[INFO] crate magic-ring-buffer 0.1.0 is already in cache
[INFO] checking magic-ring-buffer-0.1.0 against master#6250d56355d72264ece721e8d0dc95b16a6824b1 for pr-68350
[INFO] extracting crate magic-ring-buffer 0.1.0 into /workspace/builds/worker-6/source
[INFO] validating manifest of crates.io crate magic-ring-buffer 0.1.0 on toolchain 6250d56355d72264ece721e8d0dc95b16a6824b1
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate magic-ring-buffer 0.1.0
[INFO] finished tweaking crates.io crate magic-ring-buffer 0.1.0
[INFO] tweaked toml for crates.io crate magic-ring-buffer 0.1.0 written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+6250d56355d72264ece721e8d0dc95b16a6824b1" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 4b95843880e76bfb03fef0a18c4e56e6f957be1e8c05fc2ce8a4b4fea19534f2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "4b95843880e76bfb03fef0a18c4e56e6f957be1e8c05fc2ce8a4b4fea19534f2"`
[INFO] [stderr]     Checking strum v0.13.0
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling strum_macros v0.13.0
[INFO] [stderr]     Checking file-descriptors v0.8.7
[INFO] [stderr]     Checking magic-ring-buffer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/MirroredMemoryMapCreationError.rs:37:32
[INFO] [stderr]    |
[INFO] [stderr] 37 |     fn source(&self) ->  Option<&(error::Error + 'static)>
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error + 'static`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/MirroredMemoryMapCreationError.rs:37:32
[INFO] [stderr]    |
[INFO] [stderr] 37 |     fn source(&self) ->  Option<&(error::Error + 'static)>
[INFO] [stderr]    |                                   ^^^^^^^^^^^^^^^^^^^^^^ help: use `dyn`: `dyn error::Error + 'static`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(bare_trait_objects)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 19.23s
[INFO] running `"docker" "inspect" "4b95843880e76bfb03fef0a18c4e56e6f957be1e8c05fc2ce8a4b4fea19534f2"`
[INFO] running `"docker" "rm" "-f" "4b95843880e76bfb03fef0a18c4e56e6f957be1e8c05fc2ce8a4b4fea19534f2"`
[INFO] [stdout] 4b95843880e76bfb03fef0a18c4e56e6f957be1e8c05fc2ce8a4b4fea19534f2