[INFO] updating cached repository https://github.com/mblk/hello-world
[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] 660282ebe8723834261f79d1195e8ee1c2f59bd2
[INFO] checking mblk/hello-world against master#2748a9fd93dd1a00a4521f4f16de5befbf77f6cd for pr-62262-1
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmblk%2Fhello-world" "/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/mblk/hello-world on toolchain 2748a9fd93dd1a00a4521f4f16de5befbf77f6cd
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/mblk/hello-world
[INFO] finished tweaking git repo https://github.com/mblk/hello-world
[INFO] tweaked toml for git repo https://github.com/mblk/hello-world written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate git repo https://github.com/mblk/hello-world already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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" "+2748a9fd93dd1a00a4521f4f16de5befbf77f6cd" "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] 04521fa67d6c4cb46a2b4a508cf13bc2e1ba7fc757fbd09c836b2ba8ecbefcba
[INFO] running `"docker" "start" "-a" "04521fa67d6c4cb46a2b4a508cf13bc2e1ba7fc757fbd09c836b2ba8ecbefcba"`
[INFO] [stderr]     Checking hello_world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused import: `std::cmp`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::cmp;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused import: `std::cmp`
[INFO] [stderr]  --> src/main.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::cmp;
[INFO] [stderr]   |     ^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `t2` is never read
[INFO] [stderr]   --> src/main.rs:52:13
[INFO] [stderr]    |
[INFO] [stderr] 52 |     let mut t2: (i32,i32) = (333,444);
[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: `f`
[INFO] [stderr]   --> src/main.rs:96:13
[INFO] [stderr]    |
[INFO] [stderr] 96 |         let f = Foo { x: y }; // ---+ f goes into scope
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_f`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]    --> src/main.rs:104:9
[INFO] [stderr]     |
[INFO] [stderr] 104 |     let x: &'static i32 = &FOO; // reference to data section of binary
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str1`
[INFO] [stderr]    --> src/main.rs:105:9
[INFO] [stderr]     |
[INFO] [stderr] 105 |     let str1: &'static str = "qwiojdqoiwjd";
[INFO] [stderr]     |         ^^^^ help: consider prefixing with an underscore: `_str1`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `x`
[INFO] [stderr]    --> src/main.rs:110:5
[INFO] [stderr]     |
[INFO] [stderr] 110 |     x: &'a i32,
[INFO] [stderr]     |     ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `t2` is never read
[INFO] [stderr]   --> src/main.rs:52:13
[INFO] [stderr]    |
[INFO] [stderr] 52 |     let mut t2: (i32,i32) = (333,444);
[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: `f`
[INFO] [stderr]   --> src/main.rs:96:13
[INFO] [stderr]    |
[INFO] [stderr] 96 |         let f = Foo { x: y }; // ---+ f goes into scope
[INFO] [stderr]    |             ^ help: consider prefixing with an underscore: `_f`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]    --> src/main.rs:104:9
[INFO] [stderr]     |
[INFO] [stderr] 104 |     let x: &'static i32 = &FOO; // reference to data section of binary
[INFO] [stderr]     |         ^ help: consider prefixing with an underscore: `_x`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `str1`
[INFO] [stderr]    --> src/main.rs:105:9
[INFO] [stderr]     |
[INFO] [stderr] 105 |     let str1: &'static str = "qwiojdqoiwjd";
[INFO] [stderr]     |         ^^^^ help: consider prefixing with an underscore: `_str1`
[INFO] [stderr] 
[INFO] [stderr] warning: field is never used: `x`
[INFO] [stderr]    --> src/main.rs:110:5
[INFO] [stderr]     |
[INFO] [stderr] 110 |     x: &'a i32,
[INFO] [stderr]     |     ^^^^^^^^^^
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.92s
[INFO] running `"docker" "inspect" "04521fa67d6c4cb46a2b4a508cf13bc2e1ba7fc757fbd09c836b2ba8ecbefcba"`
[INFO] running `"docker" "rm" "-f" "04521fa67d6c4cb46a2b4a508cf13bc2e1ba7fc757fbd09c836b2ba8ecbefcba"`
[INFO] [stdout] 04521fa67d6c4cb46a2b4a508cf13bc2e1ba7fc757fbd09c836b2ba8ecbefcba