[INFO] updating cached repository vksmgr/Learn_Rust_Programming
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/vksmgr/Learn_Rust_Programming
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/vksmgr/Learn_Rust_Programming" "work/ex/beta-1.38-1/sources/1.37.0/gh/vksmgr/Learn_Rust_Programming"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/vksmgr/Learn_Rust_Programming'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/vksmgr/Learn_Rust_Programming" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/vksmgr/Learn_Rust_Programming"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/vksmgr/Learn_Rust_Programming'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 04d108e88a5217d3c603f557fb411b91f3036bb5
[INFO] sha for GitHub repo vksmgr/Learn_Rust_Programming: 04d108e88a5217d3c603f557fb411b91f3036bb5
[INFO] validating manifest of vksmgr/Learn_Rust_Programming 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 vksmgr/Learn_Rust_Programming 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 vksmgr/Learn_Rust_Programming
[INFO] finished frobbing vksmgr/Learn_Rust_Programming
[INFO] frobbed toml for vksmgr/Learn_Rust_Programming written to work/ex/beta-1.38-1/sources/1.37.0/gh/vksmgr/Learn_Rust_Programming/Cargo.toml
[INFO] started frobbing vksmgr/Learn_Rust_Programming
[INFO] finished frobbing vksmgr/Learn_Rust_Programming
[INFO] frobbed toml for vksmgr/Learn_Rust_Programming written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/vksmgr/Learn_Rust_Programming/Cargo.toml
[INFO] crate vksmgr/Learn_Rust_Programming 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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing vksmgr/Learn_Rust_Programming 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-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/vksmgr/Learn_Rust_Programming:/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] 1803279c7edc168e1463225a785a4b3cf4d2f97f9642bd78b5ba4a80a8bd6b60
[INFO] running `"docker" "start" "-a" "1803279c7edc168e1463225a785a4b3cf4d2f97f9642bd78b5ba4a80a8bd6b60"`
[INFO] [stderr]    Compiling algorithms v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/life_time.rs:26:13
[INFO] [stderr]    |
[INFO] [stderr] 26 |         let x = &mut a;     //==> borrower
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `y` is assigned to, but never used
[INFO] [stderr]   --> src/life_time.rs:62:9
[INFO] [stderr]    |
[INFO] [stderr] 62 |     let y: &Foo;
[INFO] [stderr]    |         ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_y` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `y` is never read
[INFO] [stderr]   --> src/life_time.rs:69:8
[INFO] [stderr]    |
[INFO] [stderr] 69 |        y = x;
[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: variable does not need to be mutable
[INFO] [stderr]   --> src/life_time.rs:61:9
[INFO] [stderr]    |
[INFO] [stderr] 61 |     let mut a = Foo {f: Box::new(0)};
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `f`
[INFO] [stderr]   --> src/life_time.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     f: Box<i32>,
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `not_access_resource_mutable_borrow`
[INFO] [stderr]   --> src/life_time.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn not_access_resource_mutable_borrow(){
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `borrower_can_move_mut_borrow`
[INFO] [stderr]   --> src/life_time.rs:34:1
[INFO] [stderr]    |
[INFO] [stderr] 34 | fn borrower_can_move_mut_borrow(){
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `borrow_formula`
[INFO] [stderr]   --> src/life_time.rs:60:1
[INFO] [stderr]    |
[INFO] [stderr] 60 | fn borrow_formula(){
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `max`
[INFO] [stderr]   --> src/life_time.rs:88:1
[INFO] [stderr]    |
[INFO] [stderr] 88 | fn max<'a>(x: &'a Foo, y: &'a Foo) -> &'a Foo{
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `printArray`
[INFO] [stderr]   --> src/main.rs:48:1
[INFO] [stderr]    |
[INFO] [stderr] 48 | fn printArray(arr: &[i32]){
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `getInput`
[INFO] [stderr]   --> src/main.rs:54:1
[INFO] [stderr]    |
[INFO] [stderr] 54 | fn getInput() ->String{
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `readInt`
[INFO] [stderr]   --> src/main.rs:63:1
[INFO] [stderr]    |
[INFO] [stderr] 63 | fn readInt() -> i32{
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `printArray` should have a snake case name
[INFO] [stderr]   --> src/main.rs:48:4
[INFO] [stderr]    |
[INFO] [stderr] 48 | fn printArray(arr: &[i32]){
[INFO] [stderr]    |    ^^^^^^^^^^ help: convert the identifier to snake case: `print_array`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `getInput` should have a snake case name
[INFO] [stderr]   --> src/main.rs:54:4
[INFO] [stderr]    |
[INFO] [stderr] 54 | fn getInput() ->String{
[INFO] [stderr]    |    ^^^^^^^^ help: convert the identifier to snake case: `get_input`
[INFO] [stderr] 
[INFO] [stderr] warning: function `readInt` should have a snake case name
[INFO] [stderr]   --> src/main.rs:63:4
[INFO] [stderr]    |
[INFO] [stderr] 63 | fn readInt() -> i32{
[INFO] [stderr]    |    ^^^^^^^ help: convert the identifier to snake case: `read_int`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `intNumber` should have a snake case name
[INFO] [stderr]   --> src/main.rs:66:9
[INFO] [stderr]    |
[INFO] [stderr] 66 |     let intNumber =  match  trimmed.parse::<i32>() {
[INFO] [stderr]    |         ^^^^^^^^^ help: convert the identifier to snake case: `int_number`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `"docker" "inspect" "1803279c7edc168e1463225a785a4b3cf4d2f97f9642bd78b5ba4a80a8bd6b60"`
[INFO] running `"docker" "rm" "-f" "1803279c7edc168e1463225a785a4b3cf4d2f97f9642bd78b5ba4a80a8bd6b60"`
[INFO] [stdout] 1803279c7edc168e1463225a785a4b3cf4d2f97f9642bd78b5ba4a80a8bd6b60
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/vksmgr/Learn_Rust_Programming:/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] 3edc40575cdb851c0d77b15028aa40300d84b75416802bd5a6dd21dddf7dd275
[INFO] running `"docker" "start" "-a" "3edc40575cdb851c0d77b15028aa40300d84b75416802bd5a6dd21dddf7dd275"`
[INFO] [stderr]    Compiling algorithms v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]   --> src/life_time.rs:26:13
[INFO] [stderr]    |
[INFO] [stderr] 26 |         let x = &mut a;     //==> borrower
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `y` is assigned to, but never used
[INFO] [stderr]   --> src/life_time.rs:62:9
[INFO] [stderr]    |
[INFO] [stderr] 62 |     let y: &Foo;
[INFO] [stderr]    |         ^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_y` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `y` is never read
[INFO] [stderr]   --> src/life_time.rs:69:8
[INFO] [stderr]    |
[INFO] [stderr] 69 |        y = x;
[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: variable does not need to be mutable
[INFO] [stderr]   --> src/life_time.rs:61:9
[INFO] [stderr]    |
[INFO] [stderr] 61 |     let mut a = Foo {f: Box::new(0)};
[INFO] [stderr]    |         ----^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `f`
[INFO] [stderr]   --> src/life_time.rs:11:5
[INFO] [stderr]    |
[INFO] [stderr] 11 |     f: Box<i32>,
[INFO] [stderr]    |     ^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `not_access_resource_mutable_borrow`
[INFO] [stderr]   --> src/life_time.rs:15:1
[INFO] [stderr]    |
[INFO] [stderr] 15 | fn not_access_resource_mutable_borrow(){
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `borrower_can_move_mut_borrow`
[INFO] [stderr]   --> src/life_time.rs:34:1
[INFO] [stderr]    |
[INFO] [stderr] 34 | fn borrower_can_move_mut_borrow(){
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `borrow_formula`
[INFO] [stderr]   --> src/life_time.rs:60:1
[INFO] [stderr]    |
[INFO] [stderr] 60 | fn borrow_formula(){
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `max`
[INFO] [stderr]   --> src/life_time.rs:88:1
[INFO] [stderr]    |
[INFO] [stderr] 88 | fn max<'a>(x: &'a Foo, y: &'a Foo) -> &'a Foo{
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `printArray`
[INFO] [stderr]   --> src/main.rs:48:1
[INFO] [stderr]    |
[INFO] [stderr] 48 | fn printArray(arr: &[i32]){
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `getInput`
[INFO] [stderr]   --> src/main.rs:54:1
[INFO] [stderr]    |
[INFO] [stderr] 54 | fn getInput() ->String{
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `readInt`
[INFO] [stderr]   --> src/main.rs:63:1
[INFO] [stderr]    |
[INFO] [stderr] 63 | fn readInt() -> i32{
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `printArray` should have a snake case name
[INFO] [stderr]   --> src/main.rs:48:4
[INFO] [stderr]    |
[INFO] [stderr] 48 | fn printArray(arr: &[i32]){
[INFO] [stderr]    |    ^^^^^^^^^^ help: convert the identifier to snake case: `print_array`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_snake_case)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function `getInput` should have a snake case name
[INFO] [stderr]   --> src/main.rs:54:4
[INFO] [stderr]    |
[INFO] [stderr] 54 | fn getInput() ->String{
[INFO] [stderr]    |    ^^^^^^^^ help: convert the identifier to snake case: `get_input`
[INFO] [stderr] 
[INFO] [stderr] warning: function `readInt` should have a snake case name
[INFO] [stderr]   --> src/main.rs:63:4
[INFO] [stderr]    |
[INFO] [stderr] 63 | fn readInt() -> i32{
[INFO] [stderr]    |    ^^^^^^^ help: convert the identifier to snake case: `read_int`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `intNumber` should have a snake case name
[INFO] [stderr]   --> src/main.rs:66:9
[INFO] [stderr]    |
[INFO] [stderr] 66 |     let intNumber =  match  trimmed.parse::<i32>() {
[INFO] [stderr]    |         ^^^^^^^^^ help: convert the identifier to snake case: `int_number`
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.40s
[INFO] running `"docker" "inspect" "3edc40575cdb851c0d77b15028aa40300d84b75416802bd5a6dd21dddf7dd275"`
[INFO] running `"docker" "rm" "-f" "3edc40575cdb851c0d77b15028aa40300d84b75416802bd5a6dd21dddf7dd275"`
[INFO] [stdout] 3edc40575cdb851c0d77b15028aa40300d84b75416802bd5a6dd21dddf7dd275
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-5/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/vksmgr/Learn_Rust_Programming:/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"`
[INFO] [stdout] 33eb564b383cd01dc041e8ee8093a82171e2c47c7da3f88005aefe0d950bbcbe
[INFO] running `"docker" "start" "-a" "33eb564b383cd01dc041e8ee8093a82171e2c47c7da3f88005aefe0d950bbcbe"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.00s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/algorithms-25864c1486aeb9b2
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "33eb564b383cd01dc041e8ee8093a82171e2c47c7da3f88005aefe0d950bbcbe"`
[INFO] running `"docker" "rm" "-f" "33eb564b383cd01dc041e8ee8093a82171e2c47c7da3f88005aefe0d950bbcbe"`
[INFO] [stdout] 33eb564b383cd01dc041e8ee8093a82171e2c47c7da3f88005aefe0d950bbcbe