[INFO] updating cached repository https://github.com/jonny7/rust-references
[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] 72a87e2425a865dafd9c7cdb507a3fd063ecd07f
[INFO] testing jonny7/rust-references against master#28742a1146f10a4f09369baad027a464acb7a766 for pr-71274
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjonny7%2Frust-references" "/workspace/builds/worker-6/source"`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jonny7/rust-references on toolchain 28742a1146f10a4f09369baad027a464acb7a766
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/jonny7/rust-references
[INFO] finished tweaking git repo https://github.com/jonny7/rust-references
[INFO] tweaked toml for git repo https://github.com/jonny7/rust-references written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/jonny7/rust-references already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+28742a1146f10a4f09369baad027a464acb7a766" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+28742a1146f10a4f09369baad027a464acb7a766" "build" "--frozen"`
[INFO] [stdout] 860b3ae6ab2d41bac9de10634c5bace91bc6166058f204a17df99438bc60ad46
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `"docker" "start" "-a" "860b3ae6ab2d41bac9de10634c5bace91bc6166058f204a17df99438bc60ad46"`
[INFO] [stderr]    Compiling references v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `r1`
[INFO] [stderr]   --> src/main.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let r1 = &mut t;
[INFO] [stderr]    |             ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `r2`
[INFO] [stderr]   --> src/main.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |     let r2 = &mut t;
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r2`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.89s
[INFO] running `"docker" "inspect" "860b3ae6ab2d41bac9de10634c5bace91bc6166058f204a17df99438bc60ad46"`
[INFO] running `"docker" "rm" "-f" "860b3ae6ab2d41bac9de10634c5bace91bc6166058f204a17df99438bc60ad46"`
[INFO] [stdout] 860b3ae6ab2d41bac9de10634c5bace91bc6166058f204a17df99438bc60ad46
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+28742a1146f10a4f09369baad027a464acb7a766" "test" "--frozen" "--no-run"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 226bc73a229bb2d46b8dbee244b123a27c49e31b54219a0aa723e7926845647f
[INFO] running `"docker" "start" "-a" "226bc73a229bb2d46b8dbee244b123a27c49e31b54219a0aa723e7926845647f"`
[INFO] [stderr]    Compiling references v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `r1`
[INFO] [stderr]   --> src/main.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let r1 = &mut t;
[INFO] [stderr]    |             ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `r2`
[INFO] [stderr]   --> src/main.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |     let r2 = &mut t;
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r2`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.92s
[INFO] running `"docker" "inspect" "226bc73a229bb2d46b8dbee244b123a27c49e31b54219a0aa723e7926845647f"`
[INFO] running `"docker" "rm" "-f" "226bc73a229bb2d46b8dbee244b123a27c49e31b54219a0aa723e7926845647f"`
[INFO] [stdout] 226bc73a229bb2d46b8dbee244b123a27c49e31b54219a0aa723e7926845647f
[INFO] running `"docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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" "+28742a1146f10a4f09369baad027a464acb7a766" "test" "--frozen"`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1317f405799f4d721531b9571af44ef9fa76b0dd50ae2ae233801a79cdf479fa
[INFO] running `"docker" "start" "-a" "1317f405799f4d721531b9571af44ef9fa76b0dd50ae2ae233801a79cdf479fa"`
[INFO] [stderr] warning: unused variable: `r1`
[INFO] [stderr]   --> src/main.rs:23:13
[INFO] [stderr]    |
[INFO] [stderr] 23 |         let r1 = &mut t;
[INFO] [stderr]    |             ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `r2`
[INFO] [stderr]   --> src/main.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |     let r2 = &mut t;
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r2`
[INFO] [stderr] 
[INFO] [stderr] warning: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.08s
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/references-a7c2a0a82a24280b
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "1317f405799f4d721531b9571af44ef9fa76b0dd50ae2ae233801a79cdf479fa"`
[INFO] running `"docker" "rm" "-f" "1317f405799f4d721531b9571af44ef9fa76b0dd50ae2ae233801a79cdf479fa"`
[INFO] [stdout] 1317f405799f4d721531b9571af44ef9fa76b0dd50ae2ae233801a79cdf479fa