[INFO] updating cached repository https://github.com/jmatta697/matta_bc
[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] 3ead6621c2c413d844175868839063592f32468c
[INFO] checking jmatta697/matta_bc against try#e4dba30b9b475d8750370c4dfb49b6541990904d for pr-71393
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjmatta697%2Fmatta_bc" "/workspace/builds/worker-7/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jmatta697/matta_bc 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/jmatta697/matta_bc
[INFO] finished tweaking git repo https://github.com/jmatta697/matta_bc
[INFO] tweaked toml for git repo https://github.com/jmatta697/matta_bc written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/jmatta697/matta_bc 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-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] a16daebf53c7dfac8f3e7ec98a390c5b661d2896bc2f7df167e22439e7f1e931
[INFO] running `"docker" "start" "-a" "a16daebf53c7dfac8f3e7ec98a390c5b661d2896bc2f7df167e22439e7f1e931"`
[INFO] [stderr]    Compiling regex v1.0.6
[INFO] [stderr]    Compiling memchr v2.1.1
[INFO] [stderr]     Checking regex-syntax v0.6.3
[INFO] [stderr]     Checking aho-corasick v0.6.9
[INFO] [stderr]     Checking matta_bc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: value assigned to `variable_value_str` is never read
[INFO] [stderr]    --> src/main.rs:424:9
[INFO] [stderr]     |
[INFO] [stderr] 424 |     let mut variable_value_str = String::new();
[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: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `variable_value_str` is never read
[INFO] [stderr]    --> src/main.rs:424:9
[INFO] [stderr]     |
[INFO] [stderr] 424 |     let mut variable_value_str = String::new();
[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: 1 warning emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 8.66s
[INFO] running `"docker" "inspect" "a16daebf53c7dfac8f3e7ec98a390c5b661d2896bc2f7df167e22439e7f1e931"`
[INFO] running `"docker" "rm" "-f" "a16daebf53c7dfac8f3e7ec98a390c5b661d2896bc2f7df167e22439e7f1e931"`
[INFO] [stdout] a16daebf53c7dfac8f3e7ec98a390c5b661d2896bc2f7df167e22439e7f1e931