Dec 11 21:06:03.855 INFO checking cdouglass/samara against try#aa9aa79c3c583aab59ac9134542d60a780c35e2e for pr-56677
Dec 11 21:06:03.855 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-2/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/pr-56677/try#aa9aa79c3c583aab59ac9134542d60a780c35e2e:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +aa9aa79c3c583aab59ac9134542d60a780c35e2e-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 11 21:06:04.083 INFO [stdout] 5c4d74a3bb15645f7f54585fcd5fce0a90252a4c519895079f12842084b9dab3
Dec 11 21:06:04.085 INFO running `"docker" "start" "-a" "5c4d74a3bb15645f7f54585fcd5fce0a90252a4c519895079f12842084b9dab3"`
Dec 11 21:06:04.526 INFO [stderr] usermod: no changes
Dec 11 21:06:04.607 INFO [stderr]    Compiling pulldown-cmark v0.1.0
Dec 11 21:06:04.609 INFO [stderr]    Compiling error-chain v0.11.0
Dec 11 21:06:04.611 INFO [stderr]    Compiling toml v0.4.5
Dec 11 21:06:04.613 INFO [stderr]    Compiling serde_json v1.0.3
Dec 11 21:06:04.614 INFO [stderr]     Checking tempdir v0.3.5
Dec 11 21:06:06.772 INFO [stderr]     Checking skeptic v0.13.0
Dec 11 21:06:17.631 INFO [stderr]    Compiling samara v0.1.0 (/source)
Dec 11 21:06:21.385 INFO [stderr] warning: unnecessary parentheses around method argument
Dec 11 21:06:21.385 INFO [stderr]   --> src/structures/patterns.rs:46:46
Dec 11 21:06:21.385 INFO [stderr]    |
Dec 11 21:06:21.385 INFO [stderr] 46 |                   patterns.iter().fold(vec![], (|mut v, pat| {
Dec 11 21:06:21.386 INFO [stderr]    |  ______________________________________________^
Dec 11 21:06:21.386 INFO [stderr] 47 | |                     v.extend(pat.identifiers());
Dec 11 21:06:21.386 INFO [stderr] 48 | |                     v}))
Dec 11 21:06:21.386 INFO [stderr]    | |_______________________^
Dec 11 21:06:21.386 INFO [stderr]    |
Dec 11 21:06:21.386 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Dec 11 21:06:21.386 INFO [stderr] help: remove these parentheses
Dec 11 21:06:21.386 INFO [stderr]    |
Dec 11 21:06:21.386 INFO [stderr] 46 |                 patterns.iter().fold(vec![], |mut v, pat| {
Dec 11 21:06:21.386 INFO [stderr] 47 |                     v.extend(pat.identifiers());
Dec 11 21:06:21.386 INFO [stderr] 48 |                     v})
Dec 11 21:06:21.386 INFO [stderr]    |
Dec 11 21:06:21.392 INFO [stderr] 
Dec 11 21:06:21.516 INFO [stderr] warning: unnecessary parentheses around method argument
Dec 11 21:06:21.516 INFO [stderr]   --> src/structures/patterns.rs:46:46
Dec 11 21:06:21.516 INFO [stderr]    |
Dec 11 21:06:21.516 INFO [stderr] 46 |                   patterns.iter().fold(vec![], (|mut v, pat| {
Dec 11 21:06:21.516 INFO [stderr]    |  ______________________________________________^
Dec 11 21:06:21.516 INFO [stderr] 47 | |                     v.extend(pat.identifiers());
Dec 11 21:06:21.516 INFO [stderr] 48 | |                     v}))
Dec 11 21:06:21.516 INFO [stderr]    | |_______________________^
Dec 11 21:06:21.516 INFO [stderr]    |
Dec 11 21:06:21.516 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Dec 11 21:06:21.516 INFO [stderr] help: remove these parentheses
Dec 11 21:06:21.516 INFO [stderr]    |
Dec 11 21:06:21.516 INFO [stderr] 46 |                 patterns.iter().fold(vec![], |mut v, pat| {
Dec 11 21:06:21.516 INFO [stderr] 47 |                     v.extend(pat.identifiers());
Dec 11 21:06:21.516 INFO [stderr] 48 |                     v})
Dec 11 21:06:21.516 INFO [stderr]    |
Dec 11 21:06:21.516 INFO [stderr] 
Dec 11 21:06:21.520 INFO [stderr] warning: unnecessary parentheses around function argument
Dec 11 21:06:21.520 INFO [stderr]    --> src/parse/decl.rs:199:67
Dec 11 21:06:21.520 INFO [stderr]     |
Dec 11 21:06:21.520 INFO [stderr] 199 |         assert_parses_type("Int -> Bool -> Int", arrow(Type::Int, (arrow(Type::Bool, Type::Int))));
Dec 11 21:06:21.520 INFO [stderr]     |                                                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Dec 11 21:06:21.520 INFO [stderr] 
Dec 11 21:06:23.357 INFO [stderr] warning: variable does not need to be mutable
Dec 11 21:06:23.358 INFO [stderr]   --> src/tests.rs:14:38
Dec 11 21:06:23.358 INFO [stderr]    |
Dec 11 21:06:23.358 INFO [stderr] 14 | fn assert_evaluation_err(expr: &str, mut bindings: &mut Vec<LetBinding>, mut gen: &mut GenTypeVar, msg: &str) {
Dec 11 21:06:23.358 INFO [stderr]    |                                      ----^^^^^^^^
Dec 11 21:06:23.358 INFO [stderr]    |                                      |
Dec 11 21:06:23.358 INFO [stderr]    |                                      help: remove this `mut`
Dec 11 21:06:23.358 INFO [stderr]    |
Dec 11 21:06:23.358 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 11 21:06:23.358 INFO [stderr] 
Dec 11 21:06:23.358 INFO [stderr] warning: variable does not need to be mutable
Dec 11 21:06:23.358 INFO [stderr]   --> src/tests.rs:14:74
Dec 11 21:06:23.358 INFO [stderr]    |
Dec 11 21:06:23.358 INFO [stderr] 14 | fn assert_evaluation_err(expr: &str, mut bindings: &mut Vec<LetBinding>, mut gen: &mut GenTypeVar, msg: &str) {
Dec 11 21:06:23.358 INFO [stderr]    |                                                                          ----^^^
Dec 11 21:06:23.358 INFO [stderr]    |                                                                          |
Dec 11 21:06:23.358 INFO [stderr]    |                                                                          help: remove this `mut`
Dec 11 21:06:23.358 INFO [stderr] 
Dec 11 21:06:23.360 INFO [stderr] warning: variable does not need to be mutable
Dec 11 21:06:23.360 INFO [stderr]   --> src/tests.rs:24:90
Dec 11 21:06:23.360 INFO [stderr]    |
Dec 11 21:06:23.360 INFO [stderr] 24 | fn assert_evaluates_to_atom_with_context(expr: &str, mut bindings: &mut Vec<LetBinding>, mut gen: &mut GenTypeVar, sum_types: &SumTypeDefs, expected: Atom) {
Dec 11 21:06:23.360 INFO [stderr]    |                                                                                          ----^^^
Dec 11 21:06:23.360 INFO [stderr]    |                                                                                          |
Dec 11 21:06:23.360 INFO [stderr]    |                                                                                          help: remove this `mut`
Dec 11 21:06:23.360 INFO [stderr] 
Dec 11 21:06:23.360 INFO [stderr] warning: variable does not need to be mutable
Dec 11 21:06:23.360 INFO [stderr]   --> src/tests.rs:34:41
Dec 11 21:06:23.360 INFO [stderr]    |
Dec 11 21:06:23.360 INFO [stderr] 34 | fn assert_evaluates_to_atom(expr: &str, mut bindings: &mut Vec<LetBinding>, mut gen: &mut GenTypeVar, expected: Atom) {
Dec 11 21:06:23.360 INFO [stderr]    |                                         ----^^^^^^^^
Dec 11 21:06:23.360 INFO [stderr]    |                                         |
Dec 11 21:06:23.360 INFO [stderr]    |                                         help: remove this `mut`
Dec 11 21:06:23.360 INFO [stderr] 
Dec 11 21:06:23.360 INFO [stderr] warning: variable does not need to be mutable
Dec 11 21:06:23.360 INFO [stderr]   --> src/tests.rs:34:77
Dec 11 21:06:23.360 INFO [stderr]    |
Dec 11 21:06:23.360 INFO [stderr] 34 | fn assert_evaluates_to_atom(expr: &str, mut bindings: &mut Vec<LetBinding>, mut gen: &mut GenTypeVar, expected: Atom) {
Dec 11 21:06:23.360 INFO [stderr]    |                                                                             ----^^^
Dec 11 21:06:23.360 INFO [stderr]    |                                                                             |
Dec 11 21:06:23.360 INFO [stderr]    |                                                                             help: remove this `mut`
Dec 11 21:06:23.360 INFO [stderr] 
Dec 11 21:06:24.714 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.17s
Dec 11 21:06:24.719 INFO [stderr] su: No module specific data is present
Dec 11 21:06:25.356 INFO running `"docker" "inspect" "5c4d74a3bb15645f7f54585fcd5fce0a90252a4c519895079f12842084b9dab3"`
Dec 11 21:06:25.550 INFO running `"docker" "rm" "-f" "5c4d74a3bb15645f7f54585fcd5fce0a90252a4c519895079f12842084b9dab3"`
Dec 11 21:06:25.772 INFO [stdout] 5c4d74a3bb15645f7f54585fcd5fce0a90252a4c519895079f12842084b9dab3