[INFO] crate libdeadmock 0.1.6 is already in cache
[INFO] checking libdeadmock-0.1.6 against try#8a5e87609850cdd8679aada01eb0f3062f254ca8 for pr-71140
[INFO] extracting crate libdeadmock 0.1.6 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate libdeadmock 0.1.6 on toolchain 8a5e87609850cdd8679aada01eb0f3062f254ca8
[INFO] running `"/workspace/cargo-home/bin/cargo" "+8a5e87609850cdd8679aada01eb0f3062f254ca8" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate libdeadmock 0.1.6
[INFO] finished tweaking crates.io crate libdeadmock 0.1.6
[INFO] tweaked toml for crates.io crate libdeadmock 0.1.6 written to /workspace/builds/worker-4/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] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] fb9ff899b711677739056150e074590188522367b2aa61f20f95af983ee3814d
[INFO] running `"docker" "start" "-a" "fb9ff899b711677739056150e074590188522367b2aa61f20f95af983ee3814d"`
[INFO] [stderr]     Checking futures v0.1.29
[INFO] [stderr]     Checking tokio-trace-core v0.1.0
[INFO] [stderr]     Checking cached v0.12.0
[INFO] [stderr]     Checking slog-try v0.2.0
[INFO] [stderr]     Checking slog-async v2.5.0
[INFO] [stderr]    Compiling syn-mid v0.5.0
[INFO] [stderr]     Checking uuid v0.7.4
[INFO] [stderr]     Checking tokio v0.2.18
[INFO] [stderr]     Checking libeither v0.4.0
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking typed-headers v0.2.0
[INFO] [stderr]     Checking slog-term v2.5.0
[INFO] [stderr] error[E0599]: no function or associated item named `iter_sources` found for trait object `dyn std::error::Error` in the current scope
[INFO] [stderr]   --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/libeither-0.4.0/src/error.rs:79:38
[INFO] [stderr]    |
[INFO] [stderr] 79 |         let res = std::error::Error::iter_sources(self).fold(
[INFO] [stderr]    |                                      ^^^^^^^^^^^^ function or associated item not found in `dyn std::error::Error`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0599`.
[INFO] [stderr] error: could not compile `libeither`.
[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" "fb9ff899b711677739056150e074590188522367b2aa61f20f95af983ee3814d"`
[INFO] running `"docker" "rm" "-f" "fb9ff899b711677739056150e074590188522367b2aa61f20f95af983ee3814d"`
[INFO] [stdout] fb9ff899b711677739056150e074590188522367b2aa61f20f95af983ee3814d