[INFO] fetching crate opentracing-rs-core 0.1.0...
[INFO] testing opentracing-rs-core-0.1.0 against 1.91.0 for beta-1.92-2
[INFO] extracting crate opentracing-rs-core 0.1.0 into /workspace/builds/worker-6-tc1/source
[INFO] started tweaking crates.io crate opentracing-rs-core 0.1.0
[INFO] finished tweaking crates.io crate opentracing-rs-core 0.1.0
[INFO] tweaked toml for crates.io crate opentracing-rs-core 0.1.0 written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate opentracing-rs-core 0.1.0 on toolchain 1.91.0
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "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" "+1.91.0" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 56 packages to latest compatible versions
[INFO] [stderr]       Adding futures v0.1.31 (available: v0.3.31)
[INFO] [stderr]       Adding tokio v0.1.22 (available: v1.48.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1.91.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7175ba9997812f88b3f3076ab63649b84e87b97bf1d1a844d387bb7980fcf8e5
[INFO] running `Command { std: "docker" "start" "-a" "7175ba9997812f88b3f3076ab63649b84e87b97bf1d1a844d387bb7980fcf8e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7175ba9997812f88b3f3076ab63649b84e87b97bf1d1a844d387bb7980fcf8e5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7175ba9997812f88b3f3076ab63649b84e87b97bf1d1a844d387bb7980fcf8e5", kill_on_drop: false }`
[INFO] [stdout] 7175ba9997812f88b3f3076ab63649b84e87b97bf1d1a844d387bb7980fcf8e5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 58aea7c45264a6c05a44a5cec6be8c8aea35baba9408f1fadd51092c3fd8db20
[INFO] running `Command { std: "docker" "start" "-a" "58aea7c45264a6c05a44a5cec6be8c8aea35baba9408f1fadd51092c3fd8db20", kill_on_drop: false }`
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling futures v0.1.31
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling memoffset v0.5.6
[INFO] [stderr]    Compiling lock_api v0.3.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling iovec v0.1.4
[INFO] [stderr]    Compiling num_cpus v1.17.0
[INFO] [stderr]    Compiling net2 v0.2.39
[INFO] [stderr]    Compiling bytes v0.4.12
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling smallvec v0.6.14
[INFO] [stderr]    Compiling mio v0.6.23
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling parking_lot_core v0.6.3
[INFO] [stderr]    Compiling parking_lot v0.9.0
[INFO] [stderr]    Compiling crossbeam-queue v0.2.3
[INFO] [stderr]    Compiling crossbeam-deque v0.7.4
[INFO] [stderr]    Compiling mio-uds v0.6.8
[INFO] [stderr]    Compiling tokio-executor v0.1.10
[INFO] [stderr]    Compiling tokio-io v0.1.13
[INFO] [stderr]    Compiling tokio-sync v0.1.8
[INFO] [stderr]    Compiling tokio-threadpool v0.1.18
[INFO] [stderr]    Compiling tokio-timer v0.2.13
[INFO] [stderr]    Compiling tokio-current-thread v0.1.7
[INFO] [stderr]    Compiling tokio-codec v0.1.2
[INFO] [stderr]    Compiling tokio-reactor v0.1.12
[INFO] [stderr]    Compiling tokio-fs v0.1.7
[INFO] [stderr]    Compiling tokio-udp v0.1.6
[INFO] [stderr]    Compiling tokio-tcp v0.1.4
[INFO] [stderr]    Compiling tokio-uds v0.2.7
[INFO] [stderr]    Compiling tokio v0.1.22
[INFO] [stderr]    Compiling opentracing-rs-core v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `start_time` and `references` are never read
[INFO] [stdout]    --> src/span.rs:115:5
[INFO] [stdout]     |
[INFO] [stdout] 109 | struct Inner<S>
[INFO] [stdout]     |        ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 115 |     start_time: SystemTime,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 118 |     references: Vec<SpanReference<S>>,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Inner` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `key` and `value` are never read
[INFO] [stdout]    --> src/span.rs:147:5
[INFO] [stdout]     |
[INFO] [stdout] 146 | pub struct BaggageItem {
[INFO] [stdout]     |            ----------- fields in this struct
[INFO] [stdout] 147 |     key: String,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 148 |     value: String,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `BaggageItem` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `value` are never read
[INFO] [stdout]  --> src/tag.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct Tag {
[INFO] [stdout]   |            --- fields in this struct
[INFO] [stdout] 3 |     name: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 4 |     value: TagValue,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Tag` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.32s
[INFO] running `Command { std: "docker" "inspect" "58aea7c45264a6c05a44a5cec6be8c8aea35baba9408f1fadd51092c3fd8db20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58aea7c45264a6c05a44a5cec6be8c8aea35baba9408f1fadd51092c3fd8db20", kill_on_drop: false }`
[INFO] [stdout] 58aea7c45264a6c05a44a5cec6be8c8aea35baba9408f1fadd51092c3fd8db20
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ee9afb08a31efcd3082d9a1788a7dbeaca9365bd9bd1442faeb9267bffecfb46
[INFO] running `Command { std: "docker" "start" "-a" "ee9afb08a31efcd3082d9a1788a7dbeaca9365bd9bd1442faeb9267bffecfb46", kill_on_drop: false }`
[INFO] [stdout] warning: fields `start_time` and `references` are never read
[INFO] [stdout]    --> src/span.rs:115:5
[INFO] [stdout]     |
[INFO] [stdout] 109 | struct Inner<S>
[INFO] [stdout]     |        ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 115 |     start_time: SystemTime,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 118 |     references: Vec<SpanReference<S>>,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Inner` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `key` and `value` are never read
[INFO] [stdout]    --> src/span.rs:147:5
[INFO] [stdout]     |
[INFO] [stdout] 146 | pub struct BaggageItem {
[INFO] [stdout]     |            ----------- fields in this struct
[INFO] [stdout] 147 |     key: String,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 148 |     value: String,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `BaggageItem` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `value` are never read
[INFO] [stdout]  --> src/tag.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct Tag {
[INFO] [stdout]   |            --- fields in this struct
[INFO] [stdout] 3 |     name: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 4 |     value: TagValue,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Tag` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling opentracing-rs-core v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `start_time` and `references` are never read
[INFO] [stdout]    --> src/span.rs:115:5
[INFO] [stdout]     |
[INFO] [stdout] 109 | struct Inner<S>
[INFO] [stdout]     |        ----- fields in this struct
[INFO] [stdout] ...
[INFO] [stdout] 115 |     start_time: SystemTime,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 118 |     references: Vec<SpanReference<S>>,
[INFO] [stdout]     |     ^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `Inner` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `key` and `value` are never read
[INFO] [stdout]    --> src/span.rs:147:5
[INFO] [stdout]     |
[INFO] [stdout] 146 | pub struct BaggageItem {
[INFO] [stdout]     |            ----------- fields in this struct
[INFO] [stdout] 147 |     key: String,
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 148 |     value: String,
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `BaggageItem` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `value` are never read
[INFO] [stdout]  --> src/tag.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub struct Tag {
[INFO] [stdout]   |            --- fields in this struct
[INFO] [stdout] 3 |     name: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 4 |     value: TagValue,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Tag` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.61s
[INFO] running `Command { std: "docker" "inspect" "ee9afb08a31efcd3082d9a1788a7dbeaca9365bd9bd1442faeb9267bffecfb46", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ee9afb08a31efcd3082d9a1788a7dbeaca9365bd9bd1442faeb9267bffecfb46", kill_on_drop: false }`
[INFO] [stdout] ee9afb08a31efcd3082d9a1788a7dbeaca9365bd9bd1442faeb9267bffecfb46
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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=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@sha256:4848fb76d95f26979359cc7e45710b1dbc8f3acb7aeedee7c460d7702230f228" "/opt/rustwide/cargo-home/bin/cargo" "+1.91.0" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] bccacf0c205ce80ae312d25d9f45abb3108f0c3893eae65227e2c6ecf2d5ae53
[INFO] running `Command { std: "docker" "start" "-a" "bccacf0c205ce80ae312d25d9f45abb3108f0c3893eae65227e2c6ecf2d5ae53", kill_on_drop: false }`
[INFO] [stderr] warning: fields `start_time` and `references` are never read
[INFO] [stderr]    --> src/span.rs:115:5
[INFO] [stderr]     |
[INFO] [stderr] 109 | struct Inner<S>
[INFO] [stderr]     |        ----- fields in this struct
[INFO] [stderr] ...
[INFO] [stderr] 115 |     start_time: SystemTime,
[INFO] [stderr]     |     ^^^^^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 118 |     references: Vec<SpanReference<S>>,
[INFO] [stderr]     |     ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `Inner` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `key` and `value` are never read
[INFO] [stderr]    --> src/span.rs:147:5
[INFO] [stderr]     |
[INFO] [stderr] 146 | pub struct BaggageItem {
[INFO] [stderr]     |            ----------- fields in this struct
[INFO] [stderr] 147 |     key: String,
[INFO] [stderr]     |     ^^^
[INFO] [stderr] 148 |     value: String,
[INFO] [stderr]     |     ^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `BaggageItem` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: fields `name` and `value` are never read
[INFO] [stderr]  --> src/tag.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | pub struct Tag {
[INFO] [stderr]   |            --- fields in this struct
[INFO] [stderr] 3 |     name: String,
[INFO] [stderr]   |     ^^^^
[INFO] [stderr] 4 |     value: TagValue,
[INFO] [stderr]   |     ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `Tag` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: `opentracing-rs-core` (lib) generated 3 warnings
[INFO] [stderr] warning: `opentracing-rs-core` (lib test) generated 3 warnings (3 duplicates)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/opentracing_rs_core-b6f12802716519a1)
[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 opentracing_rs_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" "bccacf0c205ce80ae312d25d9f45abb3108f0c3893eae65227e2c6ecf2d5ae53", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bccacf0c205ce80ae312d25d9f45abb3108f0c3893eae65227e2c6ecf2d5ae53", kill_on_drop: false }`
[INFO] [stdout] bccacf0c205ce80ae312d25d9f45abb3108f0c3893eae65227e2c6ecf2d5ae53
