[INFO] crate historian 4.0.3 is already in cache
[INFO] checking historian-4.0.3 against try#a243773eaf3fedcd203f10ae4579e4f106bf7ccd for pr-68325
[INFO] extracting crate historian 4.0.3 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate historian 4.0.3 on toolchain a243773eaf3fedcd203f10ae4579e4f106bf7ccd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+a243773eaf3fedcd203f10ae4579e4f106bf7ccd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate historian 4.0.3
[INFO] finished tweaking crates.io crate historian 4.0.3
[INFO] tweaked toml for crates.io crate historian 4.0.3 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+a243773eaf3fedcd203f10ae4579e4f106bf7ccd" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+a243773eaf3fedcd203f10ae4579e4f106bf7ccd" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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=forbid" "-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" "+a243773eaf3fedcd203f10ae4579e4f106bf7ccd" "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] 86d14bc97be724f7b718ef22bf8b2c581d94fa56079317fd3d828a3c3dd572d1
[INFO] running `"docker" "start" "-a" "86d14bc97be724f7b718ef22bf8b2c581d94fa56079317fd3d828a3c3dd572d1"`
[INFO] [stderr]     Checking historian v4.0.3 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> src/lib.rs:166:5
[INFO] [stderr]     |
[INFO] [stderr] 166 |     (unboosted.exp() - 1.)
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: unnecessary parentheses around block return value
[INFO] [stderr]    --> src/lib.rs:166:5
[INFO] [stderr]     |
[INFO] [stderr] 166 |     (unboosted.exp() - 1.)
[INFO] [stderr]     |     ^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr] note: lint level defined here
[INFO] [stderr]    --> src/lib.rs:26:24
[INFO] [stderr]     |
[INFO] [stderr] 26  | #![cfg_attr(test, deny(warnings))]
[INFO] [stderr]     |                        ^^^^^^^^
[INFO] [stderr]     = note: `#[deny(unused_parens)]` implied by `#[deny(warnings)]`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] error: could not compile `historian`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `"docker" "inspect" "86d14bc97be724f7b718ef22bf8b2c581d94fa56079317fd3d828a3c3dd572d1"`
[INFO] running `"docker" "rm" "-f" "86d14bc97be724f7b718ef22bf8b2c581d94fa56079317fd3d828a3c3dd572d1"`
[INFO] [stdout] 86d14bc97be724f7b718ef22bf8b2c581d94fa56079317fd3d828a3c3dd572d1