[INFO] cloning repository https://github.com/cronokirby/iku
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/cronokirby/iku" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcronokirby%2Fiku", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcronokirby%2Fiku'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d567cb80522a7bd2c84eb61ca86bb6229798f819
[INFO] testing cronokirby/iku against try#d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2 for pr-86479
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fcronokirby%2Fiku" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/cronokirby/iku on toolchain d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/cronokirby/iku
[INFO] finished tweaking git repo https://github.com/cronokirby/iku
[INFO] tweaked toml for git repo https://github.com/cronokirby/iku written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/cronokirby/iku already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded string_cache_codegen v0.4.4
[INFO] [stderr]   Downloaded string_cache v0.7.5
[INFO] [stderr]   Downloaded blake2b_simd v0.5.9
[INFO] [stderr]   Downloaded ascii-canvas v2.0.0
[INFO] [stderr]   Downloaded ena v0.13.1
[INFO] [stderr]   Downloaded lalrpop v0.17.2
[INFO] [stderr]   Downloaded diff v0.1.12
[INFO] [stderr]   Downloaded proc-macro-error v0.4.4
[INFO] [stderr]   Downloaded syn-mid v0.4.0
[INFO] [stderr]   Downloaded new_debug_unreachable v1.0.4
[INFO] [stderr]   Downloaded structopt-derive v0.4.0
[INFO] [stderr]   Downloaded lalrpop-util v0.17.2
[INFO] [stderr]   Downloaded proc-macro-error-attr v0.4.3
[INFO] [stderr]   Downloaded structopt v0.3.7
[INFO] [stderr]   Downloaded rustversion v1.0.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 686cbccaafe3aa9dd9bf58d10ac84527824cb6b406215dbb8e7e0a97c5dd6f73
[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" "686cbccaafe3aa9dd9bf58d10ac84527824cb6b406215dbb8e7e0a97c5dd6f73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "686cbccaafe3aa9dd9bf58d10ac84527824cb6b406215dbb8e7e0a97c5dd6f73", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "686cbccaafe3aa9dd9bf58d10ac84527824cb6b406215dbb8e7e0a97c5dd6f73", kill_on_drop: false }`
[INFO] [stdout] 686cbccaafe3aa9dd9bf58d10ac84527824cb6b406215dbb8e7e0a97c5dd6f73
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=forbid" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 24bc1607aa819ff7e081fe4e112d863865a3142b88810d14b06383d0dcf3617b
[INFO] running `Command { std: "docker" "start" "-a" "24bc1607aa819ff7e081fe4e112d863865a3142b88810d14b06383d0dcf3617b", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling autocfg v0.1.7
[INFO] [stderr]    Compiling syn v1.0.11
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling typenum v1.11.2
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling bit-vec v0.5.1
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling lalrpop-util v0.17.2
[INFO] [stderr]    Compiling vec_map v0.8.1
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling phf_shared v0.7.24
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling atty v0.2.13
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling bit-set v0.5.1
[INFO] [stderr]    Compiling clap v2.33.0
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling ena v0.13.1
[INFO] [stderr]    Compiling term v0.5.2
[INFO] [stderr]    Compiling aho-corasick v0.7.6
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling generic-array v0.12.3
[INFO] [stderr]    Compiling ascii-canvas v2.0.0
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling sha2 v0.8.0
[INFO] [stderr]    Compiling regex v1.3.1
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling string_cache_codegen v0.4.4
[INFO] [stderr]    Compiling string_cache v0.7.5
[INFO] [stderr]    Compiling syn-mid v0.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling rustversion v1.0.1
[INFO] [stderr]    Compiling proc-macro-error v0.4.4
[INFO] [stderr]    Compiling proc-macro-error-attr v0.4.3
[INFO] [stderr]    Compiling structopt-derive v0.4.0
[INFO] [stderr]    Compiling structopt v0.3.7
[INFO] [stderr]    Compiling docopt v1.1.0
[INFO] [stderr]    Compiling lalrpop v0.17.2
[INFO] [stderr]    Compiling iku v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/iku-bea51dd80e8a60e3/out/parse_ast.rs:4174:5
[INFO] [stdout]      |
[INFO] [stdout] 4174 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4267:5
[INFO] [stdout]      |
[INFO] [stdout] 4267 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4285:5
[INFO] [stdout]      |
[INFO] [stdout] 4285 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4303:5
[INFO] [stdout]      |
[INFO] [stdout] 4303 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4331:5
[INFO] [stdout]      |
[INFO] [stdout] 4331 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4379:5
[INFO] [stdout]      |
[INFO] [stdout] 4379 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4407:5
[INFO] [stdout]      |
[INFO] [stdout] 4407 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4445:5
[INFO] [stdout]      |
[INFO] [stdout] 4445 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4462:5
[INFO] [stdout]      |
[INFO] [stdout] 4462 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4505:5
[INFO] [stdout]      |
[INFO] [stdout] 4505 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4513:5
[INFO] [stdout]      |
[INFO] [stdout] 4513 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4523:5
[INFO] [stdout]      |
[INFO] [stdout] 4523 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4564:5
[INFO] [stdout]      |
[INFO] [stdout] 4564 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4614:5
[INFO] [stdout]      |
[INFO] [stdout] 4614 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4708:5
[INFO] [stdout]      |
[INFO] [stdout] 4708 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4802:5
[INFO] [stdout]      |
[INFO] [stdout] 4802 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4862:5
[INFO] [stdout]      |
[INFO] [stdout] 4862 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4905:5
[INFO] [stdout]      |
[INFO] [stdout] 4905 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4948:5
[INFO] [stdout]      |
[INFO] [stdout] 4948 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4974:5
[INFO] [stdout]      |
[INFO] [stdout] 4974 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 20 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 20s
[INFO] running `Command { std: "docker" "inspect" "24bc1607aa819ff7e081fe4e112d863865a3142b88810d14b06383d0dcf3617b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "24bc1607aa819ff7e081fe4e112d863865a3142b88810d14b06383d0dcf3617b", kill_on_drop: false }`
[INFO] [stdout] 24bc1607aa819ff7e081fe4e112d863865a3142b88810d14b06383d0dcf3617b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=forbid" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 03734a22fd944dc05ed357138786c05602923f138f89d476d8e928089bd32d8e
[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" "03734a22fd944dc05ed357138786c05602923f138f89d476d8e928089bd32d8e", kill_on_drop: false }`
[INFO] [stderr]    Compiling iku v0.5.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/iku-bea51dd80e8a60e3/out/parse_ast.rs:4174:5
[INFO] [stdout]      |
[INFO] [stdout] 4174 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4267:5
[INFO] [stdout]      |
[INFO] [stdout] 4267 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4285:5
[INFO] [stdout]      |
[INFO] [stdout] 4285 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4303:5
[INFO] [stdout]      |
[INFO] [stdout] 4303 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4331:5
[INFO] [stdout]      |
[INFO] [stdout] 4331 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4379:5
[INFO] [stdout]      |
[INFO] [stdout] 4379 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4407:5
[INFO] [stdout]      |
[INFO] [stdout] 4407 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4445:5
[INFO] [stdout]      |
[INFO] [stdout] 4445 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4462:5
[INFO] [stdout]      |
[INFO] [stdout] 4462 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4505:5
[INFO] [stdout]      |
[INFO] [stdout] 4505 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4513:5
[INFO] [stdout]      |
[INFO] [stdout] 4513 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4523:5
[INFO] [stdout]      |
[INFO] [stdout] 4523 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4564:5
[INFO] [stdout]      |
[INFO] [stdout] 4564 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4614:5
[INFO] [stdout]      |
[INFO] [stdout] 4614 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4708:5
[INFO] [stdout]      |
[INFO] [stdout] 4708 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4802:5
[INFO] [stdout]      |
[INFO] [stdout] 4802 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4862:5
[INFO] [stdout]      |
[INFO] [stdout] 4862 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4905:5
[INFO] [stdout]      |
[INFO] [stdout] 4905 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4948:5
[INFO] [stdout]      |
[INFO] [stdout] 4948 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4974:5
[INFO] [stdout]      |
[INFO] [stdout] 4974 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 20 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 4.17s
[INFO] running `Command { std: "docker" "inspect" "03734a22fd944dc05ed357138786c05602923f138f89d476d8e928089bd32d8e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "03734a22fd944dc05ed357138786c05602923f138f89d476d8e928089bd32d8e", kill_on_drop: false }`
[INFO] [stdout] 03734a22fd944dc05ed357138786c05602923f138f89d476d8e928089bd32d8e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=forbid" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+d2e9fff28e244f1ea4927194f1f9b77f93e2ffe2" "test" "--frozen", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ce97998df3906bcf45a8b25c6784b42078fa93523b57fc3b55c9de1a8a78d978
[INFO] running `Command { std: "docker" "start" "-a" "ce97998df3906bcf45a8b25c6784b42078fa93523b57fc3b55c9de1a8a78d978", kill_on_drop: false }`
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/iku-bea51dd80e8a60e3/out/parse_ast.rs:4174:5
[INFO] [stderr]      |
[INFO] [stderr] 4174 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4267:5
[INFO] [stderr]      |
[INFO] [stderr] 4267 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4285:5
[INFO] [stderr]      |
[INFO] [stderr] 4285 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4303:5
[INFO] [stderr]      |
[INFO] [stderr] 4303 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4331:5
[INFO] [stderr]      |
[INFO] [stderr] 4331 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4379:5
[INFO] [stderr]      |
[INFO] [stderr] 4379 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4407:5
[INFO] [stderr]      |
[INFO] [stderr] 4407 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4445:5
[INFO] [stderr]      |
[INFO] [stderr] 4445 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4462:5
[INFO] [stderr]      |
[INFO] [stderr] 4462 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4505:5
[INFO] [stderr]      |
[INFO] [stderr] 4505 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4513:5
[INFO] [stderr]      |
[INFO] [stderr] 4513 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4523:5
[INFO] [stderr]      |
[INFO] [stderr] 4523 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4564:5
[INFO] [stderr]      |
[INFO] [stderr] 4564 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4614:5
[INFO] [stderr]      |
[INFO] [stderr] 4614 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4708:5
[INFO] [stderr]      |
[INFO] [stderr] 4708 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4802:5
[INFO] [stderr]      |
[INFO] [stderr] 4802 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4862:5
[INFO] [stderr]      |
[INFO] [stderr] 4862 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4905:5
[INFO] [stderr]      |
[INFO] [stderr] 4905 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4948:5
[INFO] [stderr]      |
[INFO] [stderr] 4948 |     (__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/iku-bea51dd80e8a60e3/out/parse_ast.rs:4974:5
[INFO] [stderr]      |
[INFO] [stderr] 4974 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: `iku` (bin "iku" test) generated 20 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.09s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/iku-fdb5d92cb14cfae5)
[INFO] [stdout] running 28 tests
[INFO] [stdout] test ast::test::display_works_for_single_tuples ... ok
[INFO] [stdout] test test_programs::test_prog_20 ... ok
[INFO] [stdout] test test_programs::test_prog_14 ... ok
[INFO] [stdout] test test_programs::test_prog_2 ... ok
[INFO] [stdout] test test_programs::test_prog_12 ... ok
[INFO] [stdout] test lexer::test::string_litterals_lex ... ok
[INFO] [stdout] test lexer::test::spaces_are_skipped_when_lexing ... ok
[INFO] [stdout] test test_programs::test_prog_24 ... ok
[INFO] [stdout] test test_programs::test_prog_1 ... ok
[INFO] [stdout] test test_programs::test_prog_16 ... ok
[INFO] [stdout] test test_programs::test_prog_18 ... ok
[INFO] [stdout] test test_programs::test_prog_17 ... ok
[INFO] [stdout] test test_programs::test_prog_13 ... ok
[INFO] [stdout] test test_programs::test_prog_11 ... ok
[INFO] [stdout] test test_programs::test_prog_23 ... ok
[INFO] [stdout] test test_programs::test_prog_15 ... ok
[INFO] [stdout] test lexer::test::unicode_names_can_be_lexed ... ok
[INFO] [stdout] test test_programs::test_prog_21 ... ok
[INFO] [stdout] test test_programs::test_prog_6 ... ok
[INFO] [stdout] test test_programs::test_prog_19 ... ok
[INFO] [stdout] test test_programs::test_prog_4 ... ok
[INFO] [stdout] test test_programs::test_prog_22 ... ok
[INFO] [stdout] test test_programs::test_prog_5 ... ok
[INFO] [stdout] test test_programs::test_prog_10 ... ok
[INFO] [stdout] test test_programs::test_prog_8 ... ok
[INFO] [stdout] test test_programs::test_prog_3 ... ok
[INFO] [stdout] test test_programs::test_prog_7 ... ok
[INFO] [stdout] test test_programs::test_prog_9 ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 28 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.25s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "ce97998df3906bcf45a8b25c6784b42078fa93523b57fc3b55c9de1a8a78d978", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce97998df3906bcf45a8b25c6784b42078fa93523b57fc3b55c9de1a8a78d978", kill_on_drop: false }`
[INFO] [stdout] ce97998df3906bcf45a8b25c6784b42078fa93523b57fc3b55c9de1a8a78d978