[INFO] updating cached repository EdenCao/rust_learning
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/EdenCao/rust_learning
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/EdenCao/rust_learning" "work/ex/pr-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/gh/EdenCao/rust_learning"`
[INFO] [stderr] Cloning into 'work/ex/pr-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/gh/EdenCao/rust_learning'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/EdenCao/rust_learning" "work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/gh/EdenCao/rust_learning"`
[INFO] [stderr] Cloning into 'work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/gh/EdenCao/rust_learning'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 3b85aa524f292dd7b9939ed7d5de8b6456618f9f
[INFO] sha for GitHub repo EdenCao/rust_learning: 3b85aa524f292dd7b9939ed7d5de8b6456618f9f
[INFO] validating manifest of EdenCao/rust_learning on toolchain master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f613dc138b4012cf3d2eb40718fbcc7cf0a34039-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of EdenCao/rust_learning on toolchain try#29640c57b5f92febba0e40c50cb863c9a7ede51d
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+29640c57b5f92febba0e40c50cb863c9a7ede51d-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing EdenCao/rust_learning
[INFO] finished frobbing EdenCao/rust_learning
[INFO] frobbed toml for EdenCao/rust_learning written to work/ex/pr-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/gh/EdenCao/rust_learning/Cargo.toml
[INFO] started frobbing EdenCao/rust_learning
[INFO] finished frobbing EdenCao/rust_learning
[INFO] frobbed toml for EdenCao/rust_learning written to work/ex/pr-57745/sources/try#29640c57b5f92febba0e40c50cb863c9a7ede51d/gh/EdenCao/rust_learning/Cargo.toml
[INFO] crate EdenCao/rust_learning has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f613dc138b4012cf3d2eb40718fbcc7cf0a34039-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+29640c57b5f92febba0e40c50cb863c9a7ede51d-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking EdenCao/rust_learning against master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039 for pr-57745
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-57745/worker-0/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-57745/sources/master#f613dc138b4012cf3d2eb40718fbcc7cf0a34039/gh/EdenCao/rust_learning:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+f613dc138b4012cf3d2eb40718fbcc7cf0a34039-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 0c9b1755590c6560635de3084403f104a1f2544bdf6609d26b70d2ed19028cbc
[INFO] running `"docker" "start" "-a" "0c9b1755590c6560635de3084403f104a1f2544bdf6609d26b70d2ed19028cbc"`
[INFO] [stderr]     Checking rust_learning v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: doc comment not used by rustdoc
[INFO] [stderr]   --> src/struct_ex.rs:17:3
[INFO] [stderr]    |
[INFO] [stderr] 17 |   ///
[INFO] [stderr]    |   ^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_doc_comments)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `s6`
[INFO] [stderr]   --> src/owner.rs:19:7
[INFO] [stderr]    |
[INFO] [stderr] 19 |   let s6 = s5;
[INFO] [stderr]    |       ^^ help: consider using `_s6` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `gives_ownership`
[INFO] [stderr]   --> src/owner.rs:37:1
[INFO] [stderr]    |
[INFO] [stderr] 37 | fn gives_ownership() -> String {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::rc::Rc`
[INFO] [stderr]  --> src/shared_mem.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::rc::Rc;
[INFO] [stderr]   |     ^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `post`
[INFO] [stderr]   --> src/blog.rs:30:25
[INFO] [stderr]    |
[INFO] [stderr] 30 |   fn content<'a>(&self, post: &'a Post) -> &'a str {
[INFO] [stderr]    |                         ^^^^ help: consider using `_post` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0601]: `main` function not found in crate `refcall`
[INFO] [stderr]   |
[INFO] [stderr]   = note: consider adding a `main` function to `src/refcall.rs`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0601`.
[INFO] [stderr] error: Could not compile `rust_learning`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: unused variable: `six`
[INFO] [stderr]   --> src/enum.rs:20:7
[INFO] [stderr]    |
[INFO] [stderr] 20 |   let six = IpAddrKind::V6;
[INFO] [stderr]    |       ^^^ help: consider using `_six` instead
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `home`
[INFO] [stderr]   --> src/enum.rs:27:7
[INFO] [stderr]    |
[INFO] [stderr] 27 |   let home = IpAddr {
[INFO] [stderr]    |       ^^^^ help: consider using `_home` instead
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `op_type`
[INFO] [stderr]   --> src/enum.rs:35:10
[INFO] [stderr]    |
[INFO] [stderr] 35 | fn route(op_type: IpAddrKind) { }
[INFO] [stderr]    |          ^^^^^^^ help: consider using `_op_type` instead
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `kind`
[INFO] [stderr]   --> src/enum.rs:14:3
[INFO] [stderr]    |
[INFO] [stderr] 14 |   kind: IpAddrKind,
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `address`
[INFO] [stderr]   --> src/enum.rs:15:3
[INFO] [stderr]    |
[INFO] [stderr] 15 |   address: String
[INFO] [stderr]    |   ^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `query`
[INFO] [stderr]   --> src/read.rs:27:5
[INFO] [stderr]    |
[INFO] [stderr] 27 |     query: String,
[INFO] [stderr]    |     ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `search_case_insensitive`
[INFO] [stderr]   --> src/read.rs:82:1
[INFO] [stderr]    |
[INFO] [stderr] 82 | fn search_case_insensitive<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::time::Duration`
[INFO] [stderr]  --> src/multiple_thread.rs:2:5
[INFO] [stderr]   |
[INFO] [stderr] 2 | use std::time::Duration;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_imports)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `count` is assigned to, but never used
[INFO] [stderr]   --> src/iflet.rs:20:11
[INFO] [stderr]    |
[INFO] [stderr] 20 |   let mut count = 0;
[INFO] [stderr]    |           ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr]    = note: consider using `_count` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `count` is never read
[INFO] [stderr]   --> src/iflet.rs:25:5
[INFO] [stderr]    |
[INFO] [stderr] 25 |     count += 1;
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_assignments)] on by default
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Penny`
[INFO] [stderr]  --> src/iflet.rs:2:3
[INFO] [stderr]   |
[INFO] [stderr] 2 |   Penny,
[INFO] [stderr]   |   ^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Nickel`
[INFO] [stderr]  --> src/iflet.rs:3:3
[INFO] [stderr]   |
[INFO] [stderr] 3 |   Nickel,
[INFO] [stderr]   |   ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Dime`
[INFO] [stderr]  --> src/iflet.rs:4:3
[INFO] [stderr]   |
[INFO] [stderr] 4 |   Dime,
[INFO] [stderr]   |   ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Alabama`
[INFO] [stderr]   --> src/iflet.rs:10:3
[INFO] [stderr]    |
[INFO] [stderr] 10 |   Alabama,
[INFO] [stderr]    |   ^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "0c9b1755590c6560635de3084403f104a1f2544bdf6609d26b70d2ed19028cbc"`
[INFO] running `"docker" "rm" "-f" "0c9b1755590c6560635de3084403f104a1f2544bdf6609d26b70d2ed19028cbc"`
[INFO] [stdout] 0c9b1755590c6560635de3084403f104a1f2544bdf6609d26b70d2ed19028cbc