[INFO] updating cached repository CharlesGe129/learn_rust
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/CharlesGe129/learn_rust
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/CharlesGe129/learn_rust" "work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/CharlesGe129/learn_rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/CharlesGe129/learn_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/CharlesGe129/learn_rust" "work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/CharlesGe129/learn_rust"`
[INFO] [stderr] Cloning into 'work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/CharlesGe129/learn_rust'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c8a414d46a412145ca698c3cab096c6a3fa9aaa6
[INFO] sha for GitHub repo CharlesGe129/learn_rust: c8a414d46a412145ca698c3cab096c6a3fa9aaa6
[INFO] validating manifest of CharlesGe129/learn_rust on toolchain master#f66e4697ae286985ddefc53c3a047614568458bb
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of CharlesGe129/learn_rust on toolchain try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing CharlesGe129/learn_rust
[INFO] finished frobbing CharlesGe129/learn_rust
[INFO] frobbed toml for CharlesGe129/learn_rust written to work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/CharlesGe129/learn_rust/Cargo.toml
[INFO] started frobbing CharlesGe129/learn_rust
[INFO] finished frobbing CharlesGe129/learn_rust
[INFO] frobbed toml for CharlesGe129/learn_rust written to work/ex/pr-58592/sources/try#c3b22200e6f5b70eb1f99ae6944d989ae17a458a/gh/CharlesGe129/learn_rust/Cargo.toml
[INFO] crate CharlesGe129/learn_rust has a lockfile. skipping
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+c3b22200e6f5b70eb1f99ae6944d989ae17a458a-alt" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] checking CharlesGe129/learn_rust against master#f66e4697ae286985ddefc53c3a047614568458bb for pr-58592
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-58592/worker-4/master#f66e4697ae286985ddefc53c3a047614568458bb:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-58592/sources/master#f66e4697ae286985ddefc53c3a047614568458bb/gh/CharlesGe129/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" "+f66e4697ae286985ddefc53c3a047614568458bb-alt" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stdout] 0970fd7e26577bc0f18fda985b4aa91e05f3a79b4602d837568e6abf4da33f66
[INFO] running `"docker" "start" "-a" "0970fd7e26577bc0f18fda985b4aa91e05f3a79b4602d837568e6abf4da33f66"`
[INFO] [stderr]     Checking learn_rust v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: type `Point_mut` should have an upper camel case name
[INFO] [stderr]   --> src/struct.rs:44:12
[INFO] [stderr]    |
[INFO] [stderr] 44 |     struct Point_mut {
[INFO] [stderr]    |            ^^^^^^^^^ help: convert the identifier to upper camel case: `PointMut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_camel_case_types)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/control_flow.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |         println!("No print, outer has been break");
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unreachable_code)] on by default
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]  --> src/array.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let v: Vec<i32> = Vec::new();
[INFO] [stderr]   |         ^ help: consider prefixing with an underscore: `_v`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]  --> src/array.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let v: Vec<i32> = vec![];
[INFO] [stderr]   |         ^ help: consider prefixing with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `hello`
[INFO] [stderr]  --> src/str.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 |     let hello = "hello world!";
[INFO] [stderr]   |         ^^^^^ help: consider prefixing with an underscore: `_hello`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `hello`
[INFO] [stderr]  --> src/str.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let hello: &'static str = "hello world!";
[INFO] [stderr]   |         ^^^^^ help: consider prefixing with an underscore: `_hello`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `hello` is never read
[INFO] [stderr]  --> src/str.rs:6:13
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut hello = String::new();
[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: unused variable: `point`
[INFO] [stderr]  --> src/struct.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let point = Point{x: 1, y: 2};
[INFO] [stderr]   |         ^^^^^ help: consider prefixing with an underscore: `_point`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `green`
[INFO] [stderr]   --> src/struct.rs:14:20
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let Color(red, green, blue) = android_green;
[INFO] [stderr]    |                    ^^^^^ help: consider prefixing with an underscore: `_green`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `blue`
[INFO] [stderr]   --> src/struct.rs:14:27
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let Color(red, green, blue) = android_green;
[INFO] [stderr]    |                           ^^^^ help: consider prefixing with an underscore: `_blue`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/array.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 |     let mut array: [i32; 3] = [0; 3];
[INFO] [stderr]   |         ----^^^^^
[INFO] [stderr]   |         |
[INFO] [stderr]   |         help: remove this `mut`
[INFO] [stderr] warning: type `Point_mut` should have an upper camel case name
[INFO] [stderr]   --> src/struct.rs:44:12
[INFO] [stderr]    |
[INFO] [stderr] 44 |     struct Point_mut {
[INFO] [stderr]    |            ^^^^^^^^^ help: convert the identifier to upper camel case: `PointMut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(non_camel_case_types)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `x`
[INFO] [stderr]  --> src/struct.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |         x: i32,
[INFO] [stderr]   |         ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `y`
[INFO] [stderr]  --> src/struct.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |         y: i32,
[INFO] [stderr]   |         ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `x`
[INFO] [stderr]   --> src/struct.rs:45:9
[INFO] [stderr]    |
[INFO] [stderr] 45 |         x: i32,
[INFO] [stderr]    |         ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]   --> src/control_flow.rs:31:9
[INFO] [stderr]    |
[INFO] [stderr] 31 |         println!("No print, outer has been break");
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unreachable_code)] on by default
[INFO] [stderr]    = note: this error originates in a macro outside of the current crate (in Nightly builds, run with -Z external-macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]  --> src/array.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let v: Vec<i32> = Vec::new();
[INFO] [stderr]   |         ^ help: consider prefixing with an underscore: `_v`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(unused_variables)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `v`
[INFO] [stderr]  --> src/array.rs:7:9
[INFO] [stderr]   |
[INFO] [stderr] 7 |     let v: Vec<i32> = vec![];
[INFO] [stderr]   |         ^ help: consider prefixing with an underscore: `_v`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `hello`
[INFO] [stderr]  --> src/str.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 |     let hello = "hello world!";
[INFO] [stderr]   |         ^^^^^ help: consider prefixing with an underscore: `_hello`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `hello`
[INFO] [stderr]  --> src/str.rs:4:9
[INFO] [stderr]   |
[INFO] [stderr] 4 |     let hello: &'static str = "hello world!";
[INFO] [stderr]   |         ^^^^^ help: consider prefixing with an underscore: `_hello`
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `hello` is never read
[INFO] [stderr]  --> src/str.rs:6:13
[INFO] [stderr]   |
[INFO] [stderr] 6 |     let mut hello = String::new();
[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: unused variable: `point`
[INFO] [stderr]  --> src/struct.rs:9:9
[INFO] [stderr]   |
[INFO] [stderr] 9 |     let point = Point{x: 1, y: 2};
[INFO] [stderr]   |         ^^^^^ help: consider prefixing with an underscore: `_point`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `green`
[INFO] [stderr]   --> src/struct.rs:14:20
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let Color(red, green, blue) = android_green;
[INFO] [stderr]    |                    ^^^^^ help: consider prefixing with an underscore: `_green`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `blue`
[INFO] [stderr]   --> src/struct.rs:14:27
[INFO] [stderr]    |
[INFO] [stderr] 14 |     let Color(red, green, blue) = android_green;
[INFO] [stderr]    |                           ^^^^ help: consider prefixing with an underscore: `_blue`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/array.rs:2:9
[INFO] [stderr]   |
[INFO] [stderr] 2 |     let mut array: [i32; 3] = [0; 3];
[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: `x`
[INFO] [stderr]  --> src/struct.rs:5:9
[INFO] [stderr]   |
[INFO] [stderr] 5 |         x: i32,
[INFO] [stderr]   |         ^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(dead_code)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `y`
[INFO] [stderr]  --> src/struct.rs:6:9
[INFO] [stderr]   |
[INFO] [stderr] 6 |         y: i32,
[INFO] [stderr]   |         ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `x`
[INFO] [stderr]   --> src/struct.rs:45:9
[INFO] [stderr]    |
[INFO] [stderr] 45 |         x: i32,
[INFO] [stderr]    |         ^^^^^^
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.90s
[INFO] running `"docker" "inspect" "0970fd7e26577bc0f18fda985b4aa91e05f3a79b4602d837568e6abf4da33f66"`
[INFO] running `"docker" "rm" "-f" "0970fd7e26577bc0f18fda985b4aa91e05f3a79b4602d837568e6abf4da33f66"`
[INFO] [stdout] 0970fd7e26577bc0f18fda985b4aa91e05f3a79b4602d837568e6abf4da33f66