[INFO] crate section_testing 0.0.4 is already in cache
[INFO] extracting crate section_testing 0.0.4 into work/ex/beta-1.38-1/sources/1.37.0/reg/section_testing/0.0.4
[INFO] extracting crate section_testing 0.0.4 into work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/section_testing/0.0.4
[INFO] validating manifest of section_testing-0.0.4 on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of section_testing-0.0.4 on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing section_testing-0.0.4
[INFO] finished frobbing section_testing-0.0.4
[INFO] frobbed toml for section_testing-0.0.4 written to work/ex/beta-1.38-1/sources/1.37.0/reg/section_testing/0.0.4/Cargo.toml
[INFO] started frobbing section_testing-0.0.4
[INFO] finished frobbing section_testing-0.0.4
[INFO] frobbed toml for section_testing-0.0.4 written to work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/section_testing/0.0.4/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing section_testing-0.0.4 against beta-2019-08-13 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/section_testing/0.0.4:/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=warn" "-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" "+beta-2019-08-13" "build" "--frozen"`
[INFO] [stdout] 4ff67b041b2aeff858c73cfaa9bac51433d159f6e56a64e445eb47888e2c7b80
[INFO] running `"docker" "start" "-a" "4ff67b041b2aeff858c73cfaa9bac51433d159f6e56a64e445eb47888e2c7b80"`
[INFO] [stderr]    Compiling section_testing v0.0.4 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:155:15
[INFO] [stderr]     |
[INFO] [stderr] 155 |           let mut count = r.current.values().filter(|x| x.should_enter).count();
[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]     Finished dev [unoptimized + debuginfo] target(s) in 1.70s
[INFO] running `"docker" "inspect" "4ff67b041b2aeff858c73cfaa9bac51433d159f6e56a64e445eb47888e2c7b80"`
[INFO] running `"docker" "rm" "-f" "4ff67b041b2aeff858c73cfaa9bac51433d159f6e56a64e445eb47888e2c7b80"`
[INFO] [stdout] 4ff67b041b2aeff858c73cfaa9bac51433d159f6e56a64e445eb47888e2c7b80
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/section_testing/0.0.4:/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen" "--no-run"`
[INFO] [stdout] 42e6fffa5ff6e850b59a4bed17c006535d3793cc4f04abf0000563516e84dba1
[INFO] running `"docker" "start" "-a" "42e6fffa5ff6e850b59a4bed17c006535d3793cc4f04abf0000563516e84dba1"`
[INFO] [stderr]    Compiling section_testing v0.0.4 (/opt/crater/workdir)
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/lib.rs:155:15
[INFO] [stderr]     |
[INFO] [stderr] 155 |           let mut count = r.current.values().filter(|x| x.should_enter).count();
[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]     Finished dev [unoptimized + debuginfo] target(s) in 1.31s
[INFO] running `"docker" "inspect" "42e6fffa5ff6e850b59a4bed17c006535d3793cc4f04abf0000563516e84dba1"`
[INFO] running `"docker" "rm" "-f" "42e6fffa5ff6e850b59a4bed17c006535d3793cc4f04abf0000563516e84dba1"`
[INFO] [stdout] 42e6fffa5ff6e850b59a4bed17c006535d3793cc4f04abf0000563516e84dba1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/beta-2019-08-13:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/beta-2019-08-13/reg/section_testing/0.0.4:/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=warn" "-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" "+beta-2019-08-13" "test" "--frozen"`
[INFO] [stdout] 77cd210eaab7c67c7aad54591d53e5549c8a2f155b7cd02d81be9f86bb3d1364
[INFO] running `"docker" "start" "-a" "77cd210eaab7c67c7aad54591d53e5549c8a2f155b7cd02d81be9f86bb3d1364"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.05s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/section_testing-39ef4a307855cffc
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests section_testing
[INFO] [stdout] 
[INFO] [stdout] running 1 test
[INFO] [stdout] test src/lib.rs -  (line 12) ... ignored
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "77cd210eaab7c67c7aad54591d53e5549c8a2f155b7cd02d81be9f86bb3d1364"`
[INFO] running `"docker" "rm" "-f" "77cd210eaab7c67c7aad54591d53e5549c8a2f155b7cd02d81be9f86bb3d1364"`
[INFO] [stdout] 77cd210eaab7c67c7aad54591d53e5549c8a2f155b7cd02d81be9f86bb3d1364