[INFO] crate differential-dataflow 0.9.0 is already in cache
[INFO] extracting crate differential-dataflow 0.9.0 into work/ex/pr-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/reg/differential-dataflow/0.9.0
[INFO] extracting crate differential-dataflow 0.9.0 into work/ex/pr-62181/sources/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc/reg/differential-dataflow/0.9.0
[INFO] validating manifest of differential-dataflow-0.9.0 on toolchain master#6ea4036cd20a4b1ab1d56e555108c21735ff6946
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ea4036cd20a4b1ab1d56e555108c21735ff6946-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of differential-dataflow-0.9.0 on toolchain try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+003a7b6b5753e8509fdfe7949d4f0873ba71e4fc-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing differential-dataflow-0.9.0
[INFO] finished frobbing differential-dataflow-0.9.0
[INFO] frobbed toml for differential-dataflow-0.9.0 written to work/ex/pr-62181/sources/master#6ea4036cd20a4b1ab1d56e555108c21735ff6946/reg/differential-dataflow/0.9.0/Cargo.toml
[INFO] started frobbing differential-dataflow-0.9.0
[INFO] finished frobbing differential-dataflow-0.9.0
[INFO] frobbed toml for differential-dataflow-0.9.0 written to work/ex/pr-62181/sources/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc/reg/differential-dataflow/0.9.0/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ea4036cd20a4b1ab1d56e555108c21735ff6946-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+003a7b6b5753e8509fdfe7949d4f0873ba71e4fc-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+6ea4036cd20a4b1ab1d56e555108c21735ff6946-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+003a7b6b5753e8509fdfe7949d4f0873ba71e4fc-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking differential-dataflow-0.9.0 against try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc for pr-62181
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-62181/worker-4/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-62181/sources/try#003a7b6b5753e8509fdfe7949d4f0873ba71e4fc/reg/differential-dataflow/0.9.0:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+003a7b6b5753e8509fdfe7949d4f0873ba71e4fc-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] b10a33fb069376bfee2e5a710e07ecdfccf3820f5ceb6a1ac9c231c9bcf00fa7
[INFO] running `"docker" "start" "-a" "b10a33fb069376bfee2e5a710e07ecdfccf3820f5ceb6a1ac9c231c9bcf00fa7"`
[INFO] [stderr]     Checking timely_sort v0.1.6
[INFO] [stderr]     Checking graph_map v0.1.0
[INFO] [stderr]     Checking timely_communication v0.9.0
[INFO] [stderr]     Checking timely v0.9.0
[INFO] [stderr]     Checking differential-dataflow v0.9.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]    --> src/trace/layers/hashed.rs:149:3
[INFO] [stderr]     |
[INFO] [stderr] 149 |         /// self.temp *should* be sorted by (hash, key); let's check!
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 150 |         debug_assert!((1 .. self.temp.len()).all(|i| self.temp[i-1].key < self.temp[i].key));
[INFO] [stderr]     |         ------------------------------------------------------------------------------------- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_doc_comments)] on by default
[INFO] [stderr]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]    --> src/trace/layers/hashed.rs:149:3
[INFO] [stderr]     |
[INFO] [stderr] 149 |         /// self.temp *should* be sorted by (hash, key); let's check!
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 150 |         debug_assert!((1 .. self.temp.len()).all(|i| self.temp[i-1].key < self.temp[i].key));
[INFO] [stderr]     |         ------------------------------------------------------------------------------------- rustdoc does not generate documentation for macro expansions
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_doc_comments)] on by default
[INFO] [stderr]     = help: to document an item produced by a macro, the macro must produce the documentation as part of its expansion
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/operators/arrange.rs:361:17
[INFO] [stderr]     |
[INFO] [stderr] 361 |             let mut shutdown_button_ref = &mut shutdown_button;
[INFO] [stderr]     |                 ----^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/operators/arrange.rs:361:17
[INFO] [stderr]     |
[INFO] [stderr] 361 |             let mut shutdown_button_ref = &mut shutdown_button;
[INFO] [stderr]     |                 ----^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |                 |
[INFO] [stderr]     |                 help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `timely::dataflow::operators::Map`
[INFO] [stderr]    --> examples/sswp.rs:137:13
[INFO] [stderr]     |
[INFO] [stderr] 137 |         use timely::dataflow::operators::Map;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `timely::dataflow::operators::Delay`
[INFO] [stderr]    --> examples/sswp.rs:138:13
[INFO] [stderr]     |
[INFO] [stderr] 138 |         use timely::dataflow::operators::Delay;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `differential_dataflow::AsCollection`
[INFO] [stderr]    --> examples/sswp.rs:139:13
[INFO] [stderr]     |
[INFO] [stderr] 139 |         use differential_dataflow::AsCollection;
[INFO] [stderr]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.66s
[INFO] running `"docker" "inspect" "b10a33fb069376bfee2e5a710e07ecdfccf3820f5ceb6a1ac9c231c9bcf00fa7"`
[INFO] running `"docker" "rm" "-f" "b10a33fb069376bfee2e5a710e07ecdfccf3820f5ceb6a1ac9c231c9bcf00fa7"`
[INFO] [stdout] b10a33fb069376bfee2e5a710e07ecdfccf3820f5ceb6a1ac9c231c9bcf00fa7