[INFO] fetching crate math-calc 0.1.0...
[INFO] testing math-calc-0.1.0 against beta-2020-10-09 for beta-1.48-1
[INFO] extracting crate math-calc 0.1.0 into /workspace/builds/worker-11/source
[INFO] validating manifest of crates.io crate math-calc 0.1.0 on toolchain beta-2020-10-09
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate math-calc 0.1.0
[INFO] finished tweaking crates.io crate math-calc 0.1.0
[INFO] tweaked toml for crates.io crate math-calc 0.1.0 written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-10-09" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded thread_local v1.0.1
[INFO] [stderr]   Downloaded constant_time_eq v0.1.5
[INFO] [stderr]   Downloaded arrayref v0.3.6
[INFO] [stderr]   Downloaded blake2b_simd v0.5.10
[INFO] [stderr]   Downloaded base64 v0.12.3
[INFO] [stderr]   Downloaded strsim v0.9.3
[INFO] [stderr]   Downloaded redox_users v0.3.5
[INFO] [stderr]   Downloaded block-padding v0.1.5
[INFO] [stderr]   Downloaded sha2 v0.8.2
[INFO] [stderr]   Downloaded redox_syscall v0.1.57
[INFO] [stderr]   Downloaded typenum v1.12.0
[INFO] [stderr]   Downloaded arrayvec v0.5.1
[INFO] [stderr]   Downloaded atty v0.2.14
[INFO] [stderr]   Downloaded bit-vec v0.6.2
[INFO] [stderr]   Downloaded ena v0.13.1
[INFO] [stderr]   Downloaded bit-set v0.5.2
[INFO] [stderr]   Downloaded diff v0.1.12
[INFO] [stderr]   Downloaded aho-corasick v0.7.14
[INFO] [stderr]   Downloaded regex-syntax v0.6.20
[INFO] [stderr]   Downloaded new_debug_unreachable v1.0.4
[INFO] [stderr]   Downloaded itertools v0.8.2
[INFO] [stderr]   Downloaded string_cache v0.7.5
[INFO] [stderr]   Downloaded byteorder v1.3.4
[INFO] [stderr]   Downloaded autocfg v0.1.7
[INFO] [stderr]   Downloaded regex v1.4.1
[INFO] [stderr]   Downloaded rust-argon2 v0.8.2
[INFO] [stderr]   Downloaded memchr v2.3.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 224f010246699b4389afd933f309b97c30fd30203120206451ebf9b731beabc2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "224f010246699b4389afd933f309b97c30fd30203120206451ebf9b731beabc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "224f010246699b4389afd933f309b97c30fd30203120206451ebf9b731beabc2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "224f010246699b4389afd933f309b97c30fd30203120206451ebf9b731beabc2", kill_on_drop: false }`
[INFO] [stdout] 224f010246699b4389afd933f309b97c30fd30203120206451ebf9b731beabc2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cbd4f4c7178cad4d0745e9ee034cfe63b2b824aaaf1deb4b7afe0dc4120c0b98
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "cbd4f4c7178cad4d0745e9ee034cfe63b2b824aaaf1deb4b7afe0dc4120c0b98", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling lalrpop-util v0.17.2
[INFO] [stderr]    Compiling docopt v1.1.0
[INFO] [stderr]    Compiling string_cache v0.7.5
[INFO] [stderr]    Compiling lalrpop v0.17.2
[INFO] [stderr]    Compiling math-calc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> /opt/rustwide/target/debug/build/math-calc-313cff538a544710/out/grammar.rs:995:5
[INFO] [stdout]     |
[INFO] [stdout] 995 |     (__0)
[INFO] [stdout]     |     ^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/math-calc-313cff538a544710/out/grammar.rs:1006:5
[INFO] [stdout]      |
[INFO] [stdout] 1006 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/math-calc-313cff538a544710/out/grammar.rs:1071:5
[INFO] [stdout]      |
[INFO] [stdout] 1071 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/math-calc-313cff538a544710/out/grammar.rs:1108:5
[INFO] [stdout]      |
[INFO] [stdout] 1108 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/math-calc-313cff538a544710/out/grammar.rs:1132:5
[INFO] [stdout]      |
[INFO] [stdout] 1132 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/math-calc-313cff538a544710/out/grammar.rs:1143:5
[INFO] [stdout]      |
[INFO] [stdout] 1143 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/math-calc-313cff538a544710/out/grammar.rs:1156:5
[INFO] [stdout]      |
[INFO] [stdout] 1156 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 33.86s
[INFO] running `Command { std: "docker" "inspect" "cbd4f4c7178cad4d0745e9ee034cfe63b2b824aaaf1deb4b7afe0dc4120c0b98", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cbd4f4c7178cad4d0745e9ee034cfe63b2b824aaaf1deb4b7afe0dc4120c0b98", kill_on_drop: false }`
[INFO] [stdout] cbd4f4c7178cad4d0745e9ee034cfe63b2b824aaaf1deb4b7afe0dc4120c0b98
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 5ccfae2040d08b34c0d8ef3b90501e7b8b9a03a3663d18925855b473796c539d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "5ccfae2040d08b34c0d8ef3b90501e7b8b9a03a3663d18925855b473796c539d", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling math-calc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> /opt/rustwide/target/debug/build/math-calc-313cff538a544710/out/grammar.rs:995:5
[INFO] [stdout]     |
[INFO] [stdout] 995 |     (__0)
[INFO] [stdout]     |     ^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/math-calc-313cff538a544710/out/grammar.rs:1006:5
[INFO] [stdout]      |
[INFO] [stdout] 1006 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/math-calc-313cff538a544710/out/grammar.rs:1071:5
[INFO] [stdout]      |
[INFO] [stdout] 1071 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/math-calc-313cff538a544710/out/grammar.rs:1108:5
[INFO] [stdout]      |
[INFO] [stdout] 1108 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/math-calc-313cff538a544710/out/grammar.rs:1132:5
[INFO] [stdout]      |
[INFO] [stdout] 1132 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/math-calc-313cff538a544710/out/grammar.rs:1143:5
[INFO] [stdout]      |
[INFO] [stdout] 1143 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/math-calc-313cff538a544710/out/grammar.rs:1156:5
[INFO] [stdout]      |
[INFO] [stdout] 1156 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]    --> /opt/rustwide/target/debug/build/math-calc-313cff538a544710/out/grammar.rs:995:5
[INFO] [stdout]     |
[INFO] [stdout] 995 |     (__0)
[INFO] [stdout]     |     ^^^^^ help: remove these parentheses
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/math-calc-313cff538a544710/out/grammar.rs:1006:5
[INFO] [stdout]      |
[INFO] [stdout] 1006 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/math-calc-313cff538a544710/out/grammar.rs:1071:5
[INFO] [stdout]      |
[INFO] [stdout] 1071 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/math-calc-313cff538a544710/out/grammar.rs:1108:5
[INFO] [stdout]      |
[INFO] [stdout] 1108 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/math-calc-313cff538a544710/out/grammar.rs:1132:5
[INFO] [stdout]      |
[INFO] [stdout] 1132 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/math-calc-313cff538a544710/out/grammar.rs:1143:5
[INFO] [stdout]      |
[INFO] [stdout] 1143 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/math-calc-313cff538a544710/out/grammar.rs:1156:5
[INFO] [stdout]      |
[INFO] [stdout] 1156 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.10s
[INFO] running `Command { std: "docker" "inspect" "5ccfae2040d08b34c0d8ef3b90501e7b8b9a03a3663d18925855b473796c539d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5ccfae2040d08b34c0d8ef3b90501e7b8b9a03a3663d18925855b473796c539d", kill_on_drop: false }`
[INFO] [stdout] 5ccfae2040d08b34c0d8ef3b90501e7b8b9a03a3663d18925855b473796c539d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-10-09" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 82962d57f62b3dfe1f84a6aa377f6cedd55990b7233705323548ec35c3ea82e3
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "82962d57f62b3dfe1f84a6aa377f6cedd55990b7233705323548ec35c3ea82e3", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> /opt/rustwide/target/debug/build/math-calc-313cff538a544710/out/grammar.rs:995:5
[INFO] [stderr]     |
[INFO] [stderr] 995 |     (__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/math-calc-313cff538a544710/out/grammar.rs:1006:5
[INFO] [stderr]      |
[INFO] [stderr] 1006 |     (__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/math-calc-313cff538a544710/out/grammar.rs:1071:5
[INFO] [stderr]      |
[INFO] [stderr] 1071 |     (__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/math-calc-313cff538a544710/out/grammar.rs:995:5
[INFO] [stderr]     |
[INFO] [stderr] 995 |     (__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/math-calc-313cff538a544710/out/grammar.rs:1006:5
[INFO] [stderr]      |
[INFO] [stderr] 1006 |     (__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/math-calc-313cff538a544710/out/grammar.rs:1108:5
[INFO] [stderr]      |
[INFO] [stderr] 1108 |     (__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/math-calc-313cff538a544710/out/grammar.rs:1071:5
[INFO] [stderr]      |
[INFO] [stderr] 1071 |     (__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/math-calc-313cff538a544710/out/grammar.rs:1132:5
[INFO] [stderr]      |
[INFO] [stderr] 1132 |     (__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/math-calc-313cff538a544710/out/grammar.rs:1108:5
[INFO] [stderr]      |
[INFO] [stderr] 1108 |     (__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/math-calc-313cff538a544710/out/grammar.rs:1143:5
[INFO] [stderr]      |
[INFO] [stderr] 1143 |     (__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/math-calc-313cff538a544710/out/grammar.rs:1132:5
[INFO] [stderr]      |
[INFO] [stderr] 1132 |     (__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/math-calc-313cff538a544710/out/grammar.rs:1156:5
[INFO] [stderr]      |
[INFO] [stderr] 1156 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/math-calc-313cff538a544710/out/grammar.rs:1143:5
[INFO] [stderr]      |
[INFO] [stderr] 1143 |     (__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/math-calc-313cff538a544710/out/grammar.rs:1156:5
[INFO] [stderr]      |
[INFO] [stderr] 1156 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.07s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/math_calc-7ed64d2671836c73
[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 math-calc
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]    --> /opt/rustwide/target/debug/build/math-calc-313cff538a544710/out/grammar.rs:995:5
[INFO] [stderr]     |
[INFO] [stderr] 995 |     (__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/math-calc-313cff538a544710/out/grammar.rs:1006:5
[INFO] [stderr]      |
[INFO] [stderr] 1006 |     (__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/math-calc-313cff538a544710/out/grammar.rs:1071:5
[INFO] [stderr]      |
[INFO] [stderr] 1071 |     (__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/math-calc-313cff538a544710/out/grammar.rs:1108:5
[INFO] [stderr]      |
[INFO] [stderr] 1108 |     (__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/math-calc-313cff538a544710/out/grammar.rs:1132:5
[INFO] [stderr]      |
[INFO] [stderr] 1132 |     (__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/math-calc-313cff538a544710/out/grammar.rs:1143:5
[INFO] [stderr]      |
[INFO] [stderr] 1143 |     (__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/math-calc-313cff538a544710/out/grammar.rs:1156:5
[INFO] [stderr]      |
[INFO] [stderr] 1156 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: 7 warnings emitted
[INFO] [stderr] 
[INFO] [stdout] 
[INFO] [stdout] running 4 tests
[INFO] [stdout] test src/lib.rs - parse_str (line 99) ... ok
[INFO] [stdout] test src/lib.rs - parse_u8_slice (line 56) ... ok
[INFO] [stdout] test src/lib.rs - (line 15) ... ok
[INFO] [stdout] test src/lib.rs - parse_u8_slice (line 73) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "82962d57f62b3dfe1f84a6aa377f6cedd55990b7233705323548ec35c3ea82e3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "82962d57f62b3dfe1f84a6aa377f6cedd55990b7233705323548ec35c3ea82e3", kill_on_drop: false }`
[INFO] [stdout] 82962d57f62b3dfe1f84a6aa377f6cedd55990b7233705323548ec35c3ea82e3
