[INFO] cloning repository https://github.com/AR2202/RustySKI
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/AR2202/RustySKI" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAR2202%2FRustySKI", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAR2202%2FRustySKI'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ad22a5e8940362a1425e17e1457427055a48fd69
[INFO] checking AR2202/RustySKI/ad22a5e8940362a1425e17e1457427055a48fd69 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FAR2202%2FRustySKI" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/AR2202/RustySKI on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/AR2202/RustySKI
[INFO] finished tweaking git repo https://github.com/AR2202/RustySKI
[INFO] tweaked toml for git repo https://github.com/AR2202/RustySKI written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/AR2202/RustySKI already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] fc2478a38102981f50b72867181966303a6d446e29e9974f2808cb4aa41bc1de
[INFO] running `Command { std: "docker" "start" "-a" "fc2478a38102981f50b72867181966303a6d446e29e9974f2808cb4aa41bc1de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fc2478a38102981f50b72867181966303a6d446e29e9974f2808cb4aa41bc1de", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fc2478a38102981f50b72867181966303a6d446e29e9974f2808cb4aa41bc1de", kill_on_drop: false }`
[INFO] [stdout] fc2478a38102981f50b72867181966303a6d446e29e9974f2808cb4aa41bc1de
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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 -Dtail_expr_drop_order" "-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b5f5cc69eb9da7710157e6aa1f387232b6b7f19fe509f4d7da31200994aa8b6a
[INFO] running `Command { std: "docker" "start" "-a" "b5f5cc69eb9da7710157e6aa1f387232b6b7f19fe509f4d7da31200994aa8b6a", kill_on_drop: false }`
[INFO] [stderr]     Checking RustySKI v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/eval.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/ast.rs:30:30
[INFO] [stdout]    |
[INFO] [stdout] 30 |             SKI::Application(x) => write!(f, "{:?}({:?})", self.combinator, self.arg),
[INFO] [stdout]    |                              ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/parser.rs:55:19
[INFO] [stdout]    |
[INFO] [stdout] 55 |         .filter(|(i, c)| *c == '(')
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/parser.rs:56:19
[INFO] [stdout]    |
[INFO] [stdout] 56 |         .map(|(i, c)| i)
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/parser.rs:60:19
[INFO] [stdout]    |
[INFO] [stdout] 60 |         .filter(|(i, c)| *c == ')')
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/parser.rs:61:19
[INFO] [stdout]    |
[INFO] [stdout] 61 |         .map(|(i, c)| i)
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: crate `RustySKI` should have a snake case name
[INFO] [stdout]   |
[INFO] [stdout]   = help: convert the identifier to snake case: `rusty_ski`
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/ast.rs:30:30
[INFO] [stdout]    |
[INFO] [stdout] 30 |             SKI::Application(x) => write!(f, "{:?}({:?})", self.combinator, self.arg),
[INFO] [stdout]    |                              ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/parser.rs:55:19
[INFO] [stdout]    |
[INFO] [stdout] 55 |         .filter(|(i, c)| *c == '(')
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/parser.rs:56:19
[INFO] [stdout]    |
[INFO] [stdout] 56 |         .map(|(i, c)| i)
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `i`
[INFO] [stdout]   --> src/parser.rs:60:19
[INFO] [stdout]    |
[INFO] [stdout] 60 |         .filter(|(i, c)| *c == ')')
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_i`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> src/parser.rs:61:19
[INFO] [stdout]    |
[INFO] [stdout] 61 |         .map(|(i, c)| i)
[INFO] [stdout]    |                   ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.55s
[INFO] running `Command { std: "docker" "inspect" "b5f5cc69eb9da7710157e6aa1f387232b6b7f19fe509f4d7da31200994aa8b6a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b5f5cc69eb9da7710157e6aa1f387232b6b7f19fe509f4d7da31200994aa8b6a", kill_on_drop: false }`
[INFO] [stdout] b5f5cc69eb9da7710157e6aa1f387232b6b7f19fe509f4d7da31200994aa8b6a