[INFO] fetching crate rust_tcp_ipc 0.3.1...
[INFO] checking rust_tcp_ipc-0.3.1 against try#c387b04bf028733cd561d62128c8a5eee4bc1458+rustflags=-Dtail_expr_drop_order for pr-130930
[INFO] extracting crate rust_tcp_ipc 0.3.1 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate rust_tcp_ipc 0.3.1 on toolchain c387b04bf028733cd561d62128c8a5eee4bc1458
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rust_tcp_ipc 0.3.1
[INFO] finished tweaking crates.io crate rust_tcp_ipc 0.3.1
[INFO] tweaked toml for crates.io crate rust_tcp_ipc 0.3.1 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]      Locking 53 packages to latest compatible versions
[INFO] [stderr]       Adding arrayvec v0.5.2 (available: v0.7.6)
[INFO] [stderr]       Adding base64 v0.13.1 (available: v0.22.1)
[INFO] [stderr]       Adding blake2b_simd v0.5.11 (available: v1.0.2)
[INFO] [stderr]       Adding constant_time_eq v0.1.5 (available: v0.3.1)
[INFO] [stderr]       Adding dirs v1.0.5 (available: v5.0.1)
[INFO] [stderr]       Adding getrandom v0.1.16 (available: v0.2.15)
[INFO] [stderr]       Adding redox_syscall v0.1.57 (available: v0.5.6)
[INFO] [stderr]       Adding redox_users v0.3.5 (available: v0.4.6)
[INFO] [stderr]       Adding rust-argon2 v0.8.3 (available: v2.1.0)
[INFO] [stderr]       Adding simplelog v0.5.3 (available: v0.12.2)
[INFO] [stderr]       Adding term v0.5.2 (available: v1.0.0)
[INFO] [stderr]       Adding wasi v0.9.0+wasi-snapshot-preview1 (available: v0.13.2+wasi-0.2.1)
[INFO] [stderr]       Adding windows-core v0.52.0 (available: v0.58.0)
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] bc8f8a4a56c1d3b00ed362da0efb6ec8b2cc1640fa27652d2330dc5612f77acf
[INFO] running `Command { std: "docker" "start" "-a" "bc8f8a4a56c1d3b00ed362da0efb6ec8b2cc1640fa27652d2330dc5612f77acf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bc8f8a4a56c1d3b00ed362da0efb6ec8b2cc1640fa27652d2330dc5612f77acf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bc8f8a4a56c1d3b00ed362da0efb6ec8b2cc1640fa27652d2330dc5612f77acf", kill_on_drop: false }`
[INFO] [stdout] bc8f8a4a56c1d3b00ed362da0efb6ec8b2cc1640fa27652d2330dc5612f77acf
[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 -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@sha256:6252d7ea7fb8caaf7af6d800c5fb250a9cd862b9a7f9508afb3c54fa7fe1102e" "/opt/rustwide/cargo-home/bin/cargo" "+c387b04bf028733cd561d62128c8a5eee4bc1458" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 428914e5af4a42a7b628fc0351c9ca3bcb5de60dd7054f89805ea428ebeb4028
[INFO] running `Command { std: "docker" "start" "-a" "428914e5af4a42a7b628fc0351c9ca3bcb5de60dd7054f89805ea428ebeb4028", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.159
[INFO] [stderr]     Checking byteorder v1.5.0
[INFO] [stderr]     Checking log v0.4.22
[INFO] [stderr]     Checking chrono v0.4.38
[INFO] [stderr]     Checking rust_tcp_ipc v0.3.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `Working` is never constructed
[INFO] [stdout]   --> src/tests/example_protocol.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub enum BusyStatesExample {
[INFO] [stdout]    |          ----------------- variant in this enum
[INFO] [stdout] 10 |     Idle,
[INFO] [stdout] 11 |     Working,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `BusyStatesExample` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `speed_check_tcp_minimal` is never used
[INFO] [stdout]  --> src/tests/speed_comparison.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn speed_check_tcp_minimal() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking term v0.5.2
[INFO] [stderr]     Checking simplelog v0.5.3
[INFO] [stdout] warning: variant `Working` is never constructed
[INFO] [stdout]   --> src/tests/example_protocol.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 9  | pub enum BusyStatesExample {
[INFO] [stdout]    |          ----------------- variant in this enum
[INFO] [stdout] 10 |     Idle,
[INFO] [stdout] 11 |     Working,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `BusyStatesExample` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `speed_check_tcp_minimal` is never used
[INFO] [stdout]  --> src/tests/speed_comparison.rs:6:4
[INFO] [stdout]   |
[INFO] [stdout] 6 | fn speed_check_tcp_minimal() {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.59s
[INFO] running `Command { std: "docker" "inspect" "428914e5af4a42a7b628fc0351c9ca3bcb5de60dd7054f89805ea428ebeb4028", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "428914e5af4a42a7b628fc0351c9ca3bcb5de60dd7054f89805ea428ebeb4028", kill_on_drop: false }`
[INFO] [stdout] 428914e5af4a42a7b628fc0351c9ca3bcb5de60dd7054f89805ea428ebeb4028