[INFO] cloning repository https://github.com/EkardNT/marching-buffers
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/EkardNT/marching-buffers" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEkardNT%2Fmarching-buffers", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEkardNT%2Fmarching-buffers'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 7cb55839af0b34ec798ebc2836254d00c845d8f7
[INFO] testing EkardNT/marching-buffers against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEkardNT%2Fmarching-buffers" "/workspace/builds/worker-15/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-15/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/EkardNT/marching-buffers on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/EkardNT/marching-buffers
[INFO] finished tweaking git repo https://github.com/EkardNT/marching-buffers
[INFO] tweaked toml for git repo https://github.com/EkardNT/marching-buffers written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate git repo https://github.com/EkardNT/marching-buffers already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3bc9c0cc671d4eac8d257e2f19f118ddafbc0f444f98633ebb34b0dae83cb4fc
[INFO] running `Command { std: "docker" "start" "-a" "3bc9c0cc671d4eac8d257e2f19f118ddafbc0f444f98633ebb34b0dae83cb4fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3bc9c0cc671d4eac8d257e2f19f118ddafbc0f444f98633ebb34b0dae83cb4fc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3bc9c0cc671d4eac8d257e2f19f118ddafbc0f444f98633ebb34b0dae83cb4fc", kill_on_drop: false }`
[INFO] [stdout] 3bc9c0cc671d4eac8d257e2f19f118ddafbc0f444f98633ebb34b0dae83cb4fc
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2aa49fbf1faece0f4cdde6952bbf935f60831da4481ac790461888d85bf0f8ed
[INFO] running `Command { std: "docker" "start" "-a" "2aa49fbf1faece0f4cdde6952bbf935f60831da4481ac790461888d85bf0f8ed", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling marching-buffer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/lib.rs:255:13
[INFO] [stdout]     |
[INFO] [stdout] 255 | ...   &mut copy_buffer[..copied_this_round].copy_from_slice(&reader.access().as_slice()[bytes_copied .. (bytes_copied + copied_this_round)...
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 255 |             let _ = &mut copy_buffer[..copied_this_round].copy_from_slice(&reader.access().as_slice()[bytes_copied .. (bytes_copied + copied_this_round)]);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.73s
[INFO] running `Command { std: "docker" "inspect" "2aa49fbf1faece0f4cdde6952bbf935f60831da4481ac790461888d85bf0f8ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2aa49fbf1faece0f4cdde6952bbf935f60831da4481ac790461888d85bf0f8ed", kill_on_drop: false }`
[INFO] [stdout] 2aa49fbf1faece0f4cdde6952bbf935f60831da4481ac790461888d85bf0f8ed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f662f20b010ed199b3daa4b595fcbc2a3d7f7efc88b9d22023dd36814c327c49
[INFO] running `Command { std: "docker" "start" "-a" "f662f20b010ed199b3daa4b595fcbc2a3d7f7efc88b9d22023dd36814c327c49", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling marching-buffer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/lib.rs:255:13
[INFO] [stdout]     |
[INFO] [stdout] 255 | ...   &mut copy_buffer[..copied_this_round].copy_from_slice(&reader.access().as_slice()[bytes_copied .. (bytes_copied + copied_this_round)...
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 255 |             let _ = &mut copy_buffer[..copied_this_round].copy_from_slice(&reader.access().as_slice()[bytes_copied .. (bytes_copied + copied_this_round)]);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]    --> src/lib.rs:255:13
[INFO] [stdout]     |
[INFO] [stdout] 255 | ...   &mut copy_buffer[..copied_this_round].copy_from_slice(&reader.access().as_slice()[bytes_copied .. (bytes_copied + copied_this_round)...
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]     |
[INFO] [stdout] 255 |             let _ = &mut copy_buffer[..copied_this_round].copy_from_slice(&reader.access().as_slice()[bytes_copied .. (bytes_copied + copied_this_round)]);
[INFO] [stdout]     |             +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 16.79s
[INFO] [stderr]   Executable unittests src/lib.rs (/opt/rustwide/target/debug/deps/marching_buffer-9fcfa5249aa64cfb)
[INFO] running `Command { std: "docker" "inspect" "f662f20b010ed199b3daa4b595fcbc2a3d7f7efc88b9d22023dd36814c327c49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f662f20b010ed199b3daa4b595fcbc2a3d7f7efc88b9d22023dd36814c327c49", kill_on_drop: false }`
[INFO] [stdout] f662f20b010ed199b3daa4b595fcbc2a3d7f7efc88b9d22023dd36814c327c49
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 22a35e23cb2e1b7d6d25521b3a3823fc8219124ba806cdbd1f36c16b86aa6540
[INFO] running `Command { std: "docker" "start" "-a" "22a35e23cb2e1b7d6d25521b3a3823fc8219124ba806cdbd1f36c16b86aa6540", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stderr]    --> src/lib.rs:255:13
[INFO] [stderr]     |
[INFO] [stderr] 255 | ...   &mut copy_buffer[..copied_this_round].copy_from_slice(&reader.access().as_slice()[bytes_copied .. (bytes_copied + copied_this_round)...
[INFO] [stderr]     |       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]     |
[INFO] [stderr] 255 |             let _ = &mut copy_buffer[..copied_this_round].copy_from_slice(&reader.access().as_slice()[bytes_copied .. (bytes_copied + copied_this_round)]);
[INFO] [stderr]     |             +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `marching-buffer` (lib) generated 1 warning
[INFO] [stderr] warning: `marching-buffer` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.52s
[INFO] [stderr]      Running unittests src/lib.rs (/opt/rustwide/target/debug/deps/marching_buffer-9fcfa5249aa64cfb)
[INFO] [stdout] 
[INFO] [stdout] running 2 tests
[INFO] [stdout] test tests::basic_nesting_test ... ok
[INFO] [stdout] test tests::unfinished_writes_are_ignored ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests marching-buffer
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "22a35e23cb2e1b7d6d25521b3a3823fc8219124ba806cdbd1f36c16b86aa6540", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "22a35e23cb2e1b7d6d25521b3a3823fc8219124ba806cdbd1f36c16b86aa6540", kill_on_drop: false }`
[INFO] [stdout] 22a35e23cb2e1b7d6d25521b3a3823fc8219124ba806cdbd1f36c16b86aa6540