[INFO] fetching crate mechtron-host 0.3.14...
[INFO] checking mechtron-host-0.3.14 against try#0611f7de057c584b8771102fde7aed6c70c71d3b for pr-146440
[INFO] extracting crate mechtron-host 0.3.14 into /workspace/builds/worker-2-tc2/source
[INFO] started tweaking crates.io crate mechtron-host 0.3.14
[INFO] finished tweaking crates.io crate mechtron-host 0.3.14
[INFO] tweaked toml for crates.io crate mechtron-host 0.3.14 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of crates.io crate mechtron-host 0.3.14 on toolchain 0611f7de057c584b8771102fde7aed6c70c71d3b
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 282 packages to latest compatible versions
[INFO] [stderr]       Adding bincode v1.3.3 (available: v3.0.0)
[INFO] [stderr]       Adding oneshot v0.1.13 (available: v0.2.1)
[INFO] [stderr]       Adding wasmer v2.3.0 (available: v7.1.0)
[INFO] [stderr]       Adding wasmer-compiler-singlepass v2.3.0 (available: v7.1.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] de5fe456197d61bfe710bb4674601ae02d5688e25a9f511415820a5ba15e8858
[INFO] running `Command { std: "docker" "start" "-a" "de5fe456197d61bfe710bb4674601ae02d5688e25a9f511415820a5ba15e8858", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "de5fe456197d61bfe710bb4674601ae02d5688e25a9f511415820a5ba15e8858", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "de5fe456197d61bfe710bb4674601ae02d5688e25a9f511415820a5ba15e8858", kill_on_drop: false }`
[INFO] [stdout] de5fe456197d61bfe710bb4674601ae02d5688e25a9f511415820a5ba15e8858
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "+0611f7de057c584b8771102fde7aed6c70c71d3b" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f8291b316219ef1371ae0a60139f903d95ede1bdc91f261b5efc840db3207f91
[INFO] running `Command { std: "docker" "start" "-a" "f8291b316219ef1371ae0a60139f903d95ede1bdc91f261b5efc840db3207f91", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde_core v1.0.228
[INFO] [stderr]    Compiling serde v1.0.228
[INFO] [stderr]    Compiling ahash v0.7.8
[INFO] [stderr]     Checking stable_deref_trait v1.2.1
[INFO] [stderr]     Checking getrandom v0.2.17
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]    Compiling target-lexicon v0.12.16
[INFO] [stderr]    Compiling ptr_meta_derive v0.1.4
[INFO] [stderr]     Checking yoke v0.8.2
[INFO] [stderr]    Compiling rkyv v0.7.46
[INFO] [stderr]     Checking object v0.37.3
[INFO] [stderr]    Compiling enum-iterator-derive v0.7.0
[INFO] [stderr]    Compiling rkyv_derive v0.7.46
[INFO] [stderr]    Compiling loupe-derive v0.1.3
[INFO] [stderr]     Checking ptr_meta v0.1.4
[INFO] [stderr]     Checking zerovec v0.11.6
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]     Checking enum-iterator v0.7.0
[INFO] [stderr]     Checking wasmparser v0.83.0
[INFO] [stderr]     Checking scopeguard v1.2.0
[INFO] [stderr]     Checking zerotrie v0.2.4
[INFO] [stderr]    Compiling corosensei v0.1.4
[INFO] [stderr]    Compiling cranelift-codegen-shared v0.82.3
[INFO] [stderr]     Checking memmap2 v0.5.10
[INFO] [stderr]    Compiling cranelift-codegen-meta v0.82.3
[INFO] [stderr]     Checking fallible-iterator v0.2.0
[INFO] [stderr]     Checking either v1.16.0
[INFO] [stderr]     Checking tinystr v0.8.3
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[INFO] [stderr]    Compiling crc32fast v1.5.0
[INFO] [stderr]     Checking region v3.0.2
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[INFO] [stderr]     Checking cranelift-entity v0.82.3
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[INFO] [stderr]     Checking icu_provider v2.2.0
[INFO] [stderr]    Compiling rustix v0.38.44
[INFO] [stderr]     Checking icu_normalizer v2.2.0
[INFO] [stderr]     Checking icu_properties v2.2.0
[INFO] [stderr]     Checking parking_lot_core v0.9.12
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[INFO] [stderr]     Checking idna_adapter v1.2.2
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[INFO] [stderr]    Compiling cranelift-codegen v0.82.3
[INFO] [stderr]     Checking wasm-encoder v0.250.0
[INFO] [stderr]     Checking backtrace v0.3.76
[INFO] [stderr]     Checking regex-automata v0.4.14
[INFO] [stderr]     Checking tracing v0.1.44
[INFO] [stderr]    Compiling num-integer v0.1.46
[INFO] [stderr]     Checking rayon v1.12.0
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[INFO] [stderr]    Compiling wasmer-compiler-cranelift v2.3.0
[INFO] [stderr]     Checking bytecount v0.6.9
[INFO] [stderr]     Checking joinery v2.1.0
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[INFO] [stderr]     Checking object v0.28.4
[INFO] [stderr]     Checking matches v0.1.10
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[INFO] [stderr]     Checking leb128 v0.2.6
[INFO] [stderr]     Checking wast v250.0.0
[INFO] [stderr]    Compiling dynasm v1.2.3
[INFO] [stderr]     Checking wasmer-types v2.3.0
[INFO] [stderr]     Checking which v4.4.2
[INFO] [stderr]     Checking nom-supreme v0.6.0
[INFO] [stderr]     Checking regex v1.12.3
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[INFO] [stderr]     Checking nom_locate v4.2.0
[INFO] [stderr]    Compiling num-bigint v0.4.6
[INFO] [stderr]     Checking serde_json v1.0.150
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[INFO] [stderr]     Checking parking_lot v0.12.5
[INFO] [stderr]     Checking libloading v0.7.4
[INFO] [stderr]     Checking hashbrown v0.14.5
[INFO] [stderr]     Checking yansi v0.5.1
[INFO] [stderr]     Checking wasmer-compiler v2.3.0
[INFO] [stderr]     Checking tokio v1.52.3
[INFO] [stderr]     Checking validator v0.15.0
[INFO] [stderr]     Checking dashmap v5.5.3
[INFO] [stderr]     Checking ariadne v0.1.5
[INFO] [stderr]     Checking serde_urlencoded v0.7.1
[INFO] [stderr]    Compiling enum-ordinalize v3.1.15
[INFO] [stderr]    Compiling strum_macros v0.24.3
[INFO] [stderr]     Checking cosmic-nom v0.3.14
[INFO] [stderr]     Checking wasmer-artifact v2.3.0
[INFO] [stderr]     Checking wasmer-object v2.3.0
[INFO] [stderr]     Checking wasmer-vm v2.3.0
[INFO] [stderr]     Checking wasmer-engine-universal-artifact v2.3.0
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking semver v1.0.28
[INFO] [stderr]     Checking wasmer-engine v2.3.0
[INFO] [stderr]    Compiling wasmer-derive v2.3.0
[INFO] [stderr]     Checking wasmer-engine-dylib v2.3.0
[INFO] [stderr]     Checking wasmer-engine-universal v2.3.0
[INFO] [stderr]    Compiling cosmic-macros-primitive v0.3.14
[INFO] [stderr]     Checking strum v0.24.1
[INFO] [stderr]     Checking convert_case v0.5.0
[INFO] [stderr]     Checking chrono v0.4.44
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]     Checking uuid v1.23.1
[INFO] [stderr]     Checking oneshot v0.1.13
[INFO] [stderr]     Checking wat v1.250.0
[INFO] [stderr]     Checking cosmic-space v0.3.14
[INFO] [stderr]     Checking dynasmrt v1.2.3
[INFO] [stderr]     Checking wasmer-compiler-singlepass v2.3.0
[INFO] [stderr]     Checking cranelift-frontend v0.82.3
[INFO] [stderr]     Checking wasmer v2.3.0
[INFO] [stderr]     Checking mechtron-host v0.3.14 (/opt/rustwide/workdir)
[INFO] [stdout] error: struct `WasmHostSkel` is never constructed
[INFO] [stdout]    --> src/lib.rs:184:12
[INFO] [stdout]     |
[INFO] [stdout] 184 | pub struct WasmHostSkel {
[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_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mechtron-host` (lib) due to 1 previous error
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] error: struct `WasmHostSkel` is never constructed
[INFO] [stdout]    --> src/lib.rs:184:12
[INFO] [stdout]     |
[INFO] [stdout] 184 | pub struct WasmHostSkel {
[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_struct)]` (part of `#[deny(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `mechtron-host` (lib test) due to 1 previous error
[INFO] running `Command { std: "docker" "inspect" "f8291b316219ef1371ae0a60139f903d95ede1bdc91f261b5efc840db3207f91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f8291b316219ef1371ae0a60139f903d95ede1bdc91f261b5efc840db3207f91", kill_on_drop: false }`
[INFO] [stdout] f8291b316219ef1371ae0a60139f903d95ede1bdc91f261b5efc840db3207f91
