[INFO] updating cached repository https://github.com/MichaelObvious/opsc
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] [stderr] From https://github.com/MichaelObvious/opsc
[INFO] [stderr]    93db5a0..fc478c0  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] fc478c061a2c43b9fd79b83a13f27c9c9bec0a59
[INFO] checking MichaelObvious/opsc against master#e2223c94bf433fc38234d1303e88cbaf14755863 for pr-69548
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FMichaelObvious%2Fopsc" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/MichaelObvious/opsc on toolchain e2223c94bf433fc38234d1303e88cbaf14755863
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e2223c94bf433fc38234d1303e88cbaf14755863" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/MichaelObvious/opsc
[INFO] finished tweaking git repo https://github.com/MichaelObvious/opsc
[INFO] tweaked toml for git repo https://github.com/MichaelObvious/opsc written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/MichaelObvious/opsc already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e2223c94bf433fc38234d1303e88cbaf14755863" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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" "MAP_USER_ID=0" "-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" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+e2223c94bf433fc38234d1303e88cbaf14755863" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] f257a5d27ae89313ec3db854a0595706363ffc615b889e6329c26a92126bb393
[INFO] running `"docker" "start" "-a" "f257a5d27ae89313ec3db854a0595706363ffc615b889e6329c26a92126bb393"`
[INFO] [stderr]     Checking opsc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `returns`
[INFO] [stderr]    --> src/parser/parser.rs:171:17
[INFO] [stderr]     |
[INFO] [stderr] 171 |         let mut returns: Vec<Expression> = Vec::new();
[INFO] [stderr]     |                 ^^^^^^^ help: consider prefixing with an underscore: `_returns`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pmatch`
[INFO] [stderr]    --> src/parser/parser.rs:173:17
[INFO] [stderr]     |
[INFO] [stderr] 173 |         let mut pmatch: Option<Expression>;
[INFO] [stderr]     |                 ^^^^^^ help: consider prefixing with an underscore: `_pmatch`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `condition`
[INFO] [stderr]    --> src/parser/parser.rs:174:17
[INFO] [stderr]     |
[INFO] [stderr] 174 |         let mut condition: Option<Expression>;
[INFO] [stderr]     |                 ^^^^^^^^^ help: consider prefixing with an underscore: `_condition`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `expr`
[INFO] [stderr]    --> src/parser/parser.rs:175:17
[INFO] [stderr]     |
[INFO] [stderr] 175 |         let mut expr: Option<Expression>;
[INFO] [stderr]     |                 ^^^^ help: consider prefixing with an underscore: `_expr`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/parser/parser.rs:171:13
[INFO] [stderr]     |
[INFO] [stderr] 171 |         let mut returns: Vec<Expression> = Vec::new();
[INFO] [stderr]     |             ----^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `returns`
[INFO] [stderr]    --> src/parser/parser.rs:171:17
[INFO] [stderr]     |
[INFO] [stderr] 171 |         let mut returns: Vec<Expression> = Vec::new();
[INFO] [stderr]     |                 ^^^^^^^ help: consider prefixing with an underscore: `_returns`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Import`
[INFO] [stderr]   --> src/ast/ast.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     Import(Vec<Expression>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `pmatch`
[INFO] [stderr]    --> src/parser/parser.rs:173:17
[INFO] [stderr]     |
[INFO] [stderr] 173 |         let mut pmatch: Option<Expression>;
[INFO] [stderr]     |                 ^^^^^^ help: consider prefixing with an underscore: `_pmatch`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `condition`
[INFO] [stderr]    --> src/parser/parser.rs:174:17
[INFO] [stderr]     |
[INFO] [stderr] 174 |         let mut condition: Option<Expression>;
[INFO] [stderr]     |                 ^^^^^^^^^ help: consider prefixing with an underscore: `_condition`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `expr`
[INFO] [stderr]    --> src/parser/parser.rs:175:17
[INFO] [stderr]     |
[INFO] [stderr] 175 |         let mut expr: Option<Expression>;
[INFO] [stderr]     |                 ^^^^ help: consider prefixing with an underscore: `_expr`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `SetComprehension`
[INFO] [stderr]   --> src/ast/ast.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     SetComprehension(Box<Expression>, Box<Expression>, Box<Expression>, Option<Box<Expression>>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Return`
[INFO] [stderr]   --> src/ast/ast.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 57 |     Return(Option<Box<Expression>>, Option<Box<Expression>>, Box<Expression>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Set`
[INFO] [stderr]   --> src/ast/types.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     Set(Box<Type>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/parser/parser.rs:171:13
[INFO] [stderr]     |
[INFO] [stderr] 171 |         let mut returns: Vec<Expression> = Vec::new();
[INFO] [stderr]     |             ----^^^^^^^
[INFO] [stderr]     |             |
[INFO] [stderr]     |             help: remove this `mut`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Import`
[INFO] [stderr]   --> src/ast/ast.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     Import(Vec<Expression>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `SetComprehension`
[INFO] [stderr]   --> src/ast/ast.rs:45:5
[INFO] [stderr]    |
[INFO] [stderr] 45 |     SetComprehension(Box<Expression>, Box<Expression>, Box<Expression>, Option<Box<Expression>>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Return`
[INFO] [stderr]   --> src/ast/ast.rs:57:5
[INFO] [stderr]    |
[INFO] [stderr] 57 |     Return(Option<Box<Expression>>, Option<Box<Expression>>, Box<Expression>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Set`
[INFO] [stderr]   --> src/ast/types.rs:17:5
[INFO] [stderr]    |
[INFO] [stderr] 17 |     Set(Box<Type>),
[INFO] [stderr]    |     ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.21s
[INFO] running `"docker" "inspect" "f257a5d27ae89313ec3db854a0595706363ffc615b889e6329c26a92126bb393"`
[INFO] running `"docker" "rm" "-f" "f257a5d27ae89313ec3db854a0595706363ffc615b889e6329c26a92126bb393"`
[INFO] [stdout] f257a5d27ae89313ec3db854a0595706363ffc615b889e6329c26a92126bb393