[INFO] cloning repository https://github.com/sinesc/itsy
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sinesc/itsy" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsinesc%2Fitsy", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsinesc%2Fitsy'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] dce20857a5a2d2eb3a294f08ae115de4bdb8194c
[INFO] checking sinesc/itsy against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsinesc%2Fitsy" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sinesc/itsy on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[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-4/source/Cargo.toml
[INFO] crate git repo https://github.com/sinesc/itsy already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] dab90df5828c8b3430d3ddaa28031f6b3ab52dfd7346b021ad481e4ae78aa56d
[INFO] running `Command { std: "docker" "start" "-a" "dab90df5828c8b3430d3ddaa28031f6b3ab52dfd7346b021ad481e4ae78aa56d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dab90df5828c8b3430d3ddaa28031f6b3ab52dfd7346b021ad481e4ae78aa56d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dab90df5828c8b3430d3ddaa28031f6b3ab52dfd7346b021ad481e4ae78aa56d", kill_on_drop: false }`
[INFO] [stdout] dab90df5828c8b3430d3ddaa28031f6b3ab52dfd7346b021ad481e4ae78aa56d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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=forbid" "-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" "rustops/crates-build-env@sha256:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ba2ece5835841318f2247fdb7ba8faf6d97d343d2bd381513c070133334cabde
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ba2ece5835841318f2247fdb7ba8faf6d97d343d2bd381513c070133334cabde", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.1.5
[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] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/util/types.rs:249:25
[INFO] [stdout]     |
[INFO] [stdout] 249 |             Type::Array(a)      => false, // FIXME just testing ref array
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]    --> src/util/types.rs:249:25
[INFO] [stdout]     |
[INFO] [stdout] 249 |             Type::Array(a)      => false, // FIXME just testing ref array
[INFO] [stdout]     |                         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RuntimeError`
[INFO] [stdout]   --> src/runtime/vm.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     RuntimeError,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ArrayRef`
[INFO] [stdout]    --> src/util/types.rs:342:5
[INFO] [stdout]     |
[INFO] [stdout] 342 |     ArrayRef,       // 177 NYI
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/runtime/heap.rs:91:13
[INFO] [stdout]    |
[INFO] [stdout] 91 |             ::std::mem::replace(&mut self.objects[*v as usize], HeapObject::new());
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `RuntimeError`
[INFO] [stdout]   --> src/runtime/vm.rs:14:5
[INFO] [stdout]    |
[INFO] [stdout] 14 |     RuntimeError,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ArrayRef`
[INFO] [stdout]    --> src/util/types.rs:342:5
[INFO] [stdout]     |
[INFO] [stdout] 342 |     ArrayRef,       // 177 NYI
[INFO] [stdout]     |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]   --> src/runtime/heap.rs:91:13
[INFO] [stdout]    |
[INFO] [stdout] 91 |             ::std::mem::replace(&mut self.objects[*v as usize], HeapObject::new());
[INFO] [stdout]    |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 14.21s
[INFO] running `Command { std: "docker" "inspect" "ba2ece5835841318f2247fdb7ba8faf6d97d343d2bd381513c070133334cabde", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ba2ece5835841318f2247fdb7ba8faf6d97d343d2bd381513c070133334cabde", kill_on_drop: false }`
[INFO] [stdout] ba2ece5835841318f2247fdb7ba8faf6d97d343d2bd381513c070133334cabde