[INFO] fetching crate artlr_syntax 0.3.0...
[INFO] checking artlr_syntax-0.3.0 against master#c2f2db79ca3024f68d22b45aa22b570775c2c4ad for pr-124157
[INFO] extracting crate artlr_syntax 0.3.0 into /workspace/builds/worker-2-tc1/source
[INFO] validating manifest of crates.io crate artlr_syntax 0.3.0 on toolchain c2f2db79ca3024f68d22b45aa22b570775c2c4ad
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate artlr_syntax 0.3.0
[INFO] finished tweaking crates.io crate artlr_syntax 0.3.0
[INFO] tweaked toml for crates.io crate artlr_syntax 0.3.0 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a616d474eeb220e09c406721cd9962d3fa34987c048954e08ff13c4d5f7eeea9
[INFO] running `Command { std: "docker" "start" "-a" "a616d474eeb220e09c406721cd9962d3fa34987c048954e08ff13c4d5f7eeea9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a616d474eeb220e09c406721cd9962d3fa34987c048954e08ff13c4d5f7eeea9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a616d474eeb220e09c406721cd9962d3fa34987c048954e08ff13c4d5f7eeea9", kill_on_drop: false }`
[INFO] [stdout] a616d474eeb220e09c406721cd9962d3fa34987c048954e08ff13c4d5f7eeea9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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" "RUSTDOCFLAGS=--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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+c2f2db79ca3024f68d22b45aa22b570775c2c4ad" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 86d3cacedf0d927215bce59700f1fe222d9a524663ebf37ce3b65157e61a4e60
[INFO] running `Command { std: "docker" "start" "-a" "86d3cacedf0d927215bce59700f1fe222d9a524663ebf37ce3b65157e61a4e60", kill_on_drop: false }`
[INFO] [stderr]     Checking artlr_syntax v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/grammar/first_follow_symbols.rs:296:45
[INFO] [stdout]     |
[INFO] [stdout] 296 |                 .get(output_symbol).unwrap().borrow();
[INFO] [stdout]     |                                             ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `HashSet<T>` does not implement `Borrow`, so calling `borrow` on `&HashSet<T>` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 296 -                 .get(output_symbol).unwrap().borrow();
[INFO] [stdout] 296 +                 .get(output_symbol).unwrap();
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/grammar/first_follow_symbols.rs:296:45
[INFO] [stdout]     |
[INFO] [stdout] 296 |                 .get(output_symbol).unwrap().borrow();
[INFO] [stdout]     |                                             ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `HashSet<T>` does not implement `Borrow`, so calling `borrow` on `&HashSet<T>` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 296 -                 .get(output_symbol).unwrap().borrow();
[INFO] [stdout] 296 +                 .get(output_symbol).unwrap();
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.36s
[INFO] running `Command { std: "docker" "inspect" "86d3cacedf0d927215bce59700f1fe222d9a524663ebf37ce3b65157e61a4e60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "86d3cacedf0d927215bce59700f1fe222d9a524663ebf37ce3b65157e61a4e60", kill_on_drop: false }`
[INFO] [stdout] 86d3cacedf0d927215bce59700f1fe222d9a524663ebf37ce3b65157e61a4e60
[INFO] checking artlr_syntax-0.3.0 against try#9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88 for pr-124157
[INFO] extracting crate artlr_syntax 0.3.0 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate artlr_syntax 0.3.0 on toolchain 9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate artlr_syntax 0.3.0
[INFO] finished tweaking crates.io crate artlr_syntax 0.3.0
[INFO] tweaked toml for crates.io crate artlr_syntax 0.3.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bd88554c02dc7b0848816d9588f9bc6f539064684ee1edab8231544afa1eedc3
[INFO] running `Command { std: "docker" "start" "-a" "bd88554c02dc7b0848816d9588f9bc6f539064684ee1edab8231544afa1eedc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bd88554c02dc7b0848816d9588f9bc6f539064684ee1edab8231544afa1eedc3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bd88554c02dc7b0848816d9588f9bc6f539064684ee1edab8231544afa1eedc3", kill_on_drop: false }`
[INFO] [stdout] bd88554c02dc7b0848816d9588f9bc6f539064684ee1edab8231544afa1eedc3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "RUSTDOCFLAGS=--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@sha256:99613afd962a8cfa530ec1899472a458bd015a1ab0af876cf7eb06f6006d81ea" "/opt/rustwide/cargo-home/bin/cargo" "+9c7b5f5b6b8ec32bbbcf9f07fc0e5208da6c5f88" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] c2550678dc350fde65195e4b2badc2528a78b23c386be844c5709ea3d45c2d1d
[INFO] running `Command { std: "docker" "start" "-a" "c2550678dc350fde65195e4b2badc2528a78b23c386be844c5709ea3d45c2d1d", kill_on_drop: false }`
[INFO] [stderr]     Checking artlr_syntax v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/grammar/first_follow_symbols.rs:296:45
[INFO] [stdout]     |
[INFO] [stdout] 296 |                 .get(output_symbol).unwrap().borrow();
[INFO] [stdout]     |                                             ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `HashSet<T>` does not implement `Borrow`, so calling `borrow` on `&HashSet<T>` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 296 -                 .get(output_symbol).unwrap().borrow();
[INFO] [stdout] 296 +                 .get(output_symbol).unwrap();
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: call to `.borrow()` on a reference in this situation does nothing
[INFO] [stdout]    --> src/grammar/first_follow_symbols.rs:296:45
[INFO] [stdout]     |
[INFO] [stdout] 296 |                 .get(output_symbol).unwrap().borrow();
[INFO] [stdout]     |                                             ^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: the type `HashSet<T>` does not implement `Borrow`, so calling `borrow` on `&HashSet<T>` copies the reference, which does not do anything and can be removed
[INFO] [stdout]     = note: `#[warn(noop_method_call)]` on by default
[INFO] [stdout] help: remove this redundant call
[INFO] [stdout]     |
[INFO] [stdout] 296 -                 .get(output_symbol).unwrap().borrow();
[INFO] [stdout] 296 +                 .get(output_symbol).unwrap();
[INFO] [stdout]     |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.24s
[INFO] running `Command { std: "docker" "inspect" "c2550678dc350fde65195e4b2badc2528a78b23c386be844c5709ea3d45c2d1d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c2550678dc350fde65195e4b2badc2528a78b23c386be844c5709ea3d45c2d1d", kill_on_drop: false }`
[INFO] [stdout] c2550678dc350fde65195e4b2badc2528a78b23c386be844c5709ea3d45c2d1d
