[INFO] updating cached repository https://github.com/ZiCog/loop_blocking
[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] [stderr] From https://github.com/ZiCog/loop_blocking
[INFO] [stderr]    5b08e06..e3a1e18  master     -> master
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] e3a1e18c81838077e1979f774268d901de236193
[INFO] checking ZiCog/loop_blocking against try#d7b51666469c792a8a3f40849607739bae1e705e for pr-71665
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FZiCog%2Floop_blocking" "/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/ZiCog/loop_blocking on toolchain d7b51666469c792a8a3f40849607739bae1e705e
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d7b51666469c792a8a3f40849607739bae1e705e" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/ZiCog/loop_blocking
[INFO] finished tweaking git repo https://github.com/ZiCog/loop_blocking
[INFO] tweaked toml for git repo https://github.com/ZiCog/loop_blocking written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/ZiCog/loop_blocking already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+d7b51666469c792a8a3f40849607739bae1e705e" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[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" "+d7b51666469c792a8a3f40849607739bae1e705e" "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] 72d84d81686a2e2f132fa7bcd3d5257dbb933ee9c6bdd9e3a89dd73251db63a9
[INFO] running `"docker" "start" "-a" "72d84d81686a2e2f132fa7bcd3d5257dbb933ee9c6bdd9e3a89dd73251db63a9"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]     Checking time v0.2.1
[INFO] [stderr]     Checking unchecked-index v0.2.2
[INFO] [stderr]     Checking loop_blocking v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]  --> src/rustc_output.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![register_tool(c2rust)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_attributes)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: crate-level attribute should be in the root module
[INFO] [stderr]  --> src/rustc_output.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![register_tool(c2rust)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]  --> src/rustc_output.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(main, register_tool)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: crate-level attribute should be in the root module
[INFO] [stderr]  --> src/rustc_output.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(main, register_tool)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]  --> src/rustc_output.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![register_tool(c2rust)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_attributes)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: crate-level attribute should be in the root module
[INFO] [stderr]  --> src/rustc_output.rs:3:1
[INFO] [stderr]   |
[INFO] [stderr] 3 | #![register_tool(c2rust)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused attribute
[INFO] [stderr]  --> src/rustc_output.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(main, register_tool)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: crate-level attribute should be in the root module
[INFO] [stderr]  --> src/rustc_output.rs:4:1
[INFO] [stderr]   |
[INFO] [stderr] 4 | #![feature(main, register_tool)]
[INFO] [stderr]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr] warning: 4 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.48s
[INFO] running `"docker" "inspect" "72d84d81686a2e2f132fa7bcd3d5257dbb933ee9c6bdd9e3a89dd73251db63a9"`
[INFO] running `"docker" "rm" "-f" "72d84d81686a2e2f132fa7bcd3d5257dbb933ee9c6bdd9e3a89dd73251db63a9"`
[INFO] [stdout] 72d84d81686a2e2f132fa7bcd3d5257dbb933ee9c6bdd9e3a89dd73251db63a9