[INFO] updating cached repository https://github.com/ivoelbert/tigerust
[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/ivoelbert/tigerust
[INFO] [stderr]  * [new branch]      TYPE_LOGGING -> TYPE_LOGGING
[INFO] [stderr]    58b5500..628c267  canonization -> canonization
[INFO] [stderr]  * [new branch]      dependabot/npm_and_yarn/app/acorn-5.7.4 -> dependabot/npm_and_yarn/app/acorn-5.7.4
[INFO] [stderr]    7e5c9c0..b0f5f4b  master       -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] b0f5f4b69b505681764d2e34f74eecba56513025
[INFO] checking ivoelbert/tigerust against master#3dbade652ed8ebac70f903e01f51cd92c4e4302c for pr-69880
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fivoelbert%2Ftigerust" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ivoelbert/tigerust on toolchain 3dbade652ed8ebac70f903e01f51cd92c4e4302c
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/ivoelbert/tigerust
[INFO] finished tweaking git repo https://github.com/ivoelbert/tigerust
[INFO] tweaked toml for git repo https://github.com/ivoelbert/tigerust written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/ivoelbert/tigerust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+3dbade652ed8ebac70f903e01f51cd92c4e4302c" "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] cc18d44bb74f4bd1670d4df6e4aaa28852d33d87883c0c63ad3a0558b1f43508
[INFO] running `"docker" "start" "-a" "cc18d44bb74f4bd1670d4df6e4aaa28852d33d87883c0c63ad3a0558b1f43508"`
[INFO] [stderr]    Compiling syn v0.15.39
[INFO] [stderr]    Compiling serde v1.0.94
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.34
[INFO] [stderr]    Compiling wasm-bindgen v0.2.34
[INFO] [stderr]    Compiling ucd-util v0.1.5
[INFO] [stderr]    Compiling byte-tools v0.3.1
[INFO] [stderr]    Compiling utf8-ranges v1.0.3
[INFO] [stderr]    Compiling fixedbitset v0.1.9
[INFO] [stderr]    Compiling either v1.5.2
[INFO] [stderr]    Compiling bit-vec v0.5.1
[INFO] [stderr]    Compiling fake-simd v0.1.2
[INFO] [stderr]    Compiling precomputed-hash v0.1.1
[INFO] [stderr]    Compiling opaque-debug v0.2.2
[INFO] [stderr]    Compiling ordermap v0.3.5
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.3
[INFO] [stderr]    Compiling diff v0.1.11
[INFO] [stderr]    Compiling lalrpop-util v0.17.1
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]    Compiling block-padding v0.1.4
[INFO] [stderr]     Checking itertools v0.8.0
[INFO] [stderr]    Compiling libc v0.2.58
[INFO] [stderr]    Compiling typenum v1.10.0
[INFO] [stderr]    Compiling regex-syntax v0.6.10
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]    Compiling aho-corasick v0.7.4
[INFO] [stderr]    Compiling bit-set v0.5.1
[INFO] [stderr]    Compiling ena v0.13.0
[INFO] [stderr]    Compiling wasm-bindgen-test-macro v0.2.34
[INFO] [stderr]    Compiling petgraph v0.4.13
[INFO] [stderr]    Compiling generic-array v0.12.3
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling dirs v1.0.5
[INFO] [stderr]    Compiling atty v0.2.11
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling term v0.5.2
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling digest v0.8.0
[INFO] [stderr]     Checking nanoid v0.2.0
[INFO] [stderr]     Checking pathfinding v1.1.12
[INFO] [stderr]    Compiling sha2 v0.8.0
[INFO] [stderr]    Compiling ascii-canvas v2.0.0
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling string_cache_codegen v0.4.2
[INFO] [stderr]    Compiling regex v1.2.0
[INFO] [stderr]    Compiling string_cache v0.7.3
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.34
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.34
[INFO] [stderr]    Compiling serde_derive v1.0.94
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.34
[INFO] [stderr]     Checking serde_json v1.0.42
[INFO] [stderr]     Checking snowflake v1.3.0
[INFO] [stderr]    Compiling docopt v1.1.0
[INFO] [stderr]    Compiling lalrpop v0.17.1
[INFO] [stderr]     Checking js-sys v0.3.11
[INFO] [stderr]     Checking console_error_panic_hook v0.1.5
[INFO] [stderr]     Checking wasm-bindgen-futures v0.3.11
[INFO] [stderr]     Checking wasm-bindgen-test v0.2.34
[INFO] [stderr]    Compiling tigerust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:3851:5
[INFO] [stderr]      |
[INFO] [stderr] 3851 |     (__0)
[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 block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:3919:5
[INFO] [stderr]      |
[INFO] [stderr] 3919 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:3968:5
[INFO] [stderr]      |
[INFO] [stderr] 3968 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:3989:5
[INFO] [stderr]      |
[INFO] [stderr] 3989 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:4018:5
[INFO] [stderr]      |
[INFO] [stderr] 4018 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:4044:5
[INFO] [stderr]      |
[INFO] [stderr] 4044 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:4072:5
[INFO] [stderr]      |
[INFO] [stderr] 4072 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:4114:5
[INFO] [stderr]      |
[INFO] [stderr] 4114 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:4135:5
[INFO] [stderr]      |
[INFO] [stderr] 4135 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:4204:5
[INFO] [stderr]      |
[INFO] [stderr] 4204 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:4241:5
[INFO] [stderr]      |
[INFO] [stderr] 4241 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:4278:5
[INFO] [stderr]      |
[INFO] [stderr] 4278 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:4434:5
[INFO] [stderr]      |
[INFO] [stderr] 4434 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:4459:5
[INFO] [stderr]      |
[INFO] [stderr] 4459 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:4640:5
[INFO] [stderr]      |
[INFO] [stderr] 4640 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:4648:5
[INFO] [stderr]      |
[INFO] [stderr] 4648 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::utils::log`
[INFO] [stderr]  --> src/typecheck/mod.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use crate::utils::log;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::utils::log`
[INFO] [stderr]  --> src/typecheck/opexp.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::utils::log;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/typecheck/letexp.rs:283:55
[INFO] [stderr]     |
[INFO] [stderr] 283 |     fn sort_decs(decs: &[(_TypeDec, Pos)], order: Vec<(Symbol)>, record_names: Vec<(Symbol)>) -> (Vec<&(_TypeDec, Pos)>, Vec<&(_TypeDec, Pos)>) {
[INFO] [stderr]     |                                                       ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/typecheck/letexp.rs:283:84
[INFO] [stderr]     |
[INFO] [stderr] 283 |     fn sort_decs(decs: &[(_TypeDec, Pos)], order: Vec<(Symbol)>, record_names: Vec<(Symbol)>) -> (Vec<&(_TypeDec, Pos)>, Vec<&(_TypeDec, Pos)>) {
[INFO] [stderr]     |                                                                                    ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::utils::log`
[INFO] [stderr]  --> src/tree/escape.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::utils::log;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::utils::log`
[INFO] [stderr]  --> src/tree/translate/mod.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::utils::log;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::utils::log`
[INFO] [stderr]  --> src/tree/translate/callexp.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::utils::log;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::utils::log`
[INFO] [stderr]  --> src/tree/translate/opexp.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::utils::log;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::utils::log`
[INFO] [stderr]  --> src/tree/translate/seqexp.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::utils::log;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/tree/translate/mod.rs:92:38
[INFO] [stderr]    |
[INFO] [stderr] 92 | pub fn translate(exp: AST) -> Result<(Vec<Fragment>), TransError> {
[INFO] [stderr]    |                                      ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::utils::log`
[INFO] [stderr]   --> src/tree/level.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | use crate::utils::log;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Tree::*`
[INFO] [stderr]  --> src/canonization/mod.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use Tree::*;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `frame::Frame`
[INFO] [stderr]   --> src/canonization/mod.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use frame::Frame;
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:3851:5
[INFO] [stderr]      |
[INFO] [stderr] 3851 |     (__0)
[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 block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:3919:5
[INFO] [stderr]      |
[INFO] [stderr] 3919 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:3968:5
[INFO] [stderr]      |
[INFO] [stderr] 3968 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:3989:5
[INFO] [stderr]      |
[INFO] [stderr] 3989 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:4018:5
[INFO] [stderr]      |
[INFO] [stderr] 4018 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:4044:5
[INFO] [stderr]      |
[INFO] [stderr] 4044 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:4072:5
[INFO] [stderr]      |
[INFO] [stderr] 4072 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:4114:5
[INFO] [stderr]      |
[INFO] [stderr] 4114 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:4135:5
[INFO] [stderr]      |
[INFO] [stderr] 4135 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:4204:5
[INFO] [stderr]      |
[INFO] [stderr] 4204 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:4241:5
[INFO] [stderr]      |
[INFO] [stderr] 4241 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:4278:5
[INFO] [stderr]      |
[INFO] [stderr] 4278 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:4434:5
[INFO] [stderr]      |
[INFO] [stderr] 4434 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:4459:5
[INFO] [stderr]      |
[INFO] [stderr] 4459 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:4640:5
[INFO] [stderr]      |
[INFO] [stderr] 4640 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around block return value
[INFO] [stderr]     --> /opt/rustwide/target/debug/build/tigerust-27601a72f0a3efd5/out/parser.rs:4648:5
[INFO] [stderr]      |
[INFO] [stderr] 4648 |     (__0)
[INFO] [stderr]      |     ^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::utils::log`
[INFO] [stderr]  --> src/typecheck/mod.rs:7:5
[INFO] [stderr]   |
[INFO] [stderr] 7 | use crate::utils::log;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::utils::log`
[INFO] [stderr]  --> src/typecheck/opexp.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use crate::utils::log;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/typecheck/letexp.rs:283:55
[INFO] [stderr]     |
[INFO] [stderr] 283 |     fn sort_decs(decs: &[(_TypeDec, Pos)], order: Vec<(Symbol)>, record_names: Vec<(Symbol)>) -> (Vec<&(_TypeDec, Pos)>, Vec<&(_TypeDec, Pos)>) {
[INFO] [stderr]     |                                                       ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]    --> src/typecheck/letexp.rs:283:84
[INFO] [stderr]     |
[INFO] [stderr] 283 |     fn sort_decs(decs: &[(_TypeDec, Pos)], order: Vec<(Symbol)>, record_names: Vec<(Symbol)>) -> (Vec<&(_TypeDec, Pos)>, Vec<&(_TypeDec, Pos)>) {
[INFO] [stderr]     |                                                                                    ^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::utils::log`
[INFO] [stderr]  --> src/tree/escape.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::utils::log;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::utils::log`
[INFO] [stderr]  --> src/tree/translate/mod.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::utils::log;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::utils::log`
[INFO] [stderr]  --> src/tree/translate/callexp.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::utils::log;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::utils::log`
[INFO] [stderr]  --> src/tree/translate/opexp.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::utils::log;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::utils::log`
[INFO] [stderr]  --> src/tree/translate/seqexp.rs:3:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | use crate::utils::log;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary parentheses around type
[INFO] [stderr]   --> src/tree/translate/mod.rs:92:38
[INFO] [stderr]    |
[INFO] [stderr] 92 | pub fn translate(exp: AST) -> Result<(Vec<Fragment>), TransError> {
[INFO] [stderr]    |                                      ^^^^^^^^^^^^^^^ help: remove these parentheses
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `crate::utils::log`
[INFO] [stderr]   --> src/tree/level.rs:12:5
[INFO] [stderr]    |
[INFO] [stderr] 12 | use crate::utils::log;
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `Tree::*`
[INFO] [stderr]  --> src/canonization/mod.rs:9:5
[INFO] [stderr]   |
[INFO] [stderr] 9 | use Tree::*;
[INFO] [stderr]   |     ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `frame::Frame`
[INFO] [stderr]   --> src/canonization/mod.rs:10:5
[INFO] [stderr]    |
[INFO] [stderr] 10 | use frame::Frame;
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `linear_trees`
[INFO] [stderr]  --> src/canonization/basic_blocks.rs:4:21
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn basic_blocks(linear_trees: Vec<Tree::Stm>) -> (Vec<Vec<Tree::Stm>>, Label) {
[INFO] [stderr]   |                     ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_linear_trees`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `basic_blocks`
[INFO] [stderr]  --> src/canonization/trace_schedule.rs:5:23
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn trace_schedule(basic_blocks: (Vec<Vec<Tree::Stm>>, Label)) -> Vec<Tree::Stm> {
[INFO] [stderr]   |                       ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_basic_blocks`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `linear_trees`
[INFO] [stderr]  --> src/canonization/basic_blocks.rs:4:21
[INFO] [stderr]   |
[INFO] [stderr] 4 | pub fn basic_blocks(linear_trees: Vec<Tree::Stm>) -> (Vec<Vec<Tree::Stm>>, Label) {
[INFO] [stderr]   |                     ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_linear_trees`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `basic_blocks`
[INFO] [stderr]  --> src/canonization/trace_schedule.rs:5:23
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn trace_schedule(basic_blocks: (Vec<Vec<Tree::Stm>>, Label)) -> Vec<Tree::Stm> {
[INFO] [stderr]   |                       ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_basic_blocks`
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `bind_by_move_pattern_guards` has been stable since 1.39.0 and no longer requires an attribute to enable
[INFO] [stderr]   --> src/lib.rs:17:12
[INFO] [stderr]    |
[INFO] [stderr] 17 | #![feature(bind_by_move_pattern_guards)]
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: the feature `bind_by_move_pattern_guards` has been stable since 1.39.0 and no longer requires an attribute to enable
[INFO] [stderr]   --> src/lib.rs:17:12
[INFO] [stderr]    |
[INFO] [stderr] 17 | #![feature(bind_by_move_pattern_guards)]
[INFO] [stderr]    |            ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(stable_features)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2m 25s
[INFO] running `"docker" "inspect" "cc18d44bb74f4bd1670d4df6e4aaa28852d33d87883c0c63ad3a0558b1f43508"`
[INFO] running `"docker" "rm" "-f" "cc18d44bb74f4bd1670d4df6e4aaa28852d33d87883c0c63ad3a0558b1f43508"`
[INFO] [stdout] cc18d44bb74f4bd1670d4df6e4aaa28852d33d87883c0c63ad3a0558b1f43508