[INFO] crate follow 0.1.5 is already in cache
[INFO] extracting crate follow 0.1.5 into work/ex/pr-57617/sources/master#e2f221c75932de7a29845c8d6f1f73536ad00c41/reg/follow/0.1.5
[INFO] extracting crate follow 0.1.5 into work/ex/pr-57617/sources/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff/reg/follow/0.1.5
[INFO] validating manifest of follow-0.1.5 on toolchain master#e2f221c75932de7a29845c8d6f1f73536ad00c41
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e2f221c75932de7a29845c8d6f1f73536ad00c41-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of follow-0.1.5 on toolchain try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0bfb90d213a93e466b33d078a5b535a2a6f9c5ff-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing follow-0.1.5
[INFO] finished frobbing follow-0.1.5
[INFO] frobbed toml for follow-0.1.5 written to work/ex/pr-57617/sources/master#e2f221c75932de7a29845c8d6f1f73536ad00c41/reg/follow/0.1.5/Cargo.toml
[INFO] started frobbing follow-0.1.5
[INFO] finished frobbing follow-0.1.5
[INFO] frobbed toml for follow-0.1.5 written to work/ex/pr-57617/sources/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff/reg/follow/0.1.5/Cargo.toml
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e2f221c75932de7a29845c8d6f1f73536ad00c41-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0bfb90d213a93e466b33d078a5b535a2a6f9c5ff-alt" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+e2f221c75932de7a29845c8d6f1f73536ad00c41-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+0bfb90d213a93e466b33d078a5b535a2a6f9c5ff-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking follow-0.1.5 against try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff for pr-57617
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57617/worker-6/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57617/sources/try#0bfb90d213a93e466b33d078a5b535a2a6f9c5ff/reg/follow/0.1.5:/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" "+0bfb90d213a93e466b33d078a5b535a2a6f9c5ff-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 197bb0c94c643dc0fd5ca3becfcef02762b6b1563d85fce03aa742e69faad39a
[INFO] running `"docker" "start" "-a" "197bb0c94c643dc0fd5ca3becfcef02762b6b1563d85fce03aa742e69faad39a"`
[INFO] [stderr]     Checking fern v0.3.5
[INFO] [stderr]     Checking timebomb v0.1.2
[INFO] [stderr]     Checking docopt v0.7.0
[INFO] [stderr]     Checking follow v0.1.5 (/opt/crater/workdir)
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/worker.rs:180:27
[INFO] [stderr]     |
[INFO] [stderr] 180 |                 return Ok((cursor..len));
[INFO] [stderr]     |                           ^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/worker.rs:189:27
[INFO] [stderr]     |
[INFO] [stderr] 189 |                 return Ok((0..len));
[INFO] [stderr]     |                           ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/worker.rs:180:27
[INFO] [stderr]     |
[INFO] [stderr] 180 |                 return Ok((cursor..len));
[INFO] [stderr]     |                           ^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: #[warn(unused_parens)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/worker.rs:189:27
[INFO] [stderr]     |
[INFO] [stderr] 189 |                 return Ok((0..len));
[INFO] [stderr]     |                           ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around function argument
[INFO] [stderr]    --> src/worker.rs:658:46
[INFO] [stderr]     |
[INFO] [stderr] 658 |             let content = build_sized_string((((BUFFER_SIZE as usize) * 2) - 1));
[INFO] [stderr]     |                                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_verbose`
[INFO] [stderr]   --> src/args.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn is_verbose(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `is_verbose`
[INFO] [stderr]   --> src/args.rs:32:5
[INFO] [stderr]    |
[INFO] [stderr] 32 |     pub fn is_verbose(&self) -> bool {
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.76s
[INFO] running `"docker" "inspect" "197bb0c94c643dc0fd5ca3becfcef02762b6b1563d85fce03aa742e69faad39a"`
[INFO] running `"docker" "rm" "-f" "197bb0c94c643dc0fd5ca3becfcef02762b6b1563d85fce03aa742e69faad39a"`
[INFO] [stdout] 197bb0c94c643dc0fd5ca3becfcef02762b6b1563d85fce03aa742e69faad39a