Dec 14 18:15:04.525 INFO testing stream-combinators-0.1.0 against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 14 18:15:04.525 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-4/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +bd47d6825bf4090517549d33cfef10d3300b4a75-alt build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 14 18:15:05.000 INFO [stdout] bc0fdba73f81152a9454cefd13bbf7bdaefb2d9dd3ac8757872a06e399a51df2
Dec 14 18:15:05.002 INFO running `"docker" "start" "-a" "bc0fdba73f81152a9454cefd13bbf7bdaefb2d9dd3ac8757872a06e399a51df2"`
Dec 14 18:15:06.102 INFO [stderr] usermod: no changes
Dec 14 18:15:06.261 INFO [stderr]    Compiling stream-combinators v0.1.0 (/source)
Dec 14 18:15:06.939 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.78s
Dec 14 18:15:06.947 INFO [stderr] su: No module specific data is present
Dec 14 18:15:07.387 INFO running `"docker" "inspect" "bc0fdba73f81152a9454cefd13bbf7bdaefb2d9dd3ac8757872a06e399a51df2"`
Dec 14 18:15:07.527 INFO running `"docker" "rm" "-f" "bc0fdba73f81152a9454cefd13bbf7bdaefb2d9dd3ac8757872a06e399a51df2"`
Dec 14 18:15:07.754 INFO [stdout] bc0fdba73f81152a9454cefd13bbf7bdaefb2d9dd3ac8757872a06e399a51df2
Dec 14 18:15:07.760 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-4/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +bd47d6825bf4090517549d33cfef10d3300b4a75-alt test --frozen --no-run" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 14 18:15:08.136 INFO [stdout] db578cd9d3dd669c03ec1ba55ccba9bb17a296ba97b0be5b6e048b36d9dc972e
Dec 14 18:15:08.138 INFO running `"docker" "start" "-a" "db578cd9d3dd669c03ec1ba55ccba9bb17a296ba97b0be5b6e048b36d9dc972e"`
Dec 14 18:15:09.598 INFO [stderr] usermod: no changes
Dec 14 18:15:09.767 INFO [stderr]    Compiling tokio-stdin v0.1.1
Dec 14 18:15:11.179 INFO [stderr]    Compiling stream-combinators v0.1.0 (/source)
Dec 14 18:15:12.231 INFO [stderr] warning: unnecessary parentheses around function argument
Dec 14 18:15:12.231 INFO [stderr]  --> examples/into_pairs.rs:9:41
Dec 14 18:15:12.231 INFO [stderr]   |
Dec 14 18:15:12.231 INFO [stderr] 9 |     let number_stream = iter_ok::<_,()>((0..6));
Dec 14 18:15:12.231 INFO [stderr]   |                                         ^^^^^^ help: remove these parentheses
Dec 14 18:15:12.231 INFO [stderr]   |
Dec 14 18:15:12.231 INFO [stderr]   = note: #[warn(unused_parens)] on by default
Dec 14 18:15:12.231 INFO [stderr] 
Dec 14 18:15:21.746 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.12s
Dec 14 18:15:21.753 INFO [stderr] su: No module specific data is present
Dec 14 18:15:22.166 INFO running `"docker" "inspect" "db578cd9d3dd669c03ec1ba55ccba9bb17a296ba97b0be5b6e048b36d9dc972e"`
Dec 14 18:15:22.295 INFO running `"docker" "rm" "-f" "db578cd9d3dd669c03ec1ba55ccba9bb17a296ba97b0be5b6e048b36d9dc972e"`
Dec 14 18:15:22.446 INFO [stdout] db578cd9d3dd669c03ec1ba55ccba9bb17a296ba97b0be5b6e048b36d9dc972e