[INFO] fetching crate lovm2_core 0.4.8...
[INFO] checking lovm2_core-0.4.8 against master#dc375db7d8df0aa450e622c529147c95eee756f5 for pr-156749
[INFO] extracting crate lovm2_core 0.4.8 into /workspace/builds/worker-2-tc1/source
[INFO] started tweaking crates.io crate lovm2_core 0.4.8
[INFO] finished tweaking crates.io crate lovm2_core 0.4.8
[INFO] tweaked toml for crates.io crate lovm2_core 0.4.8 written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate lovm2_core 0.4.8 on toolchain dc375db7d8df0aa450e622c529147c95eee756f5
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dc375db7d8df0aa450e622c529147c95eee756f5" "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" "+dc375db7d8df0aa450e622c529147c95eee756f5" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 37 packages to latest compatible versions
[INFO] [stderr]       Adding bincode v1.3.3 (available: v3.0.0)
[INFO] [stderr]       Adding dirs v3.0.2 (available: v6.0.0)
[INFO] [stderr]       Adding indexmap v1.9.3 (available: v2.14.0)
[INFO] [stderr]       Adding libloading v0.6.7 (available: v0.9.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dc375db7d8df0aa450e622c529147c95eee756f5" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded dirs v3.0.2
[INFO] [stderr]   Downloaded lovm2_module v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3e793bdf10248eb2ddbd6b0faebed8155c11b4589982e2893733958d93e8d540" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 539423d91d8a134af57e40035ee68e70c4e4e1e4e3bf1bd72327367b07c55ae6
[INFO] running `Command { std: "docker" "start" "539423d91d8a134af57e40035ee68e70c4e4e1e4e3bf1bd72327367b07c55ae6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "539423d91d8a134af57e40035ee68e70c4e4e1e4e3bf1bd72327367b07c55ae6" "/opt/rustwide/cargo-home/bin/cargo" "+dc375db7d8df0aa450e622c529147c95eee756f5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "539423d91d8a134af57e40035ee68e70c4e4e1e4e3bf1bd72327367b07c55ae6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-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" "-w" "/opt/rustwide/workdir" "--user" "0:0" "539423d91d8a134af57e40035ee68e70c4e4e1e4e3bf1bd72327367b07c55ae6" "/opt/rustwide/cargo-home/bin/cargo" "+dc375db7d8df0aa450e622c529147c95eee756f5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking rustc-demangle v0.1.27
[INFO] [stderr]     Checking hashbrown v0.12.3
[INFO] [stderr]    Compiling indexmap v1.9.3
[INFO] [stderr]     Checking addr2line v0.25.1
[INFO] [stderr]     Checking miniz_oxide v0.8.9
[INFO] [stderr]     Checking libloading v0.6.7
[INFO] [stderr]     Checking object v0.37.3
[INFO] [stderr]    Compiling syn v2.0.118
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]     Checking dirs-sys v0.3.7
[INFO] [stderr]     Checking dirs v3.0.2
[INFO] [stderr]    Compiling serde_derive v1.0.228
[INFO] [stderr]     Checking backtrace v0.3.76
[INFO] [stderr]    Compiling lovm2_module v0.1.0
[INFO] [stderr]     Checking serde v1.0.228
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking lovm2_core v0.4.8 (/opt/rustwide/workdir)
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/module/shared.rs:92:5
[INFO] [stdout]    |
[INFO] [stdout] 91 | pub struct SharedObjectSlot(
[INFO] [stdout]    |            ---------------- field in this struct
[INFO] [stdout] 92 |     Rc<Library>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 92 -     Rc<Library>,
[INFO] [stdout] 92 +     (),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> src/module/shared.rs:92:5
[INFO] [stdout]    |
[INFO] [stdout] 91 | pub struct SharedObjectSlot(
[INFO] [stdout]    |            ---------------- field in this struct
[INFO] [stdout] 92 |     Rc<Library>,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 92 -     Rc<Library>,
[INFO] [stdout] 92 +     (),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Result<(), error::Lovm2Error>`, which is not FFI-safe
[INFO] [stdout]   --> src/module/shared.rs:24:27
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub type ExternFunction = unsafe extern "C" fn(&mut Vm) -> Lovm2Result<()>;
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding a `#[repr(C)]`, `#[repr(transparent)]`, or integer `#[repr(...)]` attribute to this enum
[INFO] [stdout]    = note: enum has no representation hint
[INFO] [stdout]    = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Rc<libloading::Library>`, which is not FFI-safe
[INFO] [stdout]   --> src/module/shared.rs:26:30
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub type ExternInitializer = extern "C" fn(lib: Rc<Library>, &mut HashMap<Variable, CallableRef>);
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]    = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Result<(), error::Lovm2Error>`, which is not FFI-safe
[INFO] [stdout]   --> src/module/shared.rs:24:27
[INFO] [stdout]    |
[INFO] [stdout] 24 | pub type ExternFunction = unsafe extern "C" fn(&mut Vm) -> Lovm2Result<()>;
[INFO] [stdout]    |                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding a `#[repr(C)]`, `#[repr(transparent)]`, or integer `#[repr(...)]` attribute to this enum
[INFO] [stdout]    = note: enum has no representation hint
[INFO] [stdout]    = note: `#[warn(improper_ctypes_definitions)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` fn uses type `Rc<libloading::Library>`, which is not FFI-safe
[INFO] [stdout]   --> src/module/shared.rs:26:30
[INFO] [stdout]    |
[INFO] [stdout] 26 | pub type ExternInitializer = extern "C" fn(lib: Rc<Library>, &mut HashMap<Variable, CallableRef>);
[INFO] [stdout]    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not FFI-safe
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider adding a `#[repr(C)]` or `#[repr(transparent)]` attribute to this struct
[INFO] [stdout]    = note: this struct has unspecified layout
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.23s
[INFO] running `Command { std: "docker" "inspect" "539423d91d8a134af57e40035ee68e70c4e4e1e4e3bf1bd72327367b07c55ae6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "539423d91d8a134af57e40035ee68e70c4e4e1e4e3bf1bd72327367b07c55ae6", kill_on_drop: false }`
[INFO] [stdout] 539423d91d8a134af57e40035ee68e70c4e4e1e4e3bf1bd72327367b07c55ae6