[INFO] fetching crate lalrpop-lambda 0.6.1...
[INFO] checking lalrpop-lambda-0.6.1 against try#575650af7d7ca88602df28e39d27bf3e456c306e for pr-80579
[INFO] extracting crate lalrpop-lambda 0.6.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate lalrpop-lambda 0.6.1 on toolchain 575650af7d7ca88602df28e39d27bf3e456c306e
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+575650af7d7ca88602df28e39d27bf3e456c306e" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate lalrpop-lambda 0.6.1
[INFO] finished tweaking crates.io crate lalrpop-lambda 0.6.1
[INFO] tweaked toml for crates.io crate lalrpop-lambda 0.6.1 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate lalrpop-lambda 0.6.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+575650af7d7ca88602df28e39d27bf3e456c306e" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ena v0.13.0
[INFO] [stderr]   Downloaded lalrpop-util v0.17.0
[INFO] [stderr]   Downloaded lalrpop v0.17.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+575650af7d7ca88602df28e39d27bf3e456c306e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] aa9502010ec5f1c71128a494b9dd52eff9a890ac625e9184762cb0946e9f282c
[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" "aa9502010ec5f1c71128a494b9dd52eff9a890ac625e9184762cb0946e9f282c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "aa9502010ec5f1c71128a494b9dd52eff9a890ac625e9184762cb0946e9f282c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "aa9502010ec5f1c71128a494b9dd52eff9a890ac625e9184762cb0946e9f282c", kill_on_drop: false }`
[INFO] [stdout] aa9502010ec5f1c71128a494b9dd52eff9a890ac625e9184762cb0946e9f282c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+575650af7d7ca88602df28e39d27bf3e456c306e" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9d56982d58c9b2c82816e4a716bb0085300cbffbf150a74fb008df9961f376dc
[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" "9d56982d58c9b2c82816e4a716bb0085300cbffbf150a74fb008df9961f376dc", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.58
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[INFO] [stderr]    Compiling serde_derive v1.0.92
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[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.45
[INFO] [stderr]     Checking serde_json v1.0.39
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[INFO] [stderr]    Compiling lalrpop v0.17.0
[INFO] [stderr]     Checking criterion v0.2.11
[INFO] [stderr]    Compiling lalrpop-lambda v0.6.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: identifier pair considered confusable between `y` and `γ`
[INFO] [stdout]    --> src/macros.rs:144:14
[INFO] [stdout]     |
[INFO] [stdout] 144 | macro_rules! γ {
[INFO] [stdout]     |              ^
[INFO] [stdout]     | 
[INFO] [stdout]    ::: src/lib.rs:347:51
[INFO] [stdout]     |
[INFO] [stdout] 347 |         assert_eq!(set! { variable!(x), variable!(y) },
[INFO] [stdout]     |                                                   - this is where the previous identifier occurred
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(confusable_idents)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/lalrpop-lambda-d6a7754bd37d2c08/out/parse.rs:2949:5
[INFO] [stdout]      |
[INFO] [stdout] 2949 |     (__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/lalrpop-lambda-d6a7754bd37d2c08/out/parse.rs:2960:5
[INFO] [stdout]      |
[INFO] [stdout] 2960 |     (__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/lalrpop-lambda-d6a7754bd37d2c08/out/parse.rs:3085:5
[INFO] [stdout]      |
[INFO] [stdout] 3085 |     (__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/lalrpop-lambda-d6a7754bd37d2c08/out/parse.rs:3096:5
[INFO] [stdout]      |
[INFO] [stdout] 3096 |     (__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/lalrpop-lambda-d6a7754bd37d2c08/out/parse.rs:3201:5
[INFO] [stdout]      |
[INFO] [stdout] 3201 |     (__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/lalrpop-lambda-d6a7754bd37d2c08/out/parse.rs:3235:5
[INFO] [stdout]      |
[INFO] [stdout] 3235 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: identifier pair considered confusable between `y` and `γ`
[INFO] [stdout]    --> src/macros.rs:144:14
[INFO] [stdout]     |
[INFO] [stdout] 144 | macro_rules! γ {
[INFO] [stdout]     |              ^
[INFO] [stdout]     | 
[INFO] [stdout]    ::: src/lib.rs:347:51
[INFO] [stdout]     |
[INFO] [stdout] 347 |         assert_eq!(set! { variable!(x), variable!(y) },
[INFO] [stdout]     |                                                   - this is where the previous identifier occurred
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(confusable_idents)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around block return value
[INFO] [stdout]     --> /opt/rustwide/target/debug/build/lalrpop-lambda-d6a7754bd37d2c08/out/parse.rs:2949:5
[INFO] [stdout]      |
[INFO] [stdout] 2949 |     (__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/lalrpop-lambda-d6a7754bd37d2c08/out/parse.rs:2960:5
[INFO] [stdout]      |
[INFO] [stdout] 2960 |     (__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/lalrpop-lambda-d6a7754bd37d2c08/out/parse.rs:3085:5
[INFO] [stdout]      |
[INFO] [stdout] 3085 |     (__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/lalrpop-lambda-d6a7754bd37d2c08/out/parse.rs:3096:5
[INFO] [stdout]      |
[INFO] [stdout] 3096 |     (__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/lalrpop-lambda-d6a7754bd37d2c08/out/parse.rs:3201:5
[INFO] [stdout]      |
[INFO] [stdout] 3201 |     (__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/lalrpop-lambda-d6a7754bd37d2c08/out/parse.rs:3235:5
[INFO] [stdout]      |
[INFO] [stdout] 3235 |     (__0)
[INFO] [stdout]      |     ^^^^^ help: remove these parentheses
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: identifier pair considered confusable between `γ` and `y`
[INFO] [stdout]   --> examples/macros.rs:45:27
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let one = λ!{f.λ!{x.γ!(f, x)}};
[INFO] [stdout]    |                         - this is where the previous identifier occurred
[INFO] [stdout] ...
[INFO] [stdout] 45 |     println!("{}", abs!{x y.app!(x,y)});
[INFO] [stdout]    |                           ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(confusable_idents)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3m 01s
[INFO] running `Command { std: "docker" "inspect" "9d56982d58c9b2c82816e4a716bb0085300cbffbf150a74fb008df9961f376dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9d56982d58c9b2c82816e4a716bb0085300cbffbf150a74fb008df9961f376dc", kill_on_drop: false }`
[INFO] [stdout] 9d56982d58c9b2c82816e4a716bb0085300cbffbf150a74fb008df9961f376dc