[INFO] crate opentracing-rs 0.1.2 is already in cache
[INFO] extracting crate opentracing-rs 0.1.2 into work/ex/beta-1.38-1/sources/1.37.0/reg/opentracing-rs/0.1.2
[INFO] extracting crate opentracing-rs 0.1.2 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/opentracing-rs/0.1.2
[INFO] validating manifest of opentracing-rs-0.1.2 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of opentracing-rs-0.1.2 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing opentracing-rs-0.1.2
[INFO] finished frobbing opentracing-rs-0.1.2
[INFO] frobbed toml for opentracing-rs-0.1.2 written to work/ex/beta-1.38-1/sources/1.37.0/reg/opentracing-rs/0.1.2/Cargo.toml
[INFO] started frobbing opentracing-rs-0.1.2
[INFO] finished frobbing opentracing-rs-0.1.2
[INFO] frobbed toml for opentracing-rs-0.1.2 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/opentracing-rs/0.1.2/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing opentracing-rs-0.1.2 against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/opentracing-rs/0.1.2:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] b87c54a65468e06ab37eee72b0b05179f20459dec8705e3408af712b67ba7298
[INFO] running `"docker" "start" "-a" "b87c54a65468e06ab37eee72b0b05179f20459dec8705e3408af712b67ba7298"`
[INFO] [stderr]    Compiling opentracing-rs-jaeger v0.1.0
[INFO] [stderr]    Compiling opentracing-rs v0.1.2 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.74s
[INFO] running `"docker" "inspect" "b87c54a65468e06ab37eee72b0b05179f20459dec8705e3408af712b67ba7298"`
[INFO] running `"docker" "rm" "-f" "b87c54a65468e06ab37eee72b0b05179f20459dec8705e3408af712b67ba7298"`
[INFO] [stdout] b87c54a65468e06ab37eee72b0b05179f20459dec8705e3408af712b67ba7298
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-0/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/opentracing-rs/0.1.2:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] eb973751b9ca144b304af73b50d848ab576d2cfa9b81a6b1e751ba0ea0ce3e2d
[INFO] running `"docker" "start" "-a" "eb973751b9ca144b304af73b50d848ab576d2cfa9b81a6b1e751ba0ea0ce3e2d"`
[INFO] [stderr]    Compiling opentracing-rs v0.1.2 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved import `opentracing_rs::jaeger::TransportProtocol`
[INFO] [stderr]   --> examples/jaeger.rs:10:38
[INFO] [stderr]    |
[INFO] [stderr] 10 |     jaeger::{Tracer as JaegerTracer, TransportProtocol},
[INFO] [stderr]    |                                      ^^^^^^^^^^^^^^^^^ no `TransportProtocol` in `jaeger`
[INFO] [stderr] 
[INFO] [stderr] error[E0599]: no function or associated item named `builder` found for type `opentracing_rs::opentracing_rs_jaeger::Tracer<_, _>` in the current scope
[INFO] [stderr]   --> examples/jaeger.rs:16:40
[INFO] [stderr]    |
[INFO] [stderr] 16 |         let mut tracer = JaegerTracer::builder()
[INFO] [stderr]    |                                        ^^^^^^^ function or associated item not found in `opentracing_rs::opentracing_rs_jaeger::Tracer<_, _>`
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `SpanBuilder`
[INFO] [stderr]   --> examples/jaeger.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     SpanBuilder, Tracer,
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Tracer`
[INFO] [stderr]   --> examples/jaeger.rs:11:18
[INFO] [stderr]    |
[INFO] [stderr] 11 |     SpanBuilder, Tracer,
[INFO] [stderr]    |                  ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0432, E0599.
[INFO] [stderr] For more information about an error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `opentracing-rs`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "eb973751b9ca144b304af73b50d848ab576d2cfa9b81a6b1e751ba0ea0ce3e2d"`
[INFO] running `"docker" "rm" "-f" "eb973751b9ca144b304af73b50d848ab576d2cfa9b81a6b1e751ba0ea0ce3e2d"`
[INFO] [stdout] eb973751b9ca144b304af73b50d848ab576d2cfa9b81a6b1e751ba0ea0ce3e2d