Dec 06 14:22:28.860 INFO testing EdenCao/rust_learning against try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468 for pr-56514
Dec 06 14:22:28.861 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56514/worker-7/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/pr-56514/try#6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468:/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 +6eb0fd3ac58f9b16bddb9924a17c3b6c156aa468-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 06 14:22:29.023 INFO [stdout] f23186a0469da7824f717df4bc5e85e7801ea7b438a21f431553a6144b4ad79d
Dec 06 14:22:29.025 INFO running `"docker" "start" "-a" "f23186a0469da7824f717df4bc5e85e7801ea7b438a21f431553a6144b4ad79d"`
Dec 06 14:22:29.411 INFO [stderr] usermod: no changes
Dec 06 14:22:29.465 INFO [stderr]    Compiling rust_learning v0.1.0 (/source)
Dec 06 14:22:30.590 INFO [stderr] warning: unused variable: `user2`
Dec 06 14:22:30.590 INFO [stderr]   --> src/struct.rs:14:7
Dec 06 14:22:30.590 INFO [stderr]    |
Dec 06 14:22:30.590 INFO [stderr] 14 |   let user2 = User {
Dec 06 14:22:30.590 INFO [stderr]    |       ^^^^^ help: consider using `_user2` instead
Dec 06 14:22:30.590 INFO [stderr]    |
Dec 06 14:22:30.590 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 06 14:22:30.590 INFO [stderr] 
Dec 06 14:22:30.590 INFO [stderr] warning: unused variable: `black`
Dec 06 14:22:30.590 INFO [stderr]   --> src/struct.rs:20:7
Dec 06 14:22:30.590 INFO [stderr]    |
Dec 06 14:22:30.590 INFO [stderr] 20 |   let black = Color(0, 0, 0);
Dec 06 14:22:30.590 INFO [stderr]    |       ^^^^^ help: consider using `_black` instead
Dec 06 14:22:30.590 INFO [stderr] 
Dec 06 14:22:30.592 INFO [stderr] warning: field is never used: `username`
Dec 06 14:22:30.593 INFO [stderr]  --> src/struct.rs:2:3
Dec 06 14:22:30.593 INFO [stderr]   |
Dec 06 14:22:30.593 INFO [stderr] 2 |   username: String,
Dec 06 14:22:30.593 INFO [stderr]   |   ^^^^^^^^^^^^^^^^
Dec 06 14:22:30.593 INFO [stderr]   |
Dec 06 14:22:30.593 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 06 14:22:30.593 INFO [stderr] 
Dec 06 14:22:30.593 INFO [stderr] warning: field is never used: `email`
Dec 06 14:22:30.593 INFO [stderr]  --> src/struct.rs:3:3
Dec 06 14:22:30.593 INFO [stderr]   |
Dec 06 14:22:30.593 INFO [stderr] 3 |   email: String,
Dec 06 14:22:30.593 INFO [stderr]   |   ^^^^^^^^^^^^^
Dec 06 14:22:30.593 INFO [stderr] 
Dec 06 14:22:30.593 INFO [stderr] warning: field is never used: `sign_in_count`
Dec 06 14:22:30.593 INFO [stderr]  --> src/struct.rs:4:3
Dec 06 14:22:30.593 INFO [stderr]   |
Dec 06 14:22:30.596 INFO [stderr] 4 |   sign_in_count: u64,
Dec 06 14:22:30.596 INFO [stderr]   |   ^^^^^^^^^^^^^^^^^^
Dec 06 14:22:30.596 INFO [stderr] 
Dec 06 14:22:30.596 INFO [stderr] warning: field is never used: `active`
Dec 06 14:22:30.596 INFO [stderr]  --> src/struct.rs:5:3
Dec 06 14:22:30.596 INFO [stderr]   |
Dec 06 14:22:30.596 INFO [stderr] 5 |   active: bool
Dec 06 14:22:30.596 INFO [stderr]   |   ^^^^^^^^^^^^
Dec 06 14:22:30.596 INFO [stderr] 
Dec 06 14:22:30.675 INFO [stderr] warning: field is never used: `query`
Dec 06 14:22:30.676 INFO [stderr]   --> src/read.rs:27:5
Dec 06 14:22:30.676 INFO [stderr]    |
Dec 06 14:22:30.676 INFO [stderr] 27 |     query: String,
Dec 06 14:22:30.676 INFO [stderr]    |     ^^^^^^^^^^^^^
Dec 06 14:22:30.676 INFO [stderr]    |
Dec 06 14:22:30.676 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 06 14:22:30.676 INFO [stderr] 
Dec 06 14:22:30.676 INFO [stderr] warning: function is never used: `search_case_insensitive`
Dec 06 14:22:30.676 INFO [stderr]   --> src/read.rs:82:1
Dec 06 14:22:30.676 INFO [stderr]    |
Dec 06 14:22:30.676 INFO [stderr] 82 | fn search_case_insensitive<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
Dec 06 14:22:30.676 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 06 14:22:30.676 INFO [stderr] 
Dec 06 14:22:32.245 INFO [stderr] warning: unused variable: `six`
Dec 06 14:22:32.245 INFO [stderr]   --> src/match.rs:25:7
Dec 06 14:22:32.245 INFO [stderr]    |
Dec 06 14:22:32.245 INFO [stderr] 25 |   let six = plus_one(five);
Dec 06 14:22:32.245 INFO [stderr]    |       ^^^ help: consider using `_six` instead
Dec 06 14:22:32.245 INFO [stderr]    |
Dec 06 14:22:32.245 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 06 14:22:32.245 INFO [stderr] 
Dec 06 14:22:32.245 INFO [stderr] warning: unused variable: `none`
Dec 06 14:22:32.245 INFO [stderr]   --> src/match.rs:26:7
Dec 06 14:22:32.245 INFO [stderr]    |
Dec 06 14:22:32.245 INFO [stderr] 26 |   let none = plus_one(None);
Dec 06 14:22:32.245 INFO [stderr]    |       ^^^^ help: consider using `_none` instead
Dec 06 14:22:32.245 INFO [stderr] 
Dec 06 14:22:32.245 INFO [stderr] warning: variant is never constructed: `Penny`
Dec 06 14:22:32.245 INFO [stderr]  --> src/match.rs:2:3
Dec 06 14:22:32.245 INFO [stderr]   |
Dec 06 14:22:32.245 INFO [stderr] 2 |   Penny,
Dec 06 14:22:32.245 INFO [stderr]   |   ^^^^^
Dec 06 14:22:32.245 INFO [stderr]   |
Dec 06 14:22:32.245 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 06 14:22:32.245 INFO [stderr] 
Dec 06 14:22:32.245 INFO [stderr] warning: variant is never constructed: `Nickel`
Dec 06 14:22:32.245 INFO [stderr]  --> src/match.rs:3:3
Dec 06 14:22:32.245 INFO [stderr]   |
Dec 06 14:22:32.245 INFO [stderr] 3 |   Nickel,
Dec 06 14:22:32.245 INFO [stderr]   |   ^^^^^^
Dec 06 14:22:32.245 INFO [stderr] 
Dec 06 14:22:32.245 INFO [stderr] warning: variant is never constructed: `Dime`
Dec 06 14:22:32.245 INFO [stderr]  --> src/match.rs:4:3
Dec 06 14:22:32.245 INFO [stderr]   |
Dec 06 14:22:32.245 INFO [stderr] 4 |   Dime,
Dec 06 14:22:32.245 INFO [stderr]   |   ^^^^
Dec 06 14:22:32.245 INFO [stderr] 
Dec 06 14:22:32.245 INFO [stderr] warning: variant is never constructed: `Alabama`
Dec 06 14:22:32.245 INFO [stderr]   --> src/match.rs:10:3
Dec 06 14:22:32.245 INFO [stderr]    |
Dec 06 14:22:32.245 INFO [stderr] 10 |   Alabama,
Dec 06 14:22:32.245 INFO [stderr]    |   ^^^^^^^
Dec 06 14:22:32.245 INFO [stderr] 
Dec 06 14:22:32.286 INFO [stderr] warning: variable `count` is assigned to, but never used
Dec 06 14:22:32.286 INFO [stderr]   --> src/iflet.rs:20:11
Dec 06 14:22:32.286 INFO [stderr]    |
Dec 06 14:22:32.286 INFO [stderr] 20 |   let mut count = 0;
Dec 06 14:22:32.286 INFO [stderr]    |           ^^^^^
Dec 06 14:22:32.286 INFO [stderr]    |
Dec 06 14:22:32.286 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 06 14:22:32.286 INFO [stderr]    = note: consider using `_count` instead
Dec 06 14:22:32.286 INFO [stderr] 
Dec 06 14:22:32.286 INFO [stderr] warning: value assigned to `count` is never read
Dec 06 14:22:32.286 INFO [stderr]   --> src/iflet.rs:25:5
Dec 06 14:22:32.286 INFO [stderr]    |
Dec 06 14:22:32.286 INFO [stderr] 25 |     count += 1;
Dec 06 14:22:32.286 INFO [stderr]    |     ^^^^^
Dec 06 14:22:32.286 INFO [stderr]    |
Dec 06 14:22:32.286 INFO [stderr]    = note: #[warn(unused_assignments)] on by default
Dec 06 14:22:32.286 INFO [stderr] 
Dec 06 14:22:32.288 INFO [stderr] warning: unused variable: `six`
Dec 06 14:22:32.288 INFO [stderr]   --> src/enum.rs:20:7
Dec 06 14:22:32.288 INFO [stderr]    |
Dec 06 14:22:32.288 INFO [stderr] 20 |   let six = IpAddrKind::V6;
Dec 06 14:22:32.288 INFO [stderr]    |       ^^^ help: consider using `_six` instead
Dec 06 14:22:32.288 INFO [stderr]    |
Dec 06 14:22:32.288 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 06 14:22:32.288 INFO [stderr] 
Dec 06 14:22:32.288 INFO [stderr] warning: unused variable: `home`
Dec 06 14:22:32.288 INFO [stderr]   --> src/enum.rs:27:7
Dec 06 14:22:32.288 INFO [stderr]    |
Dec 06 14:22:32.288 INFO [stderr] 27 |   let home = IpAddr {
Dec 06 14:22:32.288 INFO [stderr]    |       ^^^^ help: consider using `_home` instead
Dec 06 14:22:32.288 INFO [stderr] 
Dec 06 14:22:32.288 INFO [stderr] warning: unused variable: `op_type`
Dec 06 14:22:32.288 INFO [stderr]   --> src/enum.rs:35:10
Dec 06 14:22:32.288 INFO [stderr]    |
Dec 06 14:22:32.288 INFO [stderr] 35 | fn route(op_type: IpAddrKind) { }
Dec 06 14:22:32.288 INFO [stderr]    |          ^^^^^^^ help: consider using `_op_type` instead
Dec 06 14:22:32.288 INFO [stderr] 
Dec 06 14:22:32.296 INFO [stderr] warning: variant is never constructed: `Penny`
Dec 06 14:22:32.296 INFO [stderr]  --> src/iflet.rs:2:3
Dec 06 14:22:32.296 INFO [stderr]   |
Dec 06 14:22:32.296 INFO [stderr] 2 |   Penny,
Dec 06 14:22:32.296 INFO [stderr]   |   ^^^^^
Dec 06 14:22:32.296 INFO [stderr]   |
Dec 06 14:22:32.296 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 06 14:22:32.296 INFO [stderr] 
Dec 06 14:22:32.296 INFO [stderr] warning: variant is never constructed: `Nickel`
Dec 06 14:22:32.296 INFO [stderr]  --> src/iflet.rs:3:3
Dec 06 14:22:32.296 INFO [stderr]   |
Dec 06 14:22:32.296 INFO [stderr] 3 |   Nickel,
Dec 06 14:22:32.296 INFO [stderr]   |   ^^^^^^
Dec 06 14:22:32.296 INFO [stderr] 
Dec 06 14:22:32.296 INFO [stderr] warning: variant is never constructed: `Dime`
Dec 06 14:22:32.296 INFO [stderr]  --> src/iflet.rs:4:3
Dec 06 14:22:32.296 INFO [stderr]   |
Dec 06 14:22:32.296 INFO [stderr] 4 |   Dime,
Dec 06 14:22:32.296 INFO [stderr]   |   ^^^^
Dec 06 14:22:32.296 INFO [stderr] 
Dec 06 14:22:32.296 INFO [stderr] warning: variant is never constructed: `Alabama`
Dec 06 14:22:32.296 INFO [stderr]   --> src/iflet.rs:10:3
Dec 06 14:22:32.296 INFO [stderr]    |
Dec 06 14:22:32.296 INFO [stderr] 10 |   Alabama,
Dec 06 14:22:32.296 INFO [stderr]    |   ^^^^^^^
Dec 06 14:22:32.296 INFO [stderr] 
Dec 06 14:22:32.296 INFO [stderr] warning: field is never used: `kind`
Dec 06 14:22:32.297 INFO [stderr]   --> src/enum.rs:14:3
Dec 06 14:22:32.297 INFO [stderr]    |
Dec 06 14:22:32.297 INFO [stderr] 14 |   kind: IpAddrKind,
Dec 06 14:22:32.297 INFO [stderr]    |   ^^^^^^^^^^^^^^^^
Dec 06 14:22:32.297 INFO [stderr]    |
Dec 06 14:22:32.297 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 06 14:22:32.297 INFO [stderr] 
Dec 06 14:22:32.297 INFO [stderr] warning: field is never used: `address`
Dec 06 14:22:32.297 INFO [stderr]   --> src/enum.rs:15:3
Dec 06 14:22:32.297 INFO [stderr]    |
Dec 06 14:22:32.297 INFO [stderr] 15 |   address: String
Dec 06 14:22:32.297 INFO [stderr]    |   ^^^^^^^^^^^^^^^
Dec 06 14:22:32.297 INFO [stderr] 
Dec 06 14:22:32.336 INFO [stderr] warning: unused variable: `post`
Dec 06 14:22:32.336 INFO [stderr]   --> src/blog.rs:30:25
Dec 06 14:22:32.336 INFO [stderr]    |
Dec 06 14:22:32.336 INFO [stderr] 30 |   fn content<'a>(&self, post: &'a Post) -> &'a str {
Dec 06 14:22:32.336 INFO [stderr]    |                         ^^^^ help: consider using `_post` instead
Dec 06 14:22:32.336 INFO [stderr]    |
Dec 06 14:22:32.336 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 06 14:22:32.336 INFO [stderr] 
Dec 06 14:22:32.401 INFO [stderr] warning: variable does not need to be mutable
Dec 06 14:22:32.402 INFO [stderr]  --> src/slice.rs:2:7
Dec 06 14:22:32.402 INFO [stderr]   |
Dec 06 14:22:32.402 INFO [stderr] 2 |   let mut s = String::from("hello world");
Dec 06 14:22:32.402 INFO [stderr]   |       ----^
Dec 06 14:22:32.402 INFO [stderr]   |       |
Dec 06 14:22:32.402 INFO [stderr]   |       help: remove this `mut`
Dec 06 14:22:32.402 INFO [stderr]   |
Dec 06 14:22:32.402 INFO [stderr]   = note: #[warn(unused_mut)] on by default
Dec 06 14:22:32.402 INFO [stderr] 
Dec 06 14:22:32.483 INFO [stderr] error[E0601]: `main` function not found in crate `refcall`
Dec 06 14:22:32.483 INFO [stderr]   |
Dec 06 14:22:32.483 INFO [stderr]   = note: consider adding a `main` function to `src/refcall.rs`
Dec 06 14:22:32.483 INFO [stderr] 
Dec 06 14:22:32.504 INFO [stderr] error: aborting due to previous error
Dec 06 14:22:32.504 INFO [stderr] 
Dec 06 14:22:32.504 INFO [stderr] For more information about this error, try `rustc --explain E0601`.
Dec 06 14:22:32.508 INFO [stderr] error: Could not compile `rust_learning`.
Dec 06 14:22:32.508 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 06 14:22:32.624 INFO [stderr] warning: unused import: `std::time::Duration`
Dec 06 14:22:32.624 INFO [stderr]  --> src/multiple_thread.rs:2:5
Dec 06 14:22:32.624 INFO [stderr]   |
Dec 06 14:22:32.624 INFO [stderr] 2 | use std::time::Duration;
Dec 06 14:22:32.624 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^
Dec 06 14:22:32.624 INFO [stderr]   |
Dec 06 14:22:32.624 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 06 14:22:32.624 INFO [stderr] 
Dec 06 14:22:33.152 INFO [stderr] error: build failed
Dec 06 14:22:33.153 INFO [stderr] su: No module specific data is present
Dec 06 14:22:33.486 INFO running `"docker" "inspect" "f23186a0469da7824f717df4bc5e85e7801ea7b438a21f431553a6144b4ad79d"`
Dec 06 14:22:33.564 INFO running `"docker" "rm" "-f" "f23186a0469da7824f717df4bc5e85e7801ea7b438a21f431553a6144b4ad79d"`
Dec 06 14:22:33.657 INFO [stdout] f23186a0469da7824f717df4bc5e85e7801ea7b438a21f431553a6144b4ad79d