[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/beta-1.38-1/sources/1.37.0/gh/rjoydip/learn-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/rjoydip/learn-rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/rjoydip/learn-rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/rjoydip/learn-rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/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 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of rjoydip/learn-rust on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "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/beta-1.38-1/sources/1.37.0/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/beta-1.38-1/sources/beta-2019-08-13/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" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] testing rjoydip/learn-rust against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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=warn" "-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" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 637edfd4640fd692c5e68ff704390ec9aa21ef65b4184b83f8f335eaec82ff24
[INFO] running `"docker" "start" "-a" "637edfd4640fd692c5e68ff704390ec9aa21ef65b4184b83f8f335eaec82ff24"`
[INFO] [stderr]    Compiling learn_rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.62s
[INFO] running `"docker" "inspect" "637edfd4640fd692c5e68ff704390ec9aa21ef65b4184b83f8f335eaec82ff24"`
[INFO] running `"docker" "rm" "-f" "637edfd4640fd692c5e68ff704390ec9aa21ef65b4184b83f8f335eaec82ff24"`
[INFO] [stdout] 637edfd4640fd692c5e68ff704390ec9aa21ef65b4184b83f8f335eaec82ff24
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-3/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/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=warn" "-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" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 5f4e9ca80af143ea4a854e96a7a99e4bbbbc0bcdf19b4e2332671bacbd41f729
[INFO] running `"docker" "start" "-a" "5f4e9ca80af143ea4a854e96a7a99e4bbbbc0bcdf19b4e2332671bacbd41f729"`
[INFO] [stderr]    Compiling learn_rust v0.1.0 (/opt/crater/workdir)
[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] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> examples/match.rs:46:10
[INFO] [stderr]    |
[INFO] [stderr] 46 |         4...7 => println!("In between 4...7: {}", a),
[INFO] [stderr]    |          ^^^ help: use `..=` for an inclusive range
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(ellipsis_inclusive_range_patterns)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> examples/match.rs:61:15
[INFO] [stderr]    |
[INFO] [stderr] 61 |         n @ 1 ... 10 => println!("Between 1 to 10 : {}", n),
[INFO] [stderr]    |               ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[INFO] [stderr] warning: `...` range patterns are deprecated
[INFO] [stderr]   --> examples/match.rs:62:16
[INFO] [stderr]    |
[INFO] [stderr] 62 |         n @ 11 ... 20 => println!("Between 11 to 20 : {}", n),
[INFO] [stderr]    |                ^^^ help: use `..=` for an inclusive range
[INFO] [stderr] 
[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] 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] warning: value assigned to `x` is never read
[INFO] [stderr]  --> examples/var.rs:7:13
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let mut x = 5;
[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] 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] 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] error: build failed
[INFO] running `"docker" "inspect" "5f4e9ca80af143ea4a854e96a7a99e4bbbbc0bcdf19b4e2332671bacbd41f729"`
[INFO] running `"docker" "rm" "-f" "5f4e9ca80af143ea4a854e96a7a99e4bbbbc0bcdf19b4e2332671bacbd41f729"`
[INFO] [stdout] 5f4e9ca80af143ea4a854e96a7a99e4bbbbc0bcdf19b4e2332671bacbd41f729