[INFO] fetching crate tao-of-rust 1.0.2...
[INFO] checking tao-of-rust-1.0.2 against nightly-2019-10-27 for pr-65897
[INFO] extracting crate tao-of-rust 1.0.2 into /workspace/builds/worker-0/source
[INFO] validating manifest of crates.io crate tao-of-rust 1.0.2 on toolchain nightly-2019-10-27
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate tao-of-rust 1.0.2
[INFO] finished tweaking crates.io crate tao-of-rust 1.0.2
[INFO] tweaked toml for crates.io crate tao-of-rust 1.0.2 written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+nightly-2019-10-27" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded failures_crate v0.1.0
[INFO] [stderr]   Downloaded csv_challenge v0.1.0
[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=allow" "-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" "+nightly-2019-10-27" "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] 3ee0a9546d5279458567214091947d2146a72525804e9822d925c2576235d052
[INFO] running `"docker" "start" "-a" "3ee0a9546d5279458567214091947d2146a72525804e9822d925c2576235d052"`
[INFO] [stderr]     Checking csv_challenge v0.1.0
[INFO] [stderr]     Checking failures_crate v0.1.0
[INFO] [stderr]     Checking tao-of-rust v1.0.2 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0520]: `swim` specializes an item from a parent `impl`, but that item is not marked `default`
[INFO] [stderr]    --> src/ch03/trait_limit.rs:157:9
[INFO] [stderr]     |
[INFO] [stderr] 154 |       impl<T> Swimmer for Diver<T> {}
[INFO] [stderr]     |       ------------------------------- parent `impl` is here
[INFO] [stderr] ...
[INFO] [stderr] 157 | /         fn swim(&self) {
[INFO] [stderr] 158 | |             println!("drowning, help!")
[INFO] [stderr] 159 | |         }
[INFO] [stderr]     | |_________^ cannot specialize default item `swim`
[INFO] [stderr]     |
[INFO] [stderr]     = note: to specialize, `swim` in the parent `impl` must be marked `default`
[INFO] [stderr] 
[INFO] [stderr] error[E0520]: `swim` specializes an item from a parent `impl`, but that item is not marked `default`
[INFO] [stderr]    --> src/ch03/trait_limit.rs:157:9
[INFO] [stderr]     |
[INFO] [stderr] 154 |       impl<T> Swimmer for Diver<T> {}
[INFO] [stderr]     |       ------------------------------- parent `impl` is here
[INFO] [stderr] ...
[INFO] [stderr] 157 | /         fn swim(&self) {
[INFO] [stderr] 158 | |             println!("drowning, help!")
[INFO] [stderr] 159 | |         }
[INFO] [stderr]     | |_________^ cannot specialize default item `swim`
[INFO] [stderr]     |
[INFO] [stderr]     = note: to specialize, `swim` in the parent `impl` must be marked `default`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0520`.
[INFO] [stderr] error: could not compile `tao-of-rust`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0520`.
[INFO] [stderr] error: could not compile `tao-of-rust`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "3ee0a9546d5279458567214091947d2146a72525804e9822d925c2576235d052"`
[INFO] running `"docker" "rm" "-f" "3ee0a9546d5279458567214091947d2146a72525804e9822d925c2576235d052"`
[INFO] [stdout] 3ee0a9546d5279458567214091947d2146a72525804e9822d925c2576235d052