[INFO] updating cached repository DLeyland/Hello-Rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/DLeyland/Hello-Rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/DLeyland/Hello-Rust" "work/ex/beta-1.38-1/sources/1.37.0/gh/DLeyland/Hello-Rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/DLeyland/Hello-Rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/DLeyland/Hello-Rust" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/DLeyland/Hello-Rust"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/DLeyland/Hello-Rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 013d7a63910f33b384f3ef565d2dd17b9a002509
[INFO] sha for GitHub repo DLeyland/Hello-Rust: 013d7a63910f33b384f3ef565d2dd17b9a002509
[INFO] validating manifest of DLeyland/Hello-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 DLeyland/Hello-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 DLeyland/Hello-Rust
[INFO] finished frobbing DLeyland/Hello-Rust
[INFO] frobbed toml for DLeyland/Hello-Rust written to work/ex/beta-1.38-1/sources/1.37.0/gh/DLeyland/Hello-Rust/Cargo.toml
[INFO] started frobbing DLeyland/Hello-Rust
[INFO] finished frobbing DLeyland/Hello-Rust
[INFO] frobbed toml for DLeyland/Hello-Rust written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/DLeyland/Hello-Rust/Cargo.toml
[INFO] crate DLeyland/Hello-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] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing DLeyland/Hello-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-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/DLeyland/Hello-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] 38185474e230704b77ac32f717435efb9ac8658f094bdaa9414f166b2b094372
[INFO] running `"docker" "start" "-a" "38185474e230704b77ac32f717435efb9ac8658f094bdaa9414f166b2b094372"`
[INFO] [stderr]    Compiling hello_world v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:51:31
[INFO] [stderr]    |
[INFO] [stderr] 51 | fn factory(&num: &i32) -> Box<Fn(i32) -> i32> {
[INFO] [stderr]    |                               ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32) -> i32`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]  --> src/main.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     for i in 0..10{
[INFO] [stderr]   |         ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `hello_world1`
[INFO] [stderr]   --> src/main.rs:24:6
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let hello_world1 = hello + world1; //no ampersand needed to add a string and a &str
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_hello_world1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `hello_world2`
[INFO] [stderr]   --> src/main.rs:28:6
[INFO] [stderr]    |
[INFO] [stderr] 28 |     let hello_world2 = hello2 + &world2; //ampersand needed when adding two strings, to allow second string to deref into &str
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_hello_world2`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `for_loop`
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn for_loop(){
[INFO] [stderr]   | ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `while_loop_with_vec`
[INFO] [stderr]   --> src/main.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | fn while_loop_with_vec(){
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `string_example`
[INFO] [stderr]   --> src/main.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn string_example(){
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Circle`
[INFO] [stderr]   --> src/main.rs:31:1
[INFO] [stderr]    |
[INFO] [stderr] 31 | struct Circle{
[INFO] [stderr]    | ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `area`
[INFO] [stderr]   --> src/main.rs:38:2
[INFO] [stderr]    |
[INFO] [stderr] 38 |     fn area(&self)->f64{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `circle_area`
[INFO] [stderr]   --> src/main.rs:43:1
[INFO] [stderr]    |
[INFO] [stderr] 43 | fn circle_area(){ 
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.63s
[INFO] running `"docker" "inspect" "38185474e230704b77ac32f717435efb9ac8658f094bdaa9414f166b2b094372"`
[INFO] running `"docker" "rm" "-f" "38185474e230704b77ac32f717435efb9ac8658f094bdaa9414f166b2b094372"`
[INFO] [stdout] 38185474e230704b77ac32f717435efb9ac8658f094bdaa9414f166b2b094372
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/DLeyland/Hello-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] c5932a810dc3ea8edc56fb39f876002b74a9ba55e28aaa3e384e78d34fa5f19d
[INFO] running `"docker" "start" "-a" "c5932a810dc3ea8edc56fb39f876002b74a9ba55e28aaa3e384e78d34fa5f19d"`
[INFO] [stderr]    Compiling hello_world v0.0.1 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/main.rs:51:31
[INFO] [stderr]    |
[INFO] [stderr] 51 | fn factory(&num: &i32) -> Box<Fn(i32) -> i32> {
[INFO] [stderr]    |                               ^^^^^^^^^^^^^^ help: use `dyn`: `dyn Fn(i32) -> i32`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `i`
[INFO] [stderr]  --> src/main.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     for i in 0..10{
[INFO] [stderr]   |         ^ help: consider prefixing with an underscore: `_i`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `hello_world1`
[INFO] [stderr]   --> src/main.rs:24:6
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let hello_world1 = hello + world1; //no ampersand needed to add a string and a &str
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_hello_world1`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `hello_world2`
[INFO] [stderr]   --> src/main.rs:28:6
[INFO] [stderr]    |
[INFO] [stderr] 28 |     let hello_world2 = hello2 + &world2; //ampersand needed when adding two strings, to allow second string to deref into &str
[INFO] [stderr]    |         ^^^^^^^^^^^^ help: consider prefixing with an underscore: `_hello_world2`
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `for_loop`
[INFO] [stderr]  --> src/main.rs:1:1
[INFO] [stderr]   |
[INFO] [stderr] 1 | fn for_loop(){
[INFO] [stderr]   | ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `while_loop_with_vec`
[INFO] [stderr]   --> src/main.rs:10:1
[INFO] [stderr]    |
[INFO] [stderr] 10 | fn while_loop_with_vec(){
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `string_example`
[INFO] [stderr]   --> src/main.rs:20:1
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn string_example(){
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: struct is never constructed: `Circle`
[INFO] [stderr]   --> src/main.rs:31:1
[INFO] [stderr]    |
[INFO] [stderr] 31 | struct Circle{
[INFO] [stderr]    | ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `area`
[INFO] [stderr]   --> src/main.rs:38:2
[INFO] [stderr]    |
[INFO] [stderr] 38 |     fn area(&self)->f64{
[INFO] [stderr]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `circle_area`
[INFO] [stderr]   --> src/main.rs:43:1
[INFO] [stderr]    |
[INFO] [stderr] 43 | fn circle_area(){ 
[INFO] [stderr]    | ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.58s
[INFO] running `"docker" "inspect" "c5932a810dc3ea8edc56fb39f876002b74a9ba55e28aaa3e384e78d34fa5f19d"`
[INFO] running `"docker" "rm" "-f" "c5932a810dc3ea8edc56fb39f876002b74a9ba55e28aaa3e384e78d34fa5f19d"`
[INFO] [stdout] c5932a810dc3ea8edc56fb39f876002b74a9ba55e28aaa3e384e78d34fa5f19d
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-4/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/DLeyland/Hello-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"`
[INFO] [stdout] af6580ef6cdc02506497b45d4644f27f7a080090a809cc8b59cc19a8c0cf745f
[INFO] running `"docker" "start" "-a" "af6580ef6cdc02506497b45d4644f27f7a080090a809cc8b59cc19a8c0cf745f"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/hello_world-f3fa3631b8c50bb1
[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" "af6580ef6cdc02506497b45d4644f27f7a080090a809cc8b59cc19a8c0cf745f"`
[INFO] running `"docker" "rm" "-f" "af6580ef6cdc02506497b45d4644f27f7a080090a809cc8b59cc19a8c0cf745f"`
[INFO] [stdout] af6580ef6cdc02506497b45d4644f27f7a080090a809cc8b59cc19a8c0cf745f