[INFO] cloning repository https://github.com/imkiva/mahiro-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/imkiva/mahiro-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fimkiva%2Fmahiro-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fimkiva%2Fmahiro-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 32b3e0f55cc22274df9f6f8aa1b9fcaf02cc370e
[INFO] checking imkiva/mahiro-rs against try#93086cfebfccb79083c59d0d3b2052944bba643c for pr-146440-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fimkiva%2Fmahiro-rs" "/workspace/builds/worker-7-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/imkiva/mahiro-rs
[INFO] finished tweaking git repo https://github.com/imkiva/mahiro-rs
[INFO] tweaked toml for git repo https://github.com/imkiva/mahiro-rs written to /workspace/builds/worker-7-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/imkiva/mahiro-rs on toolchain 93086cfebfccb79083c59d0d3b2052944bba643c
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/imkiva/mahiro-rs already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] d7f2713d88920b2ae09cdc6e2c57ff613b4744a98f242f833a32c4a48bd55f5c
[INFO] running `Command { std: "docker" "start" "-a" "d7f2713d88920b2ae09cdc6e2c57ff613b4744a98f242f833a32c4a48bd55f5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d7f2713d88920b2ae09cdc6e2c57ff613b4744a98f242f833a32c4a48bd55f5c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7f2713d88920b2ae09cdc6e2c57ff613b4744a98f242f833a32c4a48bd55f5c", kill_on_drop: false }`
[INFO] [stdout] d7f2713d88920b2ae09cdc6e2c57ff613b4744a98f242f833a32c4a48bd55f5c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc2/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" "RUSTDOCFLAGS=--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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+93086cfebfccb79083c59d0d3b2052944bba643c" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9957822246f241cdba8721287c4fadba606acb98d8809119b5f5076e0cf8540f
[INFO] running `Command { std: "docker" "start" "-a" "9957822246f241cdba8721287c4fadba606acb98d8809119b5f5076e0cf8540f", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling libc v0.2.79
[INFO] [stderr]    Compiling syn v1.0.44
[INFO] [stderr]    Compiling lazy_static v1.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.116
[INFO] [stderr]    Compiling serde v1.0.116
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]    Compiling byte-tools v0.3.1
[INFO] [stderr]    Compiling regex-syntax v0.6.20
[INFO] [stderr]    Compiling hashbrown v0.9.1
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]    Compiling siphasher v0.3.3
[INFO] [stderr]    Compiling new_debug_unreachable v1.0.4
[INFO] [stderr]    Compiling thread_local v1.0.1
[INFO] [stderr]    Compiling block-padding v0.1.5
[INFO] [stderr]    Compiling strsim v0.9.3
[INFO] [stderr]    Compiling phf_shared v0.8.0
[INFO] [stderr]    Compiling fake-simd v0.1.2
[INFO] [stderr]    Compiling fixedbitset v0.2.0
[INFO] [stderr]    Compiling either v1.6.1
[INFO] [stderr]    Compiling bit-vec v0.6.2
[INFO] [stderr]    Compiling opaque-debug v0.2.3
[INFO] [stderr]    Compiling ena v0.14.0
[INFO] [stderr]    Compiling indexmap v1.6.0
[INFO] [stderr]    Compiling diff v0.1.12
[INFO] [stderr]    Compiling itertools v0.9.0
[INFO] [stderr]     Checking build_system v0.1.0 (/opt/rustwide/workdir/build_system)
[INFO] [stderr]     Checking vm v0.1.0 (/opt/rustwide/workdir/vm)
[INFO] [stderr]    Compiling bit-set v0.5.2
[INFO] [stderr]    Compiling aho-corasick v0.7.14
[INFO] [stdout] error: struct `Executor` is never constructed
[INFO] [stdout]   --> vm/src/vm.rs:14:12
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Executor<'a> {
[INFO] [stdout]    |            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `pub` struct has private fields, no public constructor, and is not otherwise reachable through the external API, so consider providing a public constructor or removing it
[INFO] [stdout]    = note: `#[deny(unused_unconstructable_pub_structs)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `stack`, `frame`, `caller_regs`, and `code` are never read
[INFO] [stdout]   --> vm/src/vm.rs:15:3
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub struct Executor<'a> {
[INFO] [stdout]    |            -------- fields in this struct
[INFO] [stdout] 15 |   stack: &'a Stack,
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout] 16 |   frame: &'a Frame,
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout] 17 |   caller_regs: &'a CallerRegisters,
[INFO] [stdout]    |   ^^^^^^^^^^^
[INFO] [stdout] 18 |   code: &'a Vec<Opcode>,
[INFO] [stdout]    |   ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Executor` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `stack`, `frame`, `caller_regs`, and `exception` are never read
[INFO] [stdout]   --> vm/src/vm.rs:23:3
[INFO] [stdout]    |
[INFO] [stdout] 22 | pub struct MahiroVM {
[INFO] [stdout]    |            -------- fields in this struct
[INFO] [stdout] 23 |   stack: Stack,
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout] 24 |   frame: VecDeque<Frame>,
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout] 25 |   caller_regs: CallerRegisters,
[INFO] [stdout]    |   ^^^^^^^^^^^
[INFO] [stdout] 26 |   exception: Option<Value>,
[INFO] [stdout]    |   ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `MahiroVM` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `push` and `pop` are never used
[INFO] [stdout]   --> vm/src/vm.rs:39:6
[INFO] [stdout]    |
[INFO] [stdout] 29 | impl MahiroVM {
[INFO] [stdout]    | ------------- methods in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 39 |   fn push(&mut self, v: Value) {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 43 |   fn pop(&mut self) -> Value {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `vm` (lib) due to 1 previous error; 3 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "9957822246f241cdba8721287c4fadba606acb98d8809119b5f5076e0cf8540f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9957822246f241cdba8721287c4fadba606acb98d8809119b5f5076e0cf8540f", kill_on_drop: false }`
[INFO] [stdout] 9957822246f241cdba8721287c4fadba606acb98d8809119b5f5076e0cf8540f
