[INFO] updating cached repository rjoydip/learn-rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/rjoydip/learn-rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/rjoydip/learn-rust" "work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/rjoydip/learn-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/rjoydip/learn-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rjoydip/learn-rust" "work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/rjoydip/learn-rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/rjoydip/learn-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 0e91f308ef5e3ecc09594c3d9db61be3dfe1b6f5
[INFO] sha for GitHub repo rjoydip/learn-rust: 0e91f308ef5e3ecc09594c3d9db61be3dfe1b6f5
[INFO] validating manifest of rjoydip/learn-rust on toolchain master#60960a260f7b5c695fd0717311d72ce62dd4eb43
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rjoydip/learn-rust on toolchain try#266783e4e09e4e9d5307c1c8e695659c58bbcac7
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing rjoydip/learn-rust
[INFO] finished frobbing rjoydip/learn-rust
[INFO] frobbed toml for rjoydip/learn-rust written to work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/rjoydip/learn-rust/Cargo.toml
[INFO] started frobbing rjoydip/learn-rust
[INFO] finished frobbing rjoydip/learn-rust
[INFO] frobbed toml for rjoydip/learn-rust written to work/ex/pr-63376/sources/try#266783e4e09e4e9d5307c1c8e695659c58bbcac7/gh/rjoydip/learn-rust/Cargo.toml
[INFO] crate rjoydip/learn-rust already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+266783e4e09e4e9d5307c1c8e695659c58bbcac7-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking rjoydip/learn-rust against master#60960a260f7b5c695fd0717311d72ce62dd4eb43 for pr-63376
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-63376/worker-7/master#60960a260f7b5c695fd0717311d72ce62dd4eb43:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-63376/sources/master#60960a260f7b5c695fd0717311d72ce62dd4eb43/gh/rjoydip/learn-rust:/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" "+60960a260f7b5c695fd0717311d72ce62dd4eb43-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 11c55756a9583ad420e9929cdd9321ef6bb332ed14e6a7e158d41671a7cb858c
[INFO] running `"docker" "start" "-a" "11c55756a9583ad420e9929cdd9321ef6bb332ed14e6a7e158d41671a7cb858c"`
[INFO] [stderr]     Checking learn_rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]  --> examples/hash_map.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 4 | /     /**
[INFO] [stderr] 5 | |      * Example 1
[INFO] [stderr] 6 | |      * Simple hash map
[INFO] [stderr] 7 | |      * Insert value in HashMap and print that
[INFO] [stderr] 8 | |      **/
[INFO] [stderr]   | |________^
[INFO] [stderr] 9 |       let mut hm = HashMap::new();
[INFO] [stderr]   |       ---------------------------- rustdoc does not generate documentation for statements
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error[E0428]: the name `main` is defined multiple times
[INFO] [stderr]   --> examples/struct.rs:32:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn main() {
[INFO] [stderr]    | --------- previous definition of the value `main` here
[INFO] [stderr] ...
[INFO] [stderr] 32 | fn main() {
[INFO] [stderr]    | ^^^^^^^^^ `main` redefined here
[INFO] [stderr]    |
[INFO] [stderr]    = note: `main` must be defined only once in the value namespace of this module
[INFO] [stderr] 
[INFO] [stderr] error[E0136]: multiple 'main' functions
[INFO] [stderr]   --> examples/struct.rs:32:1
[INFO] [stderr]    |
[INFO] [stderr] 32 | / fn main() {
[INFO] [stderr] 33 | |     let a = A(1);
[INFO] [stderr] 34 | |     let b = B(1.1);
[INFO] [stderr] 35 | |     let c = a.clone();
[INFO] [stderr] 36 | |
[INFO] [stderr] 37 | |     println!("{:?}, {:?}, {:?}", a, b, c);
[INFO] [stderr] 38 | | }
[INFO] [stderr]    | |_^
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> examples/loop.rs:30:5
[INFO] [stderr]    |
[INFO] [stderr] 30 | /     /**
[INFO] [stderr] 31 | |      * Break
[INFO] [stderr] 32 | |      **/
[INFO] [stderr]    | |________^
[INFO] [stderr] 33 |       let mut x = 0;
[INFO] [stderr]    |       -------------- rustdoc does not generate documentation for statements
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_doc_comments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused doc comment
[INFO] [stderr]   --> examples/loop.rs:65:5
[INFO] [stderr]    |
[INFO] [stderr] 65 | /     /**
[INFO] [stderr] 66 | |      * Continue
[INFO] [stderr] 67 | |      **/
[INFO] [stderr]    | |________^
[INFO] [stderr] 68 | /     for i in 1..20 {
[INFO] [stderr] 69 | |         if i == 2 {
[INFO] [stderr] 70 | |             continue;
[INFO] [stderr] 71 | |         }
[INFO] [stderr] 72 | |         println!("Value of i is: {}", i);
[INFO] [stderr] 73 | |     }
[INFO] [stderr]    | |_____- rustdoc does not generate documentation for expressions
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to 2 previous errors
[INFO] [stderr] 
[INFO] [stderr] Some errors have detailed explanations: E0136, E0428.
[INFO] [stderr] For more information about an error, try `rustc --explain E0136`.
[INFO] [stderr] error: Could not compile `learn_rust`.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]  --> examples/loop.rs:8:5
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let mut count = 5;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "11c55756a9583ad420e9929cdd9321ef6bb332ed14e6a7e158d41671a7cb858c"`
[INFO] running `"docker" "rm" "-f" "11c55756a9583ad420e9929cdd9321ef6bb332ed14e6a7e158d41671a7cb858c"`
[INFO] [stdout] 11c55756a9583ad420e9929cdd9321ef6bb332ed14e6a7e158d41671a7cb858c