[INFO] fetching crate abstract-calculus 0.1.5...
[INFO] checking abstract-calculus-0.1.5 against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] extracting crate abstract-calculus 0.1.5 into /workspace/builds/worker-12/source
[INFO] validating manifest of crates.io crate abstract-calculus 0.1.5 on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking crates.io crate abstract-calculus 0.1.5
[INFO] finished tweaking crates.io crate abstract-calculus 0.1.5
[INFO] tweaked toml for crates.io crate abstract-calculus 0.1.5 written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update"`
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"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" "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" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "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] 851ff9e153ecddb0313775bceefbee1017f7c8b436e0a500c2c5b2214d43ab6d
[INFO] running `"docker" "start" "-a" "851ff9e153ecddb0313775bceefbee1017f7c8b436e0a500c2c5b2214d43ab6d"`
[INFO] [stderr]     Checking abstract-calculus v0.1.5 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/term.rs:429:35
[INFO] [stderr]     |
[INFO] [stderr] 429 |         , lets_set : &mut HashSet<(u32)>
[INFO] [stderr]     |                                   ^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/term.rs:429:35
[INFO] [stderr]     |
[INFO] [stderr] 429 |         , lets_set : &mut HashSet<(u32)>
[INFO] [stderr]     |                                   ^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:208:37
[INFO] [stderr]     |
[INFO] [stderr] 208 | ...                   let mut name = nam.clone().to_vec();
[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: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:441:25
[INFO] [stderr]     |
[INFO] [stderr] 441 |                     let mut lam = Lam{nam: nam, bod: Box::new(bod)};
[INFO] [stderr]     |                         ----^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:208:37
[INFO] [stderr]     |
[INFO] [stderr] 208 | ...                   let mut name = nam.clone().to_vec();
[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: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:441:25
[INFO] [stderr]     |
[INFO] [stderr] 441 |                     let mut lam = Lam{nam: nam, bod: Box::new(bod)};
[INFO] [stderr]     |                         ----^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/term.rs:429:35
[INFO] [stderr]     |
[INFO] [stderr] 429 |         , lets_set : &mut HashSet<(u32)>
[INFO] [stderr]     |                                   ^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/term.rs:429:35
[INFO] [stderr]     |
[INFO] [stderr] 429 |         , lets_set : &mut HashSet<(u32)>
[INFO] [stderr]     |                                   ^^^^^ help: remove these parentheses
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_parens)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:208:37
[INFO] [stderr]     |
[INFO] [stderr] 208 | ...                   let mut name = nam.clone().to_vec();
[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: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:441:25
[INFO] [stderr]     |
[INFO] [stderr] 441 |                     let mut lam = Lam{nam: nam, bod: Box::new(bod)};
[INFO] [stderr]     |                         ----^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:208:37
[INFO] [stderr]     |
[INFO] [stderr] 208 | ...                   let mut name = nam.clone().to_vec();
[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: variable does not need to be mutable
[INFO] [stderr]    --> src/term.rs:441:25
[INFO] [stderr]     |
[INFO] [stderr] 441 |                     let mut lam = Lam{nam: nam, bod: Box::new(bod)};
[INFO] [stderr]     |                         ----^^^
[INFO] [stderr]     |                         |
[INFO] [stderr]     |                         help: remove this `mut`
[INFO] [stderr] 
[INFO] [stderr] warning: 3 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.20s
[INFO] running `"docker" "inspect" "851ff9e153ecddb0313775bceefbee1017f7c8b436e0a500c2c5b2214d43ab6d"`
[INFO] running `"docker" "rm" "-f" "851ff9e153ecddb0313775bceefbee1017f7c8b436e0a500c2c5b2214d43ab6d"`
[INFO] [stdout] 851ff9e153ecddb0313775bceefbee1017f7c8b436e0a500c2c5b2214d43ab6d