Nov 28 08:00:29.179 INFO checking cdouglass/samara against try#db42d4dad33013eba11ef37342ad9f614e5652b8 for pr-56074
Nov 28 08:00:29.181 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56074/worker-4/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-4/pr-56074/try#db42d4dad33013eba11ef37342ad9f614e5652b8:/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 +db42d4dad33013eba11ef37342ad9f614e5652b8-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"`
Nov 28 08:00:29.531 INFO [stdout] 37695da2286ff4dd736619199e9a4bd36c6902274e591fe50258682019777c0e
Nov 28 08:00:29.536 INFO running `"docker" "start" "-a" "37695da2286ff4dd736619199e9a4bd36c6902274e591fe50258682019777c0e"`
Nov 28 08:00:30.237 INFO [stderr] usermod: no changes
Nov 28 08:00:30.388 INFO [stderr]    Compiling pulldown-cmark v0.1.0
Nov 28 08:00:30.389 INFO [stderr]    Compiling getopts v0.2.15
Nov 28 08:00:30.390 INFO [stderr]    Compiling error-chain v0.11.0
Nov 28 08:00:30.391 INFO [stderr]    Compiling toml v0.4.5
Nov 28 08:00:30.394 INFO [stderr]    Compiling serde_json v1.0.3
Nov 28 08:00:30.395 INFO [stderr]    Compiling tempdir v0.3.5
Nov 28 08:00:38.161 INFO [stderr]     Checking skeptic v0.13.0
Nov 28 08:00:46.252 INFO [stderr]    Compiling samara v0.1.0 (/source)
Nov 28 08:00:49.600 INFO [stderr] warning: unnecessary parentheses around method argument
Nov 28 08:00:49.600 INFO [stderr]   --> src/structures/patterns.rs:46:46
Nov 28 08:00:49.600 INFO [stderr]    |
Nov 28 08:00:49.600 INFO [stderr] 46 |                   patterns.iter().fold(vec![], (|mut v, pat| {
Nov 28 08:00:49.600 INFO [stderr]    |  ______________________________________________^
Nov 28 08:00:49.600 INFO [stderr] 47 | |                     v.extend(pat.identifiers());
Nov 28 08:00:49.600 INFO [stderr] 48 | |                     v}))
Nov 28 08:00:49.600 INFO [stderr]    | |_______________________^
Nov 28 08:00:49.600 INFO [stderr]    |
Nov 28 08:00:49.600 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Nov 28 08:00:49.600 INFO [stderr] help: remove these parentheses
Nov 28 08:00:49.600 INFO [stderr]    |
Nov 28 08:00:49.600 INFO [stderr] 46 |                 patterns.iter().fold(vec![], |mut v, pat| {
Nov 28 08:00:49.600 INFO [stderr] 47 |                     v.extend(pat.identifiers());
Nov 28 08:00:49.600 INFO [stderr] 48 |                     v})
Nov 28 08:00:49.600 INFO [stderr]    |
Nov 28 08:00:49.600 INFO [stderr] 
Nov 28 08:00:49.783 INFO [stderr] warning: unnecessary parentheses around method argument
Nov 28 08:00:49.784 INFO [stderr]   --> src/structures/patterns.rs:46:46
Nov 28 08:00:49.784 INFO [stderr]    |
Nov 28 08:00:49.784 INFO [stderr] 46 |                   patterns.iter().fold(vec![], (|mut v, pat| {
Nov 28 08:00:49.785 INFO [stderr]    |  ______________________________________________^
Nov 28 08:00:49.785 INFO [stderr] 47 | |                     v.extend(pat.identifiers());
Nov 28 08:00:49.785 INFO [stderr] 48 | |                     v}))
Nov 28 08:00:49.785 INFO [stderr]    | |_______________________^
Nov 28 08:00:49.786 INFO [stderr]    |
Nov 28 08:00:49.786 INFO [stderr]    = note: #[warn(unused_parens)] on by default
Nov 28 08:00:49.786 INFO [stderr] help: remove these parentheses
Nov 28 08:00:49.787 INFO [stderr]    |
Nov 28 08:00:49.787 INFO [stderr] 46 |                 patterns.iter().fold(vec![], |mut v, pat| {
Nov 28 08:00:49.787 INFO [stderr] 47 |                     v.extend(pat.identifiers());
Nov 28 08:00:49.787 INFO [stderr] 48 |                     v})
Nov 28 08:00:49.788 INFO [stderr]    |
Nov 28 08:00:49.788 INFO [stderr] 
Nov 28 08:00:49.788 INFO [stderr] warning: unnecessary parentheses around function argument
Nov 28 08:00:49.789 INFO [stderr]    --> src/parse/decl.rs:199:67
Nov 28 08:00:49.789 INFO [stderr]     |
Nov 28 08:00:49.789 INFO [stderr] 199 |         assert_parses_type("Int -> Bool -> Int", arrow(Type::Int, (arrow(Type::Bool, Type::Int))));
Nov 28 08:00:49.790 INFO [stderr]     |                                                                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these parentheses
Nov 28 08:00:49.790 INFO [stderr] 
Nov 28 08:00:51.248 INFO [stderr] warning: variable does not need to be mutable
Nov 28 08:00:51.248 INFO [stderr]   --> src/tests.rs:14:38
Nov 28 08:00:51.248 INFO [stderr]    |
Nov 28 08:00:51.248 INFO [stderr] 14 | fn assert_evaluation_err(expr: &str, mut bindings: &mut Vec<LetBinding>, mut gen: &mut GenTypeVar, msg: &str) {
Nov 28 08:00:51.248 INFO [stderr]    |                                      ----^^^^^^^^
Nov 28 08:00:51.248 INFO [stderr]    |                                      |
Nov 28 08:00:51.248 INFO [stderr]    |                                      help: remove this `mut`
Nov 28 08:00:51.248 INFO [stderr]    |
Nov 28 08:00:51.248 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Nov 28 08:00:51.248 INFO [stderr] 
Nov 28 08:00:51.249 INFO [stderr] warning: variable does not need to be mutable
Nov 28 08:00:51.249 INFO [stderr]   --> src/tests.rs:14:74
Nov 28 08:00:51.249 INFO [stderr]    |
Nov 28 08:00:51.249 INFO [stderr] 14 | fn assert_evaluation_err(expr: &str, mut bindings: &mut Vec<LetBinding>, mut gen: &mut GenTypeVar, msg: &str) {
Nov 28 08:00:51.249 INFO [stderr]    |                                                                          ----^^^
Nov 28 08:00:51.249 INFO [stderr]    |                                                                          |
Nov 28 08:00:51.249 INFO [stderr]    |                                                                          help: remove this `mut`
Nov 28 08:00:51.249 INFO [stderr] 
Nov 28 08:00:51.249 INFO [stderr] warning: variable does not need to be mutable
Nov 28 08:00:51.249 INFO [stderr]   --> src/tests.rs:24:90
Nov 28 08:00:51.249 INFO [stderr]    |
Nov 28 08:00:51.249 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) {
Nov 28 08:00:51.249 INFO [stderr]    |                                                                                          ----^^^
Nov 28 08:00:51.249 INFO [stderr]    |                                                                                          |
Nov 28 08:00:51.249 INFO [stderr]    |                                                                                          help: remove this `mut`
Nov 28 08:00:51.249 INFO [stderr] 
Nov 28 08:00:51.249 INFO [stderr] warning: variable does not need to be mutable
Nov 28 08:00:51.249 INFO [stderr]   --> src/tests.rs:34:41
Nov 28 08:00:51.249 INFO [stderr]    |
Nov 28 08:00:51.249 INFO [stderr] 34 | fn assert_evaluates_to_atom(expr: &str, mut bindings: &mut Vec<LetBinding>, mut gen: &mut GenTypeVar, expected: Atom) {
Nov 28 08:00:51.249 INFO [stderr]    |                                         ----^^^^^^^^
Nov 28 08:00:51.249 INFO [stderr]    |                                         |
Nov 28 08:00:51.249 INFO [stderr]    |                                         help: remove this `mut`
Nov 28 08:00:51.249 INFO [stderr] 
Nov 28 08:00:51.249 INFO [stderr] warning: variable does not need to be mutable
Nov 28 08:00:51.249 INFO [stderr]   --> src/tests.rs:34:77
Nov 28 08:00:51.249 INFO [stderr]    |
Nov 28 08:00:51.249 INFO [stderr] 34 | fn assert_evaluates_to_atom(expr: &str, mut bindings: &mut Vec<LetBinding>, mut gen: &mut GenTypeVar, expected: Atom) {
Nov 28 08:00:51.249 INFO [stderr]    |                                                                             ----^^^
Nov 28 08:00:51.249 INFO [stderr]    |                                                                             |
Nov 28 08:00:51.249 INFO [stderr]    |                                                                             help: remove this `mut`
Nov 28 08:00:51.249 INFO [stderr] 
Nov 28 08:00:51.738 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 21.45s
Nov 28 08:00:51.738 INFO [stderr] su: No module specific data is present
Nov 28 08:00:52.354 INFO running `"docker" "inspect" "37695da2286ff4dd736619199e9a4bd36c6902274e591fe50258682019777c0e"`
Nov 28 08:00:52.682 INFO running `"docker" "rm" "-f" "37695da2286ff4dd736619199e9a4bd36c6902274e591fe50258682019777c0e"`
Nov 28 08:00:52.925 INFO [stdout] 37695da2286ff4dd736619199e9a4bd36c6902274e591fe50258682019777c0e