[INFO] crate spmc_buffer 0.5.1 is already in cache
[INFO] extracting crate spmc_buffer 0.5.1 into work/ex/beta-1.38-1/sources/1.37.0/reg/spmc_buffer/0.5.1
[INFO] extracting crate spmc_buffer 0.5.1 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/spmc_buffer/0.5.1
[INFO] validating manifest of spmc_buffer-0.5.1 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 spmc_buffer-0.5.1 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 spmc_buffer-0.5.1
[INFO] finished frobbing spmc_buffer-0.5.1
[INFO] frobbed toml for spmc_buffer-0.5.1 written to work/ex/beta-1.38-1/sources/1.37.0/reg/spmc_buffer/0.5.1/Cargo.toml
[INFO] started frobbing spmc_buffer-0.5.1
[INFO] finished frobbing spmc_buffer-0.5.1
[INFO] frobbed toml for spmc_buffer-0.5.1 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/spmc_buffer/0.5.1/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] [stderr]     Blocking waiting for file lock on package cache
[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 spmc_buffer-0.5.1 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-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/spmc_buffer/0.5.1:/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] 0b5fbf9fd8c1d2bbb7a0e094579598b039459f69d8b43bae212821f64169d163
[INFO] running `"docker" "start" "-a" "0b5fbf9fd8c1d2bbb7a0e094579598b039459f69d8b43bae212821f64169d163"`
[INFO] [stderr]    Compiling testbench v0.7.0
[INFO] [stderr]    Compiling spmc_buffer v0.5.1 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.75s
[INFO] running `"docker" "inspect" "0b5fbf9fd8c1d2bbb7a0e094579598b039459f69d8b43bae212821f64169d163"`
[INFO] running `"docker" "rm" "-f" "0b5fbf9fd8c1d2bbb7a0e094579598b039459f69d8b43bae212821f64169d163"`
[INFO] [stdout] 0b5fbf9fd8c1d2bbb7a0e094579598b039459f69d8b43bae212821f64169d163
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-6/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/reg/spmc_buffer/0.5.1:/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] 29b2ad04f82436dd92a4c2e2ea7afa32932f6c0102fd0401cc98c45b3b711c7f
[INFO] running `"docker" "start" "-a" "29b2ad04f82436dd92a4c2e2ea7afa32932f6c0102fd0401cc98c45b3b711c7f"`
[INFO] [stderr]    Compiling spmc_buffer v0.5.1 (/opt/crater/workdir)
[INFO] [stderr] error[E0432]: unresolved import `testbench::race_cell::UsizeRaceCell`
[INFO] [stderr]    --> src/lib.rs:541:39
[INFO] [stderr]     |
[INFO] [stderr] 541 |     use testbench::race_cell::{Racey, UsizeRaceCell};
[INFO] [stderr]     |                                       ^^^^^^^^^^^^^ no `UsizeRaceCell` in `race_cell`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0432`.
[INFO] [stderr] error: Could not compile `spmc_buffer`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "29b2ad04f82436dd92a4c2e2ea7afa32932f6c0102fd0401cc98c45b3b711c7f"`
[INFO] running `"docker" "rm" "-f" "29b2ad04f82436dd92a4c2e2ea7afa32932f6c0102fd0401cc98c45b3b711c7f"`
[INFO] [stdout] 29b2ad04f82436dd92a4c2e2ea7afa32932f6c0102fd0401cc98c45b3b711c7f