[INFO] updating cached repository https://github.com/fitzgen/cool-rs
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] ea20b7cd01d2d73d3d2e4ff29579c7d786342b58
[INFO] checking fitzgen/cool-rs against master#45d050cde277b22a755847338f2acc2c7b834141 for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffitzgen%2Fcool-rs" "/workspace/builds/worker-12/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fitzgen/cool-rs on toolchain 45d050cde277b22a755847338f2acc2c7b834141
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/fitzgen/cool-rs
[INFO] finished tweaking git repo https://github.com/fitzgen/cool-rs
[INFO] tweaked toml for git repo https://github.com/fitzgen/cool-rs written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/fitzgen/cool-rs already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+45d050cde277b22a755847338f2acc2c7b834141" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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" "+45d050cde277b22a755847338f2acc2c7b834141" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] ffb0af0677634080bb738c69f536e9b5d2b287102a9b1c32103a49982544a7b5
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "ffb0af0677634080bb738c69f536e9b5d2b287102a9b1c32103a49982544a7b5"`
[INFO] [stderr]    Compiling proc-macro2 v0.4.24
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling rand_core v0.3.0
[INFO] [stderr]    Compiling cfg-if v0.1.6
[INFO] [stderr]    Compiling typenum v1.10.0
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling lazy_static v1.2.0
[INFO] [stderr]    Compiling string_cache_shared v0.3.0
[INFO] [stderr]    Compiling regex v1.0.6
[INFO] [stderr]    Compiling ucd-util v0.1.3
[INFO] [stderr]    Compiling void v1.0.2
[INFO] [stderr]    Compiling utf8-ranges v1.0.2
[INFO] [stderr]    Compiling cc v1.0.25
[INFO] [stderr]    Compiling either v1.5.0
[INFO] [stderr]    Compiling fixedbitset v0.1.9
[INFO] [stderr]    Compiling term v0.4.6
[INFO] [stderr]    Compiling fake-simd v0.1.2
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling ordermap v0.3.5
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]    Compiling diff v0.1.11
[INFO] [stderr]    Compiling unicode-segmentation v1.2.1
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]    Compiling glob v0.2.11
[INFO] [stderr]     Checking rustc-demangle v0.1.9
[INFO] [stderr]     Checking strsim v0.7.0
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking bitflags v1.0.4
[INFO] [stderr]     Checking id-arena v2.0.0
[INFO] [stderr]    Compiling memchr v2.1.1
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling unreachable v1.0.0
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling regex-syntax v0.6.3
[INFO] [stderr]    Compiling itertools v0.7.11
[INFO] [stderr]    Compiling phf_shared v0.7.23
[INFO] [stderr]     Checking textwrap v0.10.0
[INFO] [stderr]    Compiling rand_core v0.2.2
[INFO] [stderr]    Compiling heck v0.3.0
[INFO] [stderr]    Compiling serde v1.0.80
[INFO] [stderr]    Compiling ascii-canvas v1.0.0
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.1
[INFO] [stderr]    Compiling petgraph v0.4.13
[INFO] [stderr]    Compiling ena v0.10.1
[INFO] [stderr]    Compiling rand v0.5.5
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]    Compiling generic-array v0.12.0
[INFO] [stderr]    Compiling aho-corasick v0.6.9
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr]    Compiling block-buffer v0.7.0
[INFO] [stderr]    Compiling digest v0.8.0
[INFO] [stderr]    Compiling backtrace-sys v0.1.24
[INFO] [stderr]    Compiling syn v0.15.22
[INFO] [stderr]    Compiling sha2 v0.8.0
[INFO] [stderr]    Compiling phf_generator v0.7.23
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]     Checking backtrace v0.3.9
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]    Compiling structopt-derive v0.2.13
[INFO] [stderr]    Compiling failure_derive v0.1.3
[INFO] [stderr]     Checking failure v0.1.3
[INFO] [stderr]     Checking structopt v0.2.13
[INFO] [stderr]    Compiling docopt v1.0.2
[INFO] [stderr]    Compiling lalrpop v0.16.2
[INFO] [stderr]    Compiling cool-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> build.rs:30:20
[INFO] [stderr]    |
[INFO] [stderr] 30 |                 'a'...'z' | 'A'...'Z' | '0'...'9' => c,
[INFO] [stderr]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> build.rs:30:32
[INFO] [stderr]    |
[INFO] [stderr] 30 |                 'a'...'z' | 'A'...'Z' | '0'...'9' => c,
[INFO] [stderr]    |                                ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> build.rs:30:44
[INFO] [stderr]    |
[INFO] [stderr] 30 |                 'a'...'z' | 'A'...'Z' | '0'...'9' => c,
[INFO] [stderr]    |                                            ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> build.rs:66:20
[INFO] [stderr]    |
[INFO] [stderr] 66 |                 'a'...'z' | 'A'...'Z' | '0'...'9' => c,
[INFO] [stderr]    |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> build.rs:66:32
[INFO] [stderr]    |
[INFO] [stderr] 66 |                 'a'...'z' | 'A'...'Z' | '0'...'9' => c,
[INFO] [stderr]    |                                ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> build.rs:66:44
[INFO] [stderr]    |
[INFO] [stderr] 66 |                 'a'...'z' | 'A'...'Z' | '0'...'9' => c,
[INFO] [stderr]    |                                            ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> build.rs:104:20
[INFO] [stderr]     |
[INFO] [stderr] 104 |                 'a'...'z' | 'A'...'Z' | '0'...'9' => c,
[INFO] [stderr]     |                    ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> build.rs:104:32
[INFO] [stderr]     |
[INFO] [stderr] 104 |                 'a'...'z' | 'A'...'Z' | '0'...'9' => c,
[INFO] [stderr]     |                                ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]    --> build.rs:104:44
[INFO] [stderr]     |
[INFO] [stderr] 104 |                 'a'...'z' | 'A'...'Z' | '0'...'9' => c,
[INFO] [stderr]     |                                            ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: 9 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:4637:5
[INFO] [stderr]      |
[INFO] [stderr] 4637 |     (__0)
[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 block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:4648:5
[INFO] [stderr]      |
[INFO] [stderr] 4648 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:4840:5
[INFO] [stderr]      |
[INFO] [stderr] 4840 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:4851:5
[INFO] [stderr]      |
[INFO] [stderr] 4851 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:4927:5
[INFO] [stderr]      |
[INFO] [stderr] 4927 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:4962:5
[INFO] [stderr]      |
[INFO] [stderr] 4962 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5043:5
[INFO] [stderr]      |
[INFO] [stderr] 5043 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5054:5
[INFO] [stderr]      |
[INFO] [stderr] 5054 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5100:5
[INFO] [stderr]      |
[INFO] [stderr] 5100 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5173:5
[INFO] [stderr]      |
[INFO] [stderr] 5173 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5210:5
[INFO] [stderr]      |
[INFO] [stderr] 5210 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5247:5
[INFO] [stderr]      |
[INFO] [stderr] 5247 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5284:5
[INFO] [stderr]      |
[INFO] [stderr] 5284 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5321:5
[INFO] [stderr]      |
[INFO] [stderr] 5321 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5344:5
[INFO] [stderr]      |
[INFO] [stderr] 5344 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5367:5
[INFO] [stderr]      |
[INFO] [stderr] 5367 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5390:5
[INFO] [stderr]      |
[INFO] [stderr] 5390 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5413:5
[INFO] [stderr]      |
[INFO] [stderr] 5413 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5446:5
[INFO] [stderr]      |
[INFO] [stderr] 5446 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5705:5
[INFO] [stderr]      |
[INFO] [stderr] 5705 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5903:5
[INFO] [stderr]      |
[INFO] [stderr] 5903 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5977:5
[INFO] [stderr]      |
[INFO] [stderr] 5977 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:4637:5
[INFO] [stderr]      |
[INFO] [stderr] 4637 |     (__0)
[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 block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:4648:5
[INFO] [stderr]      |
[INFO] [stderr] 4648 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:4840:5
[INFO] [stderr]      |
[INFO] [stderr] 4840 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:4851:5
[INFO] [stderr]      |
[INFO] [stderr] 4851 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:4927:5
[INFO] [stderr]      |
[INFO] [stderr] 4927 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:4962:5
[INFO] [stderr]      |
[INFO] [stderr] 4962 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5043:5
[INFO] [stderr]      |
[INFO] [stderr] 5043 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5054:5
[INFO] [stderr]      |
[INFO] [stderr] 5054 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5100:5
[INFO] [stderr]      |
[INFO] [stderr] 5100 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5173:5
[INFO] [stderr]      |
[INFO] [stderr] 5173 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5210:5
[INFO] [stderr]      |
[INFO] [stderr] 5210 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5247:5
[INFO] [stderr]      |
[INFO] [stderr] 5247 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5284:5
[INFO] [stderr]      |
[INFO] [stderr] 5284 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5321:5
[INFO] [stderr]      |
[INFO] [stderr] 5321 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5344:5
[INFO] [stderr]      |
[INFO] [stderr] 5344 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5367:5
[INFO] [stderr]      |
[INFO] [stderr] 5367 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5390:5
[INFO] [stderr]      |
[INFO] [stderr] 5390 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5413:5
[INFO] [stderr]      |
[INFO] [stderr] 5413 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5446:5
[INFO] [stderr]      |
[INFO] [stderr] 5446 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5705:5
[INFO] [stderr]      |
[INFO] [stderr] 5705 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5903:5
[INFO] [stderr]      |
[INFO] [stderr] 5903 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/cool-rs-68bf0e6c3ed2dbdb/out/frontend/grammar.rs:5977:5
[INFO] [stderr]      |
[INFO] [stderr] 5977 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 22 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 22 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 16s
[INFO] running `"docker" "inspect" "ffb0af0677634080bb738c69f536e9b5d2b287102a9b1c32103a49982544a7b5"`
[INFO] running `"docker" "rm" "-f" "ffb0af0677634080bb738c69f536e9b5d2b287102a9b1c32103a49982544a7b5"`
[INFO] [stdout] ffb0af0677634080bb738c69f536e9b5d2b287102a9b1c32103a49982544a7b5