[INFO] fetching crate spmc_buffer 0.5.1...
[INFO] checking spmc_buffer-0.5.1 against master#a874956d940ecb3ed524b6176a171219ac4787ea for pr-76104
[INFO] extracting crate spmc_buffer 0.5.1 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate spmc_buffer 0.5.1 on toolchain a874956d940ecb3ed524b6176a171219ac4787ea
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate spmc_buffer 0.5.1
[INFO] finished tweaking crates.io crate spmc_buffer 0.5.1
[INFO] tweaked toml for crates.io crate spmc_buffer 0.5.1 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f7fb5d0210d7cff0feb4aa03574b2be8032ba1eb9b5bae0c25b3a680608f00fa
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "f7fb5d0210d7cff0feb4aa03574b2be8032ba1eb9b5bae0c25b3a680608f00fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f7fb5d0210d7cff0feb4aa03574b2be8032ba1eb9b5bae0c25b3a680608f00fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f7fb5d0210d7cff0feb4aa03574b2be8032ba1eb9b5bae0c25b3a680608f00fa", kill_on_drop: false }`
[INFO] [stdout] f7fb5d0210d7cff0feb4aa03574b2be8032ba1eb9b5bae0c25b3a680608f00fa
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=forbid" "-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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+a874956d940ecb3ed524b6176a171219ac4787ea" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] dcac70d546a2b43a05e15c2fc3d3ec3eec809f8235b82d993387aac9e1b4607d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "dcac70d546a2b43a05e15c2fc3d3ec3eec809f8235b82d993387aac9e1b4607d", kill_on_drop: false }`
[INFO] [stderr]     Checking testbench v0.7.3
[INFO] [stderr]     Checking spmc_buffer v0.5.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0432]: unresolved import `testbench::race_cell::UsizeRaceCell`
[INFO] [stdout]    --> src/lib.rs:541:39
[INFO] [stdout]     |
[INFO] [stdout] 541 |     use testbench::race_cell::{Racey, UsizeRaceCell};
[INFO] [stdout]     |                                       ^^^^^^^^^^^^^ no `UsizeRaceCell` in `race_cell`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0432`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `spmc_buffer`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "dcac70d546a2b43a05e15c2fc3d3ec3eec809f8235b82d993387aac9e1b4607d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dcac70d546a2b43a05e15c2fc3d3ec3eec809f8235b82d993387aac9e1b4607d", kill_on_drop: false }`
[INFO] [stdout] dcac70d546a2b43a05e15c2fc3d3ec3eec809f8235b82d993387aac9e1b4607d