[INFO] updating cached repository https://github.com/sinesc/itsy
[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] dce20857a5a2d2eb3a294f08ae115de4bdb8194c
[INFO] checking sinesc/itsy against master#bd0bacc694d7d8175804bb6f690cb846bfa4a9ee for pr-71665
[INFO] running `"git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsinesc%2Fitsy" "/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/sinesc/itsy on toolchain bd0bacc694d7d8175804bb6f690cb846bfa4a9ee
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started tweaking git repo https://github.com/sinesc/itsy
[INFO] finished tweaking git repo https://github.com/sinesc/itsy
[INFO] tweaked toml for git repo https://github.com/sinesc/itsy written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/sinesc/itsy already has a lockfile, it will not be regenerated
[INFO] running `"/workspace/cargo-home/bin/cargo" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "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" "+bd0bacc694d7d8175804bb6f690cb846bfa4a9ee" "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] 84a57fa5be2cf68855e297634b27e1308aa8e6bab98b72b2774068b6b56c1fdb
[INFO] running `"docker" "start" "-a" "84a57fa5be2cf68855e297634b27e1308aa8e6bab98b72b2774068b6b56c1fdb"`
[INFO] [stderr] sudo: setrlimit(RLIMIT_CORE): Operation not permitted
[INFO] [stderr]    Compiling memchr v2.2.0
[INFO] [stderr]    Compiling nom v4.2.3
[INFO] [stderr]     Checking itsy v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]    --> src/util/types.rs:249:25
[INFO] [stderr]     |
[INFO] [stderr] 249 |             Type::Array(a)      => false, // FIXME just testing ref array
[INFO] [stderr]     |                         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]    --> src/util/types.rs:249:25
[INFO] [stderr]     |
[INFO] [stderr] 249 |             Type::Array(a)      => false, // FIXME just testing ref array
[INFO] [stderr]     |                         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `RuntimeError`
[INFO] [stderr]   --> src/runtime/vm.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     RuntimeError,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ArrayRef`
[INFO] [stderr]    --> src/util/types.rs:342:5
[INFO] [stderr]     |
[INFO] [stderr] 342 |     ArrayRef,       // 177 NYI
[INFO] [stderr]     |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `RuntimeError`
[INFO] [stderr]   --> src/runtime/vm.rs:14:5
[INFO] [stderr]    |
[INFO] [stderr] 14 |     RuntimeError,
[INFO] [stderr]    |     ^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variant is never constructed: `ArrayRef`
[INFO] [stderr]    --> src/util/types.rs:342:5
[INFO] [stderr]     |
[INFO] [stderr] 342 |     ArrayRef,       // 177 NYI
[INFO] [stderr]     |     ^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]   --> src/runtime/heap.rs:91:13
[INFO] [stderr]    |
[INFO] [stderr] 91 |             ::std::mem::replace(&mut self.objects[*v as usize], HeapObject::new());
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stderr] 
[INFO] [stderr] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stderr]   --> src/runtime/heap.rs:91:13
[INFO] [stderr]    |
[INFO] [stderr] 91 |             ::std::mem::replace(&mut self.objects[*v as usize], HeapObject::new());
[INFO] [stderr]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr]    = note: if you don't need the old value, you can just assign the new value directly
[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 16.13s
[INFO] running `"docker" "inspect" "84a57fa5be2cf68855e297634b27e1308aa8e6bab98b72b2774068b6b56c1fdb"`
[INFO] running `"docker" "rm" "-f" "84a57fa5be2cf68855e297634b27e1308aa8e6bab98b72b2774068b6b56c1fdb"`
[INFO] [stdout] 84a57fa5be2cf68855e297634b27e1308aa8e6bab98b72b2774068b6b56c1fdb