[INFO] cloning repository https://github.com/PacktPublishing/Rust-Interop-with-Cpp
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/PacktPublishing/Rust-Interop-with-Cpp" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPacktPublishing%2FRust-Interop-with-Cpp", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPacktPublishing%2FRust-Interop-with-Cpp'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3e3f59d6a3c98b53786f628bd3e7e607c43f2333
[INFO] building PacktPublishing/Rust-Interop-with-Cpp against master#11663cd3bfefef7d34e8f0892c250bf698049392+rustflags=-Dtail-expr-drop-order for pr-134523
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FPacktPublishing%2FRust-Interop-with-Cpp" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/PacktPublishing/Rust-Interop-with-Cpp on toolchain 11663cd3bfefef7d34e8f0892c250bf698049392
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/PacktPublishing/Rust-Interop-with-Cpp
[INFO] finished tweaking git repo https://github.com/PacktPublishing/Rust-Interop-with-Cpp
[INFO] tweaked toml for git repo https://github.com/PacktPublishing/Rust-Interop-with-Cpp written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/PacktPublishing/Rust-Interop-with-Cpp 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" "+11663cd3bfefef7d34e8f0892c250bf698049392" "fetch" "--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-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bafb3d97868234a6d23bf94e58d8e092bae4a17bf8eeb73a08eedf97d69085b2
[INFO] running `Command { std: "docker" "start" "-a" "bafb3d97868234a6d23bf94e58d8e092bae4a17bf8eeb73a08eedf97d69085b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bafb3d97868234a6d23bf94e58d8e092bae4a17bf8eeb73a08eedf97d69085b2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bafb3d97868234a6d23bf94e58d8e092bae4a17bf8eeb73a08eedf97d69085b2", kill_on_drop: false }`
[INFO] [stdout] bafb3d97868234a6d23bf94e58d8e092bae4a17bf8eeb73a08eedf97d69085b2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 902e1bd91cf3a3787549e3ffc9bceaceccca1d5c53f076dc73f0351909680c8c
[INFO] running `Command { std: "docker" "start" "-a" "902e1bd91cf3a3787549e3ffc9bceaceccca1d5c53f076dc73f0351909680c8c", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.79
[INFO] [stderr]    Compiling rust-cpp-ffi v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `a`, `b`, and `c` are never read
[INFO] [stdout]   --> src/main.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 7  | struct RustStruct {
[INFO] [stdout]    |        ---------- fields in this struct
[INFO] [stdout] 8  |     a: i32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 9  |     b: f32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 10 |     c: [u8; 10],
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RustStruct` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `RustStruct`, which is not FFI-safe
[INFO] [stdout]  --> src/main.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 |     fn fillStruct(s:*mut RustStruct);
[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] note: the type is defined here
[INFO] [stdout]  --> src/main.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct RustStruct {
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   = note: `#[warn(improper_ctypes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.34s
[INFO] running `Command { std: "docker" "inspect" "902e1bd91cf3a3787549e3ffc9bceaceccca1d5c53f076dc73f0351909680c8c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "902e1bd91cf3a3787549e3ffc9bceaceccca1d5c53f076dc73f0351909680c8c", kill_on_drop: false }`
[INFO] [stdout] 902e1bd91cf3a3787549e3ffc9bceaceccca1d5c53f076dc73f0351909680c8c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/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 -Dtail-expr-drop-order" "-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+11663cd3bfefef7d34e8f0892c250bf698049392" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8a498af11f8c1f5246c4e107273d23ce315fad25af9ff1da509e884f2ec65698
[INFO] running `Command { std: "docker" "start" "-a" "8a498af11f8c1f5246c4e107273d23ce315fad25af9ff1da509e884f2ec65698", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust-cpp-ffi v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: fields `a`, `b`, and `c` are never read
[INFO] [stdout]   --> src/main.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 7  | struct RustStruct {
[INFO] [stdout]    |        ---------- fields in this struct
[INFO] [stdout] 8  |     a: i32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 9  |     b: f32,
[INFO] [stdout]    |     ^
[INFO] [stdout] 10 |     c: [u8; 10],
[INFO] [stdout]    |     ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RustStruct` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `extern` block uses type `RustStruct`, which is not FFI-safe
[INFO] [stdout]  --> src/main.rs:3:21
[INFO] [stdout]   |
[INFO] [stdout] 3 |     fn fillStruct(s:*mut RustStruct);
[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] note: the type is defined here
[INFO] [stdout]  --> src/main.rs:7:1
[INFO] [stdout]   |
[INFO] [stdout] 7 | struct RustStruct {
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   = note: `#[warn(improper_ctypes)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `Command { std: "docker" "inspect" "8a498af11f8c1f5246c4e107273d23ce315fad25af9ff1da509e884f2ec65698", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8a498af11f8c1f5246c4e107273d23ce315fad25af9ff1da509e884f2ec65698", kill_on_drop: false }`
[INFO] [stdout] 8a498af11f8c1f5246c4e107273d23ce315fad25af9ff1da509e884f2ec65698