[INFO] fetching crate rustfmt_lib 1.0.0...
[INFO] checking rustfmt_lib-1.0.0 against try#a243773eaf3fedcd203f10ae4579e4f106bf7ccd for pr-68325
[INFO] extracting crate rustfmt_lib 1.0.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate rustfmt_lib 1.0.0 on toolchain a243773eaf3fedcd203f10ae4579e4f106bf7ccd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+a243773eaf3fedcd203f10ae4579e4f106bf7ccd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate rustfmt_lib 1.0.0
[INFO] finished tweaking crates.io crate rustfmt_lib 1.0.0
[INFO] tweaked toml for crates.io crate rustfmt_lib 1.0.0 written to /workspace/builds/worker-8/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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rustfmt-config_proc_macro v0.4.0
[INFO] [stderr]   Downloaded rustfmt_emitter v1.0.0
[INFO] [stderr]   Downloaded rustfmt_configuration v1.0.0
[INFO] [stderr]   Downloaded rustfmt_ignore v0.4.10
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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] 13760d27a9ac883f59e7e288c130420ae698e63cb0ba43e40f8bbdf035d10431
[INFO] running `"docker" "start" "-a" "13760d27a9ac883f59e7e288c130420ae698e63cb0ba43e40f8bbdf035d10431"`
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]     Checking jobserver v0.1.19
[INFO] [stderr]     Checking rustc-ap-serialize v610.0.0
[INFO] [stderr]     Checking parking_lot_core v0.6.2
[INFO] [stderr]    Compiling thiserror-impl v1.0.9
[INFO] [stderr]    Compiling rustfmt-config_proc_macro v0.4.0
[INFO] [stderr]    Compiling rustc-ap-rustc_macros v610.0.0
[INFO] [stderr]     Checking rustfmt_ignore v0.4.10
[INFO] [stderr]     Checking crossbeam-queue v0.1.2
[INFO] [stderr]     Checking parking_lot v0.9.0
[INFO] [stderr]     Checking rustc-rayon-core v0.3.0
[INFO] [stderr]     Checking rustc-rayon v0.3.0
[INFO] [stderr]     Checking rustc-ap-rustc_index v610.0.0
[INFO] [stderr]     Checking thiserror v1.0.9
[INFO] [stderr]     Checking rustc-ap-rustc_data_structures v610.0.0
[INFO] [stderr]     Checking rustc-ap-arena v610.0.0
[INFO] [stderr]     Checking rustc-ap-syntax_pos v610.0.0
[INFO] [stderr]     Checking rustfmt_configuration v1.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_target v610.0.0
[INFO] [stderr]     Checking rustc-ap-rustc_errors v610.0.0
[INFO] [stderr]     Checking rustc-ap-syntax v610.0.0
[INFO] [stderr]     Checking rustfmt_emitter v1.0.0
[INFO] [stderr]     Checking rustfmt_lib v1.0.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> src/expr.rs:1160:5
[INFO] [stderr]      |
[INFO] [stderr] 1160 | /     (block.stmts.len() == 1
[INFO] [stderr] 1161 | |         && stmt_is_expr(&block.stmts[0])
[INFO] [stderr] 1162 | |         && !block_contains_comment(context, block)
[INFO] [stderr] 1163 | |         && attrs.map_or(true, |a| a.is_empty()))
[INFO] [stderr]      | |________________________________________________^
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]      |
[INFO] [stderr] 1160 |     block.stmts.len() == 1
[INFO] [stderr] 1161 |         && stmt_is_expr(&block.stmts[0])
[INFO] [stderr] 1162 |         && !block_contains_comment(context, block)
[INFO] [stderr] 1163 |         && attrs.map_or(true, |a| a.is_empty())
[INFO] [stderr]      |
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> src/expr.rs:1160:5
[INFO] [stderr]      |
[INFO] [stderr] 1160 | /     (block.stmts.len() == 1
[INFO] [stderr] 1161 | |         && stmt_is_expr(&block.stmts[0])
[INFO] [stderr] 1162 | |         && !block_contains_comment(context, block)
[INFO] [stderr] 1163 | |         && attrs.map_or(true, |a| a.is_empty()))
[INFO] [stderr]      | |________________________________________________^
[INFO] [stderr]      |
[INFO] [stderr]      = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] help: remove these parentheses
[INFO] [stderr]      |
[INFO] [stderr] 1160 |     block.stmts.len() == 1
[INFO] [stderr] 1161 |         && stmt_is_expr(&block.stmts[0])
[INFO] [stderr] 1162 |         && !block_contains_comment(context, block)
[INFO] [stderr] 1163 |         && attrs.map_or(true, |a| a.is_empty())
[INFO] [stderr]      |
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 55.11s
[INFO] running `"docker" "inspect" "13760d27a9ac883f59e7e288c130420ae698e63cb0ba43e40f8bbdf035d10431"`
[INFO] running `"docker" "rm" "-f" "13760d27a9ac883f59e7e288c130420ae698e63cb0ba43e40f8bbdf035d10431"`
[INFO] [stdout] 13760d27a9ac883f59e7e288c130420ae698e63cb0ba43e40f8bbdf035d10431