[INFO] updating cached repository https://github.com/bookinstock/rust_example
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "-c" "remote.origin.fetch=refs/heads/*:refs/heads/*" "fetch" "origin" "--force" "--prune"`
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] c83d144f2d500cd60a59da5019b4bc5ca7d2d36f
[INFO] checking bookinstock/rust_example against master#bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc for pr-70917
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbookinstock%2Frust_example" "/workspace/builds/worker-3/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/bookinstock/rust_example on toolchain bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/bookinstock/rust_example
[INFO] finished tweaking git repo https://github.com/bookinstock/rust_example
[INFO] tweaked toml for git repo https://github.com/bookinstock/rust_example written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/bookinstock/rust_example already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "MAP_USER_ID=0" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--network" "none" "rustops/crates-build-env" "/opt/rustwide/cargo-home/bin/cargo" "+bf1f2eedda4fa02b7c9347dd849ed73ddd43dedc" "check" "--frozen" "--all" "--all-targets"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a54df5054077e96a38980551f56ff61e408f8f98b047bb326f57e35656d3cad7
[INFO] running `"docker" "start" "-a" "a54df5054077e96a38980551f56ff61e408f8f98b047bb326f57e35656d3cad7"`
[INFO] [stderr]     Checking rust_example v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0601]: `main` function not found in crate `macro`
[INFO] [stderr]   --> src/bin/macro.rs:21:4
[INFO] [stderr]    |
[INFO] [stderr] 21 | */
[INFO] [stderr]    |    ^ consider adding a `main` function to `src/bin/macro.rs`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0601`.
[INFO] [stderr] error: could not compile `rust_example`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] warning: unused label
[INFO] [stderr]    --> src/bin/control_flow.rs:119:9
[INFO] [stderr]     |
[INFO] [stderr] 119 |         'inner: loop {
[INFO] [stderr]     |         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_labels)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]    --> src/bin/control_flow.rs:125:9
[INFO] [stderr]     |
[INFO] [stderr] 122 |             break 'outer;
[INFO] [stderr]     |             ------------ any code following this expression is unreachable
[INFO] [stderr] ...
[INFO] [stderr] 125 |         println!("never reach");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: path statement with no effect
[INFO] [stderr]   --> src/bin/expression.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 18 |     x;
[INFO] [stderr]    |     ^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(path_statements)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]   --> src/bin/expression.rs:19:5
[INFO] [stderr]    |
[INFO] [stderr] 19 |     x + 1;
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused arithmetic operation that must be used
[INFO] [stderr]   --> src/bin/expression.rs:36:9
[INFO] [stderr]    |
[INFO] [stderr] 36 |         2 * x;
[INFO] [stderr]    |         ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused label
[INFO] [stderr]    --> src/bin/control_flow.rs:119:9
[INFO] [stderr]     |
[INFO] [stderr] 119 |         'inner: loop {
[INFO] [stderr]     |         ^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_labels)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_literal`
[INFO] [stderr]    --> src/bin/pattern_matching.rs:113:4
[INFO] [stderr]     |
[INFO] [stderr] 113 | fn test_literal() {}
[INFO] [stderr]     |    ^^^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_array`
[INFO] [stderr]    --> src/bin/pattern_matching.rs:115:4
[INFO] [stderr]     |
[INFO] [stderr] 115 | fn test_array() {}
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_enum`
[INFO] [stderr]    --> src/bin/pattern_matching.rs:117:4
[INFO] [stderr]     |
[INFO] [stderr] 117 | fn test_enum() {}
[INFO] [stderr]     |    ^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_stuct`
[INFO] [stderr]    --> src/bin/pattern_matching.rs:119:4
[INFO] [stderr]     |
[INFO] [stderr] 119 | fn test_stuct() {}
[INFO] [stderr]     |    ^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_variable`
[INFO] [stderr]    --> src/bin/pattern_matching.rs:137:4
[INFO] [stderr]     |
[INFO] [stderr] 137 | fn test_variable() {}
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_wildcard`
[INFO] [stderr]    --> src/bin/pattern_matching.rs:139:4
[INFO] [stderr]     |
[INFO] [stderr] 139 | fn test_wildcard() {}
[INFO] [stderr]     |    ^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `test_placeholder`
[INFO] [stderr]    --> src/bin/pattern_matching.rs:141:4
[INFO] [stderr]     |
[INFO] [stderr] 141 | fn test_placeholder() {}
[INFO] [stderr]     |    ^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unreachable statement
[INFO] [stderr]    --> src/bin/control_flow.rs:125:9
[INFO] [stderr]     |
[INFO] [stderr] 122 |             break 'outer;
[INFO] [stderr]     |             ------------ any code following this expression is unreachable
[INFO] [stderr] ...
[INFO] [stderr] 125 |         println!("never reach");
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^ unreachable statement
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unreachable_code)]` on by default
[INFO] [stderr]     = note: this warning originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `logical`
[INFO] [stderr]   --> src/bin/primitive.rs:39:9
[INFO] [stderr]    |
[INFO] [stderr] 39 |     let logical: bool = true;
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_logical`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Red`
[INFO] [stderr]    --> src/bin/control_flow.rs:247:9
[INFO] [stderr]     |
[INFO] [stderr] 247 |         Red,
[INFO] [stderr]     |         ^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a_float`
[INFO] [stderr]   --> src/bin/primitive.rs:41:9
[INFO] [stderr]    |
[INFO] [stderr] 41 |     let a_float: f64 = 1.0; // 常规说明
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_a_float`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Blue`
[INFO] [stderr]    --> src/bin/control_flow.rs:248:9
[INFO] [stderr]     |
[INFO] [stderr] 248 |         Blue,
[INFO] [stderr]     |         ^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `Green`
[INFO] [stderr]    --> src/bin/control_flow.rs:249:9
[INFO] [stderr]     |
[INFO] [stderr] 249 |         Green,
[INFO] [stderr]     |         ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `HSV`
[INFO] [stderr]    --> src/bin/control_flow.rs:251:9
[INFO] [stderr]     |
[INFO] [stderr] 251 |         HSV(u32, u32, u32),
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `an_integer`
[INFO] [stderr]   --> src/bin/primitive.rs:42:9
[INFO] [stderr]    |
[INFO] [stderr] 42 |     let an_integer = 5i32; // 后缀说明
[INFO] [stderr]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_an_integer`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `default_float`
[INFO] [stderr]   --> src/bin/primitive.rs:45:9
[INFO] [stderr]    |
[INFO] [stderr] 45 |     let default_float = 3.0; // `f64`
[INFO] [stderr]    |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_default_float`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `default_integer`
[INFO] [stderr]   --> src/bin/primitive.rs:46:9
[INFO] [stderr]    |
[INFO] [stderr] 46 |     let default_integer = 7; // `i32`
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_default_integer`
[INFO] [stderr] 
[INFO] [stderr] warning: variable `inferred_type` is assigned to, but never used
[INFO] [stderr]   --> src/bin/primitive.rs:49:13
[INFO] [stderr]    |
[INFO] [stderr] 49 |     let mut inferred_type = 12; // 根据下一行的赋值推断为 i64 类型
[INFO] [stderr]    |             ^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_inferred_type` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `inferred_type` is never read
[INFO] [stderr]   --> src/bin/primitive.rs:50:5
[INFO] [stderr]    |
[INFO] [stderr] 50 |     inferred_type = 4294967296i64;
[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 `mutable` is assigned to, but never used
[INFO] [stderr]   --> src/bin/primitive.rs:53:13
[INFO] [stderr]    |
[INFO] [stderr] 53 |     let mut mutable = 12; // Mutable `i32`
[INFO] [stderr]    |             ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: consider using `_mutable` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `mutable` is never read
[INFO] [stderr]   --> src/bin/primitive.rs:54:5
[INFO] [stderr]    |
[INFO] [stderr] 54 |     mutable = 21;
[INFO] [stderr]    |     ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = help: maybe it is overwritten before being read?
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `mutable`
[INFO] [stderr]   --> src/bin/primitive.rs:60:9
[INFO] [stderr]    |
[INFO] [stderr] 60 |     let mutable = true;
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_mutable`
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `HSL`
[INFO] [stderr]    --> src/bin/control_flow.rs:252:9
[INFO] [stderr]     |
[INFO] [stderr] 252 |         HSL(u32, u32, u32),
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `CMY`
[INFO] [stderr]    --> src/bin/control_flow.rs:253:9
[INFO] [stderr]     |
[INFO] [stderr] 253 |         CMY(u32, u32, u32),
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `CMYK`
[INFO] [stderr]    --> src/bin/control_flow.rs:254:9
[INFO] [stderr]     |
[INFO] [stderr] 254 |         CMYK(u32, u32, u32, u32),
[INFO] [stderr]     |         ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "a54df5054077e96a38980551f56ff61e408f8f98b047bb326f57e35656d3cad7"`
[INFO] running `"docker" "rm" "-f" "a54df5054077e96a38980551f56ff61e408f8f98b047bb326f57e35656d3cad7"`
[INFO] [stdout] a54df5054077e96a38980551f56ff61e408f8f98b047bb326f57e35656d3cad7
