[INFO] cloning repository https://github.com/NicholasLYang/rust-calculator
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/NicholasLYang/rust-calculator" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNicholasLYang%2Frust-calculator", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNicholasLYang%2Frust-calculator'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5a85d3d559e4fa9652f54276213edd771a4c48c6
[INFO] checking NicholasLYang/rust-calculator against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FNicholasLYang%2Frust-calculator" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/NicholasLYang/rust-calculator on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/NicholasLYang/rust-calculator
[INFO] finished tweaking git repo https://github.com/NicholasLYang/rust-calculator
[INFO] tweaked toml for git repo https://github.com/NicholasLYang/rust-calculator written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/NicholasLYang/rust-calculator already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded bit-vec v0.5.0
[INFO] [stderr]   Downloaded memchr v2.1.0
[INFO] [stderr]   Downloaded petgraph v0.4.13
[INFO] [stderr]   Downloaded itertools v0.7.8
[INFO] [stderr]   Downloaded phf_generator v0.7.23
[INFO] [stderr]   Downloaded log v0.4.5
[INFO] [stderr]   Downloaded diff v0.1.11
[INFO] [stderr]   Downloaded bit-set v0.5.0
[INFO] [stderr]   Downloaded docopt v1.0.1
[INFO] [stderr]   Downloaded new_debug_unreachable v1.0.1
[INFO] [stderr]   Downloaded regex v1.0.5
[INFO] [stderr]   Downloaded serde_derive v1.0.80
[INFO] [stderr]   Downloaded phf_shared v0.7.23
[INFO] [stderr]   Downloaded fixedbitset v0.1.9
[INFO] [stderr]   Downloaded ordermap v0.3.5
[INFO] [stderr]   Downloaded serde v1.0.80
[INFO] [stderr]   Downloaded lalrpop-util v0.16.1
[INFO] [stderr]   Downloaded ena v0.10.1
[INFO] [stderr]   Downloaded lalrpop v0.16.1
[INFO] [stderr]   Downloaded syn v0.15.14
[INFO] running `Command { std: "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" "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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ccffba8aa594cc1e6a8985322152b6895c26bba839b4f6d3d2d449c3753bfd9c
[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" "ccffba8aa594cc1e6a8985322152b6895c26bba839b4f6d3d2d449c3753bfd9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ccffba8aa594cc1e6a8985322152b6895c26bba839b4f6d3d2d449c3753bfd9c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ccffba8aa594cc1e6a8985322152b6895c26bba839b4f6d3d2d449c3753bfd9c", kill_on_drop: false }`
[INFO] [stdout] ccffba8aa594cc1e6a8985322152b6895c26bba839b4f6d3d2d449c3753bfd9c
[INFO] running `Command { std: "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" "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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8fa3d62b0c1262a20f9523d15536b3f547add7ba35d7f84456946cf88addecff
[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" "8fa3d62b0c1262a20f9523d15536b3f547add7ba35d7f84456946cf88addecff", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling proc-macro2 v0.4.20
[INFO] [stderr]    Compiling unicode-xid v0.1.0
[INFO] [stderr]    Compiling cfg-if v0.1.6
[INFO] [stderr]    Compiling siphasher v0.2.3
[INFO] [stderr]    Compiling serde v1.0.80
[INFO] [stderr]    Compiling ucd-util v0.1.1
[INFO] [stderr]    Compiling utf8-ranges v1.0.1
[INFO] [stderr]    Compiling strsim v0.7.0
[INFO] [stderr]    Compiling either v1.5.0
[INFO] [stderr]    Compiling lalrpop-util v0.16.1
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling regex v1.0.5
[INFO] [stderr]     Checking regex-syntax v0.5.6
[INFO] [stderr]    Compiling rand v0.5.5
[INFO] [stderr]    Compiling typenum v1.10.0
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.1
[INFO] [stderr]    Compiling log v0.4.5
[INFO] [stderr]    Compiling itertools v0.7.8
[INFO] [stderr]    Compiling regex-syntax v0.6.2
[INFO] [stderr]    Compiling phf_shared v0.7.23
[INFO] [stderr]    Compiling ena v0.10.1
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]    Compiling memchr v2.1.0
[INFO] [stderr]    Compiling generic-array v0.12.0
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]    Compiling quote v0.6.8
[INFO] [stderr]    Compiling aho-corasick v0.6.8
[INFO] [stderr]    Compiling block-buffer v0.7.0
[INFO] [stderr]    Compiling digest v0.8.0
[INFO] [stderr]    Compiling sha2 v0.8.0
[INFO] [stderr]    Compiling syn v0.15.14
[INFO] [stderr]    Compiling phf_generator v0.7.23
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]    Compiling serde_derive v1.0.80
[INFO] [stderr]    Compiling docopt v1.0.1
[INFO] [stderr]    Compiling lalrpop v0.16.1
[INFO] [stderr]    Compiling rust-calculator v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/rust-calculator-8faf1188259e3315/out/parser.rs:1622:5
[INFO] [stdout]      |
[INFO] [stdout] 1622 |     (__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/rust-calculator-8faf1188259e3315/out/parser.rs:1630:5
[INFO] [stdout]      |
[INFO] [stdout] 1630 |     (__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/rust-calculator-8faf1188259e3315/out/parser.rs:1638:5
[INFO] [stdout]      |
[INFO] [stdout] 1638 |     (__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/rust-calculator-8faf1188259e3315/out/parser.rs:1666:5
[INFO] [stdout]      |
[INFO] [stdout] 1666 |     (__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/rust-calculator-8faf1188259e3315/out/parser.rs:1694:5
[INFO] [stdout]      |
[INFO] [stdout] 1694 |     (__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/rust-calculator-8faf1188259e3315/out/parser.rs:1712:5
[INFO] [stdout]      |
[INFO] [stdout] 1712 |     (__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/rust-calculator-8faf1188259e3315/out/parser.rs:1622:5
[INFO] [stdout]      |
[INFO] [stdout] 1622 |     (__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/rust-calculator-8faf1188259e3315/out/parser.rs:1630:5
[INFO] [stdout]      |
[INFO] [stdout] 1630 |     (__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/rust-calculator-8faf1188259e3315/out/parser.rs:1638:5
[INFO] [stdout]      |
[INFO] [stdout] 1638 |     (__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/rust-calculator-8faf1188259e3315/out/parser.rs:1666:5
[INFO] [stdout]      |
[INFO] [stdout] 1666 |     (__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/rust-calculator-8faf1188259e3315/out/parser.rs:1694:5
[INFO] [stdout]      |
[INFO] [stdout] 1694 |     (__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/rust-calculator-8faf1188259e3315/out/parser.rs:1712:5
[INFO] [stdout]      |
[INFO] [stdout] 1712 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 49s
[INFO] running `Command { std: "docker" "inspect" "8fa3d62b0c1262a20f9523d15536b3f547add7ba35d7f84456946cf88addecff", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8fa3d62b0c1262a20f9523d15536b3f547add7ba35d7f84456946cf88addecff", kill_on_drop: false }`
[INFO] [stdout] 8fa3d62b0c1262a20f9523d15536b3f547add7ba35d7f84456946cf88addecff