[INFO] cloning repository https://github.com/undo-lang/vm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/undo-lang/vm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fundo-lang%2Fvm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fundo-lang%2Fvm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] afada7a9e34bbb2ed0512bb2a3646a00f606affb
[INFO] checking undo-lang/vm against try#cac44d9528e3bbbdaa1537d187bd489ccc5de18c for pr-91141
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fundo-lang%2Fvm" "/workspace/builds/worker-116/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-116/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/undo-lang/vm on toolchain cac44d9528e3bbbdaa1537d187bd489ccc5de18c
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/undo-lang/vm
[INFO] finished tweaking git repo https://github.com/undo-lang/vm
[INFO] tweaked toml for git repo https://github.com/undo-lang/vm written to /workspace/builds/worker-116/source/Cargo.toml
[INFO] crate git repo https://github.com/undo-lang/vm already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded serde_derive v1.0.100
[INFO] [stderr]   Downloaded serde v1.0.15
[INFO] [stderr]   Downloaded serde_json v1.0.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-116/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-116/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@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] da9971d56dd4fdc05b3ef7346416a827e647ea309a7359d0aa60a121413345f8
[INFO] running `Command { std: "docker" "start" "-a" "da9971d56dd4fdc05b3ef7346416a827e647ea309a7359d0aa60a121413345f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "da9971d56dd4fdc05b3ef7346416a827e647ea309a7359d0aa60a121413345f8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da9971d56dd4fdc05b3ef7346416a827e647ea309a7359d0aa60a121413345f8", kill_on_drop: false }`
[INFO] [stdout] da9971d56dd4fdc05b3ef7346416a827e647ea309a7359d0aa60a121413345f8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-116/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-116/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:5736fa189c1c60b01babf4b8b698fe57b6ecc41933a7ff2e0b8d7a221459412b" "/opt/rustwide/cargo-home/bin/cargo" "+cac44d9528e3bbbdaa1537d187bd489ccc5de18c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b880028c3f3d18b3e23a5ddbcf1aa910200b6b424bb76e0a49be100c6b006166
[INFO] running `Command { std: "docker" "start" "-a" "b880028c3f3d18b3e23a5ddbcf1aa910200b6b424bb76e0a49be100c6b006166", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.3
[INFO] [stderr]    Compiling syn v1.0.5
[INFO] [stderr]     Checking num-traits v0.1.40
[INFO] [stderr]     Checking dtoa v0.4.2
[INFO] [stderr]     Checking itoa v0.3.4
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]    Compiling serde_derive v1.0.100
[INFO] [stderr]     Checking serde v1.0.15
[INFO] [stderr]     Checking serde_json v1.0.3
[INFO] [stderr]     Checking undo-vm v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `local`
[INFO] [stdout]    --> src/vm.rs:109:9
[INFO] [stdout]     |
[INFO] [stdout] 109 |     for local in frame.locals {
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_local`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arena`
[INFO] [stdout]   --> src/vm.rs:95:24
[INFO] [stdout]    |
[INFO] [stdout] 95 | fn compact(mut gc: GC, arena: Vec<Value>, frames: VecDeque<Frame>, mut stack: Vec<Ptr>) -> Vec<Value> {
[INFO] [stdout]    |                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_arena`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `local`
[INFO] [stdout]    --> src/vm.rs:109:9
[INFO] [stdout]     |
[INFO] [stdout] 109 |     for local in frame.locals {
[INFO] [stdout]     |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_local`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arena`
[INFO] [stdout]   --> src/vm.rs:95:24
[INFO] [stdout]    |
[INFO] [stdout] 95 | fn compact(mut gc: GC, arena: Vec<Value>, frames: VecDeque<Frame>, mut stack: Vec<Ptr>) -> Vec<Value> {
[INFO] [stdout]    |                        ^^^^^ help: if this is intentional, prefix it with an underscore: `_arena`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ThwartPtr`
[INFO] [stdout]   --> src/vm.rs:65:3
[INFO] [stdout]    |
[INFO] [stdout] 65 |   ThwartPtr(usize),
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `compact`
[INFO] [stdout]   --> src/vm.rs:95:4
[INFO] [stdout]    |
[INFO] [stdout] 95 | fn compact(mut gc: GC, arena: Vec<Value>, frames: VecDeque<Frame>, mut stack: Vec<Ptr>) -> Vec<Value> {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set`
[INFO] [stdout]    --> src/vm.rs:129:6
[INFO] [stdout]     |
[INFO] [stdout] 129 |   fn set(&mut self, i: usize, v: Value) {
[INFO] [stdout]     |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `ThwartPtr`
[INFO] [stdout]   --> src/vm.rs:65:3
[INFO] [stdout]    |
[INFO] [stdout] 65 |   ThwartPtr(usize),
[INFO] [stdout]    |   ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `compact`
[INFO] [stdout]   --> src/vm.rs:95:4
[INFO] [stdout]    |
[INFO] [stdout] 95 | fn compact(mut gc: GC, arena: Vec<Value>, frames: VecDeque<Frame>, mut stack: Vec<Ptr>) -> Vec<Value> {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set`
[INFO] [stdout]    --> src/vm.rs:129:6
[INFO] [stdout]     |
[INFO] [stdout] 129 |   fn set(&mut self, i: usize, v: Value) {
[INFO] [stdout]     |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 52s
[INFO] running `Command { std: "docker" "inspect" "b880028c3f3d18b3e23a5ddbcf1aa910200b6b424bb76e0a49be100c6b006166", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b880028c3f3d18b3e23a5ddbcf1aa910200b6b424bb76e0a49be100c6b006166", kill_on_drop: false }`
[INFO] [stdout] b880028c3f3d18b3e23a5ddbcf1aa910200b6b424bb76e0a49be100c6b006166