[INFO] crate test-env-log 0.2.2 is already in cache
[INFO] checking test-env-log-0.2.2 against try#8a5e87609850cdd8679aada01eb0f3062f254ca8 for pr-71140
[INFO] extracting crate test-env-log 0.2.2 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate test-env-log 0.2.2 on toolchain 8a5e87609850cdd8679aada01eb0f3062f254ca8
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8a5e87609850cdd8679aada01eb0f3062f254ca8" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate test-env-log 0.2.2
[INFO] finished tweaking crates.io crate test-env-log 0.2.2
[INFO] tweaked toml for crates.io crate test-env-log 0.2.2 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8a5e87609850cdd8679aada01eb0f3062f254ca8" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8a5e87609850cdd8679aada01eb0f3062f254ca8" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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" "+8a5e87609850cdd8679aada01eb0f3062f254ca8" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 73efb23b2aca19c716711ea8e35a2d6cc2e5370bf90560c7e38d8887f6e3b73e
[INFO] running `"docker" "start" "-a" "73efb23b2aca19c716711ea8e35a2d6cc2e5370bf90560c7e38d8887f6e3b73e"`
[INFO] [stderr]     Checking tracing v0.1.13
[INFO] [stderr]    Compiling test-env-log v0.2.2 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking tokio v0.2.18
[INFO] [stderr]     Checking tracing-subscriber v0.1.6
[INFO] [stderr] error[E0412]: cannot find type `Once` in crate `tracing_core`
[INFO] [stderr]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/tracing-0.1.13/src/lib.rs:784:35
[INFO] [stderr]     |
[INFO] [stderr] 784 |     pub type Once = tracing_core::Once<()>;
[INFO] [stderr]     |                                   ^^^^ not found in `tracing_core`
[INFO] [stderr]     |
[INFO] [stderr] help: possible candidates are found in other modules, you can import them into scope
[INFO] [stderr]     |
[INFO] [stderr] 778 |     use core::iter::Once;
[INFO] [stderr]     |
[INFO] [stderr] 778 |     use crate::__macro_support::Once;
[INFO] [stderr]     |
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0412`.
[INFO] [stderr] error: could not compile `tracing`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "73efb23b2aca19c716711ea8e35a2d6cc2e5370bf90560c7e38d8887f6e3b73e"`
[INFO] running `"docker" "rm" "-f" "73efb23b2aca19c716711ea8e35a2d6cc2e5370bf90560c7e38d8887f6e3b73e"`
[INFO] [stdout] 73efb23b2aca19c716711ea8e35a2d6cc2e5370bf90560c7e38d8887f6e3b73e