Dec 02 08:05:41.541 INFO testing EdenCao/rust_learning against 1.30.1 for beta-1.31-5
Dec 02 08:05:41.541 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-7/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-7/beta-1.31-5/1.30.1:/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 +1.30.1 build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 02 08:05:41.943 INFO [stdout] 215834365c652cfabcdecd90e453f8369a6166b2b9a8cbf82b42b450c65740cd
Dec 02 08:05:41.945 INFO running `"docker" "start" "-a" "215834365c652cfabcdecd90e453f8369a6166b2b9a8cbf82b42b450c65740cd"`
Dec 02 08:05:42.942 INFO [stderr] usermod: no changes
Dec 02 08:05:43.079 INFO [stderr]    Compiling rust_learning v0.1.0 (/source)
Dec 02 08:05:44.635 INFO [stderr] warning: unused variable: `post`
Dec 02 08:05:44.635 INFO [stderr]   --> src/blog.rs:30:25
Dec 02 08:05:44.635 INFO [stderr]    |
Dec 02 08:05:44.635 INFO [stderr] 30 |   fn content<'a>(&self, post: &'a Post) -> &'a str {
Dec 02 08:05:44.635 INFO [stderr]    |                         ^^^^ help: consider using `_post` instead
Dec 02 08:05:44.635 INFO [stderr]    |
Dec 02 08:05:44.635 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 02 08:05:44.635 INFO [stderr] 
Dec 02 08:05:45.311 INFO [stderr] warning: doc comment not used by rustdoc
Dec 02 08:05:45.311 INFO [stderr]   --> src/struct_ex.rs:17:3
Dec 02 08:05:45.313 INFO [stderr]    |
Dec 02 08:05:45.313 INFO [stderr] 17 |   ///
Dec 02 08:05:45.313 INFO [stderr]    |   ^^^
Dec 02 08:05:45.313 INFO [stderr]    |
Dec 02 08:05:45.313 INFO [stderr]    = note: #[warn(unused_doc_comments)] on by default
Dec 02 08:05:45.313 INFO [stderr] 
Dec 02 08:05:46.303 INFO [stderr] warning: unused variable: `s6`
Dec 02 08:05:46.303 INFO [stderr]   --> src/owner.rs:19:7
Dec 02 08:05:46.303 INFO [stderr]    |
Dec 02 08:05:46.303 INFO [stderr] 19 |   let s6 = s5;
Dec 02 08:05:46.303 INFO [stderr]    |       ^^ help: consider using `_s6` instead
Dec 02 08:05:46.303 INFO [stderr]    |
Dec 02 08:05:46.303 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 02 08:05:46.303 INFO [stderr] 
Dec 02 08:05:46.311 INFO [stderr] warning: function is never used: `gives_ownership`
Dec 02 08:05:46.311 INFO [stderr]   --> src/owner.rs:37:1
Dec 02 08:05:46.311 INFO [stderr]    |
Dec 02 08:05:46.311 INFO [stderr] 37 | fn gives_ownership() -> String {
Dec 02 08:05:46.311 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 08:05:46.311 INFO [stderr]    |
Dec 02 08:05:46.311 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 02 08:05:46.311 INFO [stderr] 
Dec 02 08:05:46.432 INFO [stderr] error[E0601]: `main` function not found in crate `refcall`
Dec 02 08:05:46.432 INFO [stderr]   |
Dec 02 08:05:46.432 INFO [stderr]   = note: consider adding a `main` function to `src/refcall.rs`
Dec 02 08:05:46.432 INFO [stderr] 
Dec 02 08:05:46.515 INFO [stderr] error: aborting due to previous error
Dec 02 08:05:46.515 INFO [stderr] 
Dec 02 08:05:46.515 INFO [stderr] For more information about this error, try `rustc --explain E0601`.
Dec 02 08:05:46.539 INFO [stderr] error: Could not compile `rust_learning`.
Dec 02 08:05:46.539 INFO [stderr] warning: build failed, waiting for other jobs to finish...
Dec 02 08:05:46.767 INFO [stderr] warning: field is never used: `query`
Dec 02 08:05:46.767 INFO [stderr]   --> src/read.rs:27:5
Dec 02 08:05:46.767 INFO [stderr]    |
Dec 02 08:05:46.767 INFO [stderr] 27 |     query: String,
Dec 02 08:05:46.767 INFO [stderr]    |     ^^^^^^^^^^^^^
Dec 02 08:05:46.767 INFO [stderr]    |
Dec 02 08:05:46.767 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 02 08:05:46.767 INFO [stderr] 
Dec 02 08:05:46.767 INFO [stderr] warning: function is never used: `search_case_insensitive`
Dec 02 08:05:46.767 INFO [stderr]   --> src/read.rs:82:1
Dec 02 08:05:46.767 INFO [stderr]    |
Dec 02 08:05:46.767 INFO [stderr] 82 | fn search_case_insensitive<'a>(query: &str, contents: &'a str) -> Vec<&'a str> {
Dec 02 08:05:46.767 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 02 08:05:46.767 INFO [stderr] 
Dec 02 08:05:47.608 INFO [stderr] error: build failed
Dec 02 08:05:47.608 INFO [stderr] su: No module specific data is present
Dec 02 08:05:48.032 INFO running `"docker" "inspect" "215834365c652cfabcdecd90e453f8369a6166b2b9a8cbf82b42b450c65740cd"`
Dec 02 08:05:48.253 INFO running `"docker" "rm" "-f" "215834365c652cfabcdecd90e453f8369a6166b2b9a8cbf82b42b450c65740cd"`
Dec 02 08:05:48.418 INFO [stdout] 215834365c652cfabcdecd90e453f8369a6166b2b9a8cbf82b42b450c65740cd