3c6f94c9e0fbcffc18bce3f36445bf