[INFO] cloning repository https://github.com/huangqian/rust-in-action
[INFO] running `"git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/huangqian/rust-in-action" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhuangqian%2Frust-in-action"`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhuangqian%2Frust-in-action'...
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] f36881cede964f6008c95f60cb1004db4fba9cc2
[INFO] checking huangqian/rust-in-action against try#1a399c10897767c36d147199696c96f193034e49 for pr-72644
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhuangqian%2Frust-in-action" "/workspace/builds/worker-1/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/huangqian/rust-in-action on toolchain 1a399c10897767c36d147199696c96f193034e49
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a399c10897767c36d147199696c96f193034e49" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/huangqian/rust-in-action
[INFO] removed 0 missing examples
[INFO] finished tweaking git repo https://github.com/huangqian/rust-in-action
[INFO] tweaked toml for git repo https://github.com/huangqian/rust-in-action written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/huangqian/rust-in-action already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+1a399c10897767c36d147199696c96f193034e49" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded croaring v0.4.1
[INFO] [stderr]   Downloaded croaring-sys v0.4.1
[INFO] [stderr]   Downloaded num-bigint v0.2.1
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "+1a399c10897767c36d147199696c96f193034e49" "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] 3187d0fa4dd48e1992ae4ef298125f22efb0f266ca2158a6774ed3f8d49b2221
[INFO] running `"docker" "start" "-a" "3187d0fa4dd48e1992ae4ef298125f22efb0f266ca2158a6774ed3f8d49b2221"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling cc v1.0.48
[INFO] [stderr]    Compiling cfg-if v0.1.5
[INFO] [stderr]     Checking void v1.0.2
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[INFO] [stderr]    Compiling croaring-sys v0.4.1
[INFO] [stderr]     Checking croaring v0.4.1
[INFO] [stderr]     Checking rust-in-action v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] error[E0601]: `main` function not found in crate `box`
[INFO] [stderr]   --> examples/box.rs:1:1
[INFO] [stderr]    |
[INFO] [stderr] 1  | / #[cfg(test)]
[INFO] [stderr] 2  | | mod box_test {
[INFO] [stderr] 3  | |     use box_test::List::{Cons, Nil};
[INFO] [stderr] 4  | |     use MyBox;
[INFO] [stderr] ...  |
[INFO] [stderr] 60 | |     }
[INFO] [stderr] 61 | | }
[INFO] [stderr]    | |_^ consider adding a `main` function to `examples/box.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-in-action`.
[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: enum is never used: `IpAddrKind`
[INFO] [stderr]  --> examples/enums.rs:7:6
[INFO] [stderr]   |
[INFO] [stderr] 7 | enum IpAddrKind{
[INFO] [stderr]   |      ^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused `#[macro_use]` import
[INFO] [stderr]  --> examples/mysql.rs:2:1
[INFO] [stderr]   |
[INFO] [stderr] 2 | #[macro_use]
[INFO] [stderr]   | ^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused imports: `OptsBuilder`, `Opts`, `Pool`, `Value`, `from_value`
[INFO] [stderr]  --> examples/mysql.rs:5:13
[INFO] [stderr]   |
[INFO] [stderr] 5 | use mysql::{from_value, Opts, OptsBuilder, Pool, Value};
[INFO] [stderr]   |             ^^^^^^^^^^  ^^^^  ^^^^^^^^^^^  ^^^^  ^^^^^
[INFO] [stderr] 
[INFO] [stderr] error[E0601]: `main` function not found in crate `mysql`
[INFO] [stderr]   --> examples/mysql.rs:1:1
[INFO] [stderr]    |
[INFO] [stderr] 1  | / extern crate core;
[INFO] [stderr] 2  | | #[macro_use]
[INFO] [stderr] 3  | | extern crate mysql;
[INFO] [stderr] 4  | |
[INFO] [stderr] ...  |
[INFO] [stderr] 87 | |     }
[INFO] [stderr] 88 | | }
[INFO] [stderr]    | |_^ consider adding a `main` function to `examples/mysql.rs`
[INFO] [stderr] 
[INFO] [stderr] error: aborting due to previous error; 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] For more information about this error, try `rustc --explain E0601`.
[INFO] [stderr] warning: unused variable: `f2`
[INFO] [stderr]   --> examples/copy.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let f2 = f1;
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_f2`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]   --> examples/function-pointer.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let a  = 2;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `b`
[INFO] [stderr]   --> examples/function-pointer.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let b  = 3;
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `while_case`
[INFO] [stderr]   --> examples/loop.rs:11:4
[INFO] [stderr]    |
[INFO] [stderr] 11 | fn while_case(){
[INFO] [stderr]    |    ^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: function is never used: `while_demo_2`
[INFO] [stderr]   --> examples/loop.rs:20:4
[INFO] [stderr]    |
[INFO] [stderr] 20 | fn while_demo_2(){
[INFO] [stderr]    |    ^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] error: build failed
[INFO] running `"docker" "inspect" "3187d0fa4dd48e1992ae4ef298125f22efb0f266ca2158a6774ed3f8d49b2221"`
[INFO] running `"docker" "rm" "-f" "3187d0fa4dd48e1992ae4ef298125f22efb0f266ca2158a6774ed3f8d49b2221"`
[INFO] [stdout] 3187d0fa4dd48e1992ae4ef298125f22efb0f266ca2158a6774ed3f8d49b2221