Dec 14 10:43:53.262 INFO testing EdenCao/rust_learning against try#aa49d8ef14939ddec0e34b346b60174a5673d48f for pr-56550
Dec 14 10:43:53.262 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-0/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-alt build --frozen" "-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 14 10:43:53.663 INFO [stdout] 734fc0de1574296525c54f30f30ff6d871be8b2a016382f4d708757e334ee06c
Dec 14 10:43:53.665 INFO running `"docker" "start" "-a" "734fc0de1574296525c54f30f30ff6d871be8b2a016382f4d708757e334ee06c"`
Dec 14 10:43:55.649 INFO [stderr] usermod: no changes
Dec 14 10:43:55.781 INFO [stderr]    Compiling rust_learning v0.1.0 (/source)
Dec 14 10:43:56.761 INFO [stderr] warning: unused variable: `six`
Dec 14 10:43:56.761 INFO [stderr]   --> src/enum.rs:20:7
Dec 14 10:43:56.761 INFO [stderr]    |
Dec 14 10:43:56.761 INFO [stderr] 20 |   let six = IpAddrKind::V6;
Dec 14 10:43:56.761 INFO [stderr]    |       ^^^ help: consider using `_six` instead
Dec 14 10:43:56.761 INFO [stderr]    |
Dec 14 10:43:56.761 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 14 10:43:56.761 INFO [stderr] 
Dec 14 10:43:56.761 INFO [stderr] warning: unused variable: `home`
Dec 14 10:43:56.761 INFO [stderr]   --> src/enum.rs:27:7
Dec 14 10:43:56.761 INFO [stderr]    |
Dec 14 10:43:56.761 INFO [stderr] 27 |   let home = IpAddr {
Dec 14 10:43:56.761 INFO [stderr]    |       ^^^^ help: consider using `_home` instead
Dec 14 10:43:56.761 INFO [stderr] 
Dec 14 10:43:56.761 INFO [stderr] warning: unused variable: `op_type`
Dec 14 10:43:56.761 INFO [stderr]   --> src/enum.rs:35:10
Dec 14 10:43:56.761 INFO [stderr]    |
Dec 14 10:43:56.761 INFO [stderr] 35 | fn route(op_type: IpAddrKind) { }
Dec 14 10:43:56.761 INFO [stderr]    |          ^^^^^^^ help: consider using `_op_type` instead
Dec 14 10:43:56.761 INFO [stderr] 
Dec 14 10:43:56.785 INFO [stderr] warning: field is never used: `kind`
Dec 14 10:43:56.785 INFO [stderr]   --> src/enum.rs:14:3
Dec 14 10:43:56.786 INFO [stderr]    |
Dec 14 10:43:56.786 INFO [stderr] 14 |   kind: IpAddrKind,
Dec 14 10:43:56.786 INFO [stderr]    |   ^^^^^^^^^^^^^^^^
Dec 14 10:43:56.786 INFO [stderr]    |
Dec 14 10:43:56.786 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 14 10:43:56.786 INFO [stderr] 
Dec 14 10:43:56.786 INFO [stderr] warning: field is never used: `address`
Dec 14 10:43:56.786 INFO [stderr]   --> src/enum.rs:15:3
Dec 14 10:43:56.786 INFO [stderr]    |
Dec 14 10:43:56.786 INFO [stderr] 15 |   address: String
Dec 14 10:43:56.786 INFO [stderr]    |   ^^^^^^^^^^^^^^^
Dec 14 10:43:56.786 INFO [stderr] 
Dec 14 10:43:57.755 INFO [stderr] warning: field is never used: `query`
Dec 14 10:43:57.755 INFO [stderr]   --> src/read.rs:27:5
Dec 14 10:43:57.755 INFO [stderr]    |
Dec 14 10:43:57.755 INFO [stderr] 27 |     query: String,
Dec 14 10:43:57.755 INFO [stderr]    |     ^^^^^^^^^^^^^
Dec 14 10:43:57.755 INFO [stderr]    |
Dec 14 10:43:57.755 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 14 10:43:57.755 INFO [stderr] 
Dec 14 10:43:57.755 INFO [stderr] warning: function is never used: `search_case_insensitive`
Dec 14 10:43:57.755 INFO [stderr]   --> src/read.rs:82:1
Dec 14 10:43:57.755 INFO [stderr]    |
Dec 14 10:43:57.755 INFO [stderr] 82 | fn search_case_insensitive<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
Dec 14 10:43:57.755 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 10:43:57.755 INFO [stderr] 
Dec 14 10:44:01.399 INFO [stderr] warning: unused variable: `s6`
Dec 14 10:44:01.399 INFO [stderr]   --> src/owner.rs:19:7
Dec 14 10:44:01.399 INFO [stderr]    |
Dec 14 10:44:01.399 INFO [stderr] 19 |   let s6 = s5;
Dec 14 10:44:01.399 INFO [stderr]    |       ^^ help: consider using `_s6` instead
Dec 14 10:44:01.399 INFO [stderr]    |
Dec 14 10:44:01.399 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 14 10:44:01.399 INFO [stderr] 
Dec 14 10:44:01.459 INFO [stderr] warning: function is never used: `gives_ownership`
Dec 14 10:44:01.459 INFO [stderr]   --> src/owner.rs:37:1
Dec 14 10:44:01.459 INFO [stderr]    |
Dec 14 10:44:01.459 INFO [stderr] 37 | fn gives_ownership() -> String {
Dec 14 10:44:01.459 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 14 10:44:01.467 INFO [stderr]    |
Dec 14 10:44:01.467 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 14 10:44:01.467 INFO [stderr] 
Dec 14 10:44:02.243 INFO [stderr] warning: unused variable: `six`
Dec 14 10:44:02.243 INFO [stderr]   --> src/match.rs:25:7
Dec 14 10:44:02.243 INFO [stderr]    |
Dec 14 10:44:02.243 INFO [stderr] 25 |   let six = plus_one(five);
Dec 14 10:44:02.243 INFO [stderr]    |       ^^^ help: consider using `_six` instead
Dec 14 10:44:02.243 INFO [stderr]    |
Dec 14 10:44:02.243 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 14 10:44:02.243 INFO [stderr] 
Dec 14 10:44:02.243 INFO [stderr] warning: unused variable: `none`
Dec 14 10:44:02.243 INFO [stderr]   --> src/match.rs:26:7
Dec 14 10:44:02.243 INFO [stderr]    |
Dec 14 10:44:02.243 INFO [stderr] 26 |   let none = plus_one(None);
Dec 14 10:44:02.243 INFO [stderr]    |       ^^^^ help: consider using `_none` instead
Dec 14 10:44:02.243 INFO [stderr] 
Dec 14 10:44:02.275 INFO [stderr] warning: variant is never constructed: `Penny`
Dec 14 10:44:02.275 INFO [stderr]  --> src/match.rs:2:3
Dec 14 10:44:02.275 INFO [stderr]   |
Dec 14 10:44:02.275 INFO [stderr] 2 |   Penny,
Dec 14 10:44:02.275 INFO [stderr]   |   ^^^^^
Dec 14 10:44:02.275 INFO [stderr]   |
Dec 14 10:44:02.275 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 14 10:44:02.275 INFO [stderr] 
Dec 14 10:44:02.275 INFO [stderr] warning: variant is never constructed: `Nickel`
Dec 14 10:44:02.275 INFO [stderr]  --> src/match.rs:3:3
Dec 14 10:44:02.275 INFO [stderr]   |
Dec 14 10:44:02.275 INFO [stderr] 3 |   Nickel,
Dec 14 10:44:02.275 INFO [stderr]   |   ^^^^^^
Dec 14 10:44:02.275 INFO [stderr] 
Dec 14 10:44:02.275 INFO [stderr] warning: variant is never constructed: `Dime`
Dec 14 10:44:02.275 INFO [stderr]  --> src/match.rs:4:3
Dec 14 10:44:02.275 INFO [stderr]   |
Dec 14 10:44:02.275 INFO [stderr] 4 |   Dime,
Dec 14 10:44:02.275 INFO [stderr]   |   ^^^^
Dec 14 10:44:02.275 INFO [stderr] 
Dec 14 10:44:02.275 INFO [stderr] warning: variant is never constructed: `Alabama`
Dec 14 10:44:02.275 INFO [stderr]   --> src/match.rs:10:3
Dec 14 10:44:02.275 INFO [stderr]    |
Dec 14 10:44:02.275 INFO [stderr] 10 |   Alabama,
Dec 14 10:44:02.275 INFO [stderr]    |   ^^^^^^^
Dec 14 10:44:02.275 INFO [stderr] 
Dec 14 10:44:02.583 INFO [stderr] warning: variable does not need to be mutable
Dec 14 10:44:02.583 INFO [stderr]  --> src/slice.rs:2:7
Dec 14 10:44:02.583 INFO [stderr]   |
Dec 14 10:44:02.583 INFO [stderr] 2 |   let mut s = String::from("hello world");
Dec 14 10:44:02.583 INFO [stderr]   |       ----^
Dec 14 10:44:02.583 INFO [stderr]   |       |
Dec 14 10:44:02.583 INFO [stderr]   |       help: remove this `mut`
Dec 14 10:44:02.583 INFO [stderr]   |
Dec 14 10:44:02.583 INFO [stderr]   = note: #[warn(unused_mut)] on by default
Dec 14 10:44:02.583 INFO [stderr] 
Dec 14 10:44:04.299 INFO [stderr] warning: unused import: `std::time::Duration`
Dec 14 10:44:04.299 INFO [stderr]  --> src/multiple_thread.rs:2:5
Dec 14 10:44:04.299 INFO [stderr]   |
Dec 14 10:44:04.299 INFO [stderr] 2 | use std::time::Duration;
Dec 14 10:44:04.299 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^
Dec 14 10:44:04.307 INFO [stderr]   |
Dec 14 10:44:04.307 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 14 10:44:04.307 INFO [stderr] 
Dec 14 10:44:06.295 INFO [stderr] error[E0601]: `main` function not found in crate `refcall`
Dec 14 10:44:06.301 INFO [stderr]   |
Dec 14 10:44:06.302 INFO [stderr]   = note: consider adding a `main` function to `src/refcall.rs`
Dec 14 10:44:06.302 INFO [stderr] 
Dec 14 10:44:06.383 INFO [stderr] error: aborting due to previous error
Dec 14 10:44:06.383 INFO [stderr] 
Dec 14 10:44:06.383 INFO [stderr] For more information about this error, try `rustc --explain E0601`.
Dec 14 10:44:06.476 INFO [stderr] error: Could not compile `rust_learning`.
Dec 14 10:44:06.476 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 14 10:44:06.611 INFO [stderr] warning: doc comment not used by rustdoc
Dec 14 10:44:06.611 INFO [stderr]   --> src/struct_ex.rs:17:3
Dec 14 10:44:06.611 INFO [stderr]    |
Dec 14 10:44:06.611 INFO [stderr] 17 |   ///
Dec 14 10:44:06.611 INFO [stderr]    |   ^^^
Dec 14 10:44:06.631 INFO [stderr] warning: unused variable: `integer`
Dec 14 10:44:06.631 INFO [stderr]   --> src/generics.rs:14:7
Dec 14 10:44:06.631 INFO [stderr]    |
Dec 14 10:44:06.631 INFO [stderr] 14 |   let integer = Point {
Dec 14 10:44:06.631 INFO [stderr]    |       ^^^^^^^ help: consider using `_integer` instead
Dec 14 10:44:06.631 INFO [stderr]    |
Dec 14 10:44:06.631 INFO [stderr]    = note: #[warn(unused_doc_comments)] on by default
Dec 14 10:44:06.631 INFO [stderr] 
Dec 14 10:44:06.650 INFO [stderr]    |
Dec 14 10:44:06.650 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 14 10:44:06.650 INFO [stderr] 
Dec 14 10:44:06.667 INFO [stderr] warning: field is never used: `y`
Dec 14 10:44:06.667 INFO [stderr]  --> src/generics.rs:3:3
Dec 14 10:44:06.667 INFO [stderr]   |
Dec 14 10:44:06.667 INFO [stderr] 3 |   y: T
Dec 14 10:44:06.667 INFO [stderr]   |   ^^^^
Dec 14 10:44:06.667 INFO [stderr]   |
Dec 14 10:44:06.667 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 14 10:44:06.667 INFO [stderr] 
Dec 14 10:44:07.899 INFO [stderr] error: build failed
Dec 14 10:44:07.899 INFO [stderr] su: No module specific data is present
Dec 14 10:44:09.147 INFO running `"docker" "inspect" "734fc0de1574296525c54f30f30ff6d871be8b2a016382f4d708757e334ee06c"`
Dec 14 10:44:09.509 INFO running `"docker" "rm" "-f" "734fc0de1574296525c54f30f30ff6d871be8b2a016382f4d708757e334ee06c"`
Dec 14 10:44:09.830 INFO [stdout] 734fc0de1574296525c54f30f30ff6d871be8b2a016382f4d708757e334ee06c