[INFO] updating cached repository https://github.com/GopherJ/how-to-inherit-emitter-in-rust
[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] bac9678261fd0bcfd4655d945efffed374cb7466
[INFO] checking GopherJ/how-to-inherit-emitter-in-rust against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FGopherJ%2Fhow-to-inherit-emitter-in-rust" "/workspace/builds/worker-2/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/GopherJ/how-to-inherit-emitter-in-rust on toolchain e4dba30b9b475d8750370c4dfb49b6541990904d
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/GopherJ/how-to-inherit-emitter-in-rust
[INFO] finished tweaking git repo https://github.com/GopherJ/how-to-inherit-emitter-in-rust
[INFO] tweaked toml for git repo https://github.com/GopherJ/how-to-inherit-emitter-in-rust written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/GopherJ/how-to-inherit-emitter-in-rust already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+e4dba30b9b475d8750370c4dfb49b6541990904d" "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] 19f5ebec63f5e3fd0041b0758399fa1ca4e9225f4e3f50a409b3f27738b66d85
[INFO] running `"docker" "start" "-a" "19f5ebec63f5e3fd0041b0758399fa1ca4e9225f4e3f50a409b3f27738b66d85"`
[INFO] [stderr]    Compiling proc-macro2 v1.0.8
[INFO] [stderr]    Compiling syn v1.0.14
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling hashbrown v0.6.3
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling const-random-macro v0.1.8
[INFO] [stderr]     Checking const-random v0.1.8
[INFO] [stderr]     Checking ahash v0.2.18
[INFO] [stderr]     Checking emitbrown v0.1.7
[INFO] [stderr]     Checking selfreference v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> src/main.rs:59:9
[INFO] [stderr]    |
[INFO] [stderr] 59 |     let t = Test::new();
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `t`
[INFO] [stderr]   --> src/main.rs:59:9
[INFO] [stderr]    |
[INFO] [stderr] 59 |     let t = Test::new();
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: method is never used: `i_am_mut_borrowing`
[INFO] [stderr]   --> src/main.rs:53:9
[INFO] [stderr]    |
[INFO] [stderr] 53 |         pub fn i_am_mut_borrowing(&mut self) -> &mut Self {
[INFO] [stderr]    |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.78s
[INFO] running `"docker" "inspect" "19f5ebec63f5e3fd0041b0758399fa1ca4e9225f4e3f50a409b3f27738b66d85"`
[INFO] running `"docker" "rm" "-f" "19f5ebec63f5e3fd0041b0758399fa1ca4e9225f4e3f50a409b3f27738b66d85"`
[INFO] [stdout] 19f5ebec63f5e3fd0041b0758399fa1ca4e9225f4e3f50a409b3f27738b66d85