[INFO] fetching crate vec-option 0.3.0...
[INFO] checking vec-option-0.3.0 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate vec-option 0.3.0 into /workspace/builds/worker-1-tc2/source
[INFO] validating manifest of crates.io crate vec-option 0.3.0 on toolchain 7014e13d5becc920d4bea3cd87942c8a13d359bf
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate vec-option 0.3.0
[INFO] finished tweaking crates.io crate vec-option 0.3.0
[INFO] tweaked toml for crates.io crate vec-option 0.3.0 written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "generate-lockfile" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 83e62c960f705a7d622d9d3b64e58c9e669ec8bc95b13d83b2b3d303c589d81d
[INFO] running `Command { std: "docker" "start" "-a" "83e62c960f705a7d622d9d3b64e58c9e669ec8bc95b13d83b2b3d303c589d81d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "83e62c960f705a7d622d9d3b64e58c9e669ec8bc95b13d83b2b3d303c589d81d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "83e62c960f705a7d622d9d3b64e58c9e669ec8bc95b13d83b2b3d303c589d81d", kill_on_drop: false }`
[INFO] [stdout] 83e62c960f705a7d622d9d3b64e58c9e669ec8bc95b13d83b2b3d303c589d81d
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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:ceb6ea022f8a89cebbe621bb4987e73a935bd40dfbb726f832cfff4742a5b95a" "/opt/rustwide/cargo-home/bin/cargo" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 00025128f963dee0c802f2efe2a0ff43dd9ac75ff23ee701e0ec66755fb49b3d
[INFO] running `Command { std: "docker" "start" "-a" "00025128f963dee0c802f2efe2a0ff43dd9ac75ff23ee701e0ec66755fb49b3d", kill_on_drop: false }`
[INFO] [stderr]     Checking vec-option v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: function `unreachable_unchecked` is never used
[INFO] [stdout]    --> src/lib.rs:149:11
[INFO] [stdout]     |
[INFO] [stdout] 149 | unsafe fn unreachable_unchecked() -> ! {
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `UnwrapUnchecked` is never used
[INFO] [stdout]    --> src/lib.rs:172:7
[INFO] [stdout]     |
[INFO] [stdout] 172 | trait UnwrapUnchecked {
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `CellExt` is never used
[INFO] [stdout]   --> src/bit_vec.rs:20:7
[INFO] [stdout]    |
[INFO] [stdout] 20 | trait CellExt<T: ?Sized> {
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `unreachable_unchecked` is never used
[INFO] [stdout]    --> src/lib.rs:149:11
[INFO] [stdout]     |
[INFO] [stdout] 149 | unsafe fn unreachable_unchecked() -> ! {
[INFO] [stdout]     |           ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `UnwrapUnchecked` is never used
[INFO] [stdout]    --> src/lib.rs:172:7
[INFO] [stdout]     |
[INFO] [stdout] 172 | trait UnwrapUnchecked {
[INFO] [stdout]     |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `CellExt` is never used
[INFO] [stdout]   --> src/bit_vec.rs:20:7
[INFO] [stdout]    |
[INFO] [stdout] 20 | trait CellExt<T: ?Sized> {
[INFO] [stdout]    |       ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.30s
[INFO] running `Command { std: "docker" "inspect" "00025128f963dee0c802f2efe2a0ff43dd9ac75ff23ee701e0ec66755fb49b3d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "00025128f963dee0c802f2efe2a0ff43dd9ac75ff23ee701e0ec66755fb49b3d", kill_on_drop: false }`
[INFO] [stdout] 00025128f963dee0c802f2efe2a0ff43dd9ac75ff23ee701e0ec66755fb49b3d