[INFO] fetching crate rust-timeit 0.3.0...
[INFO] checking rust-timeit-0.3.0 against try#7014e13d5becc920d4bea3cd87942c8a13d359bf+rustflags=-Dtail_expr_drop_order for pr-129864
[INFO] extracting crate rust-timeit 0.3.0 into /workspace/builds/worker-5-tc2/source
[INFO] validating manifest of crates.io crate rust-timeit 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 rust-timeit 0.3.0
[INFO] finished tweaking crates.io crate rust-timeit 0.3.0
[INFO] tweaked toml for crates.io crate rust-timeit 0.3.0 written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] crate crates.io crate rust-timeit 0.3.0 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" "+7014e13d5becc920d4bea3cd87942c8a13d359bf" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] ca163aabac91897a99a78ae5283c27e9d569c26e9dc1bb5274ba9f6983f1dc9f
[INFO] running `Command { std: "docker" "start" "-a" "ca163aabac91897a99a78ae5283c27e9d569c26e9dc1bb5274ba9f6983f1dc9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ca163aabac91897a99a78ae5283c27e9d569c26e9dc1bb5274ba9f6983f1dc9f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca163aabac91897a99a78ae5283c27e9d569c26e9dc1bb5274ba9f6983f1dc9f", kill_on_drop: false }`
[INFO] [stdout] ca163aabac91897a99a78ae5283c27e9d569c26e9dc1bb5274ba9f6983f1dc9f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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] 5cc6d81fc1c48a97143691aff60dcf2c66c2ad8fbbd7d4137d3dbd3cdac329b8
[INFO] running `Command { std: "docker" "start" "-a" "5cc6d81fc1c48a97143691aff60dcf2c66c2ad8fbbd7d4137d3dbd3cdac329b8", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.24
[INFO] [stderr]    Compiling unicode-xid v0.2.1
[INFO] [stderr]    Compiling syn v1.0.58
[INFO] [stderr]    Compiling libc v0.2.82
[INFO] [stderr]    Compiling unicode-segmentation v1.7.1
[INFO] [stderr]    Compiling argh_shared v0.1.4
[INFO] [stderr]    Compiling heck v0.3.2
[INFO] [stderr]    Compiling quote v1.0.8
[INFO] [stderr]     Checking dirs-sys v0.3.5
[INFO] [stderr]     Checking dirs v3.0.1
[INFO] [stderr]    Compiling argh_derive v0.1.4
[INFO] [stderr]     Checking argh v0.1.4
[INFO] [stderr]     Checking rust-timeit v0.3.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: variant `Help` is never constructed
[INFO] [stdout]   --> src/main.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 25 |           enum PerfMode {
[INFO] [stdout]    |                -------- variant in this enum
[INFO] [stdout] 26 |               Help,
[INFO] [stdout]    |               ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 62 | / perf_mode! {
[INFO] [stdout] 63 | |     Cycles => "cycles",
[INFO] [stdout] 64 | |     Instructions => "instructions",
[INFO] [stdout] 65 | |     Branches => "branches",
[INFO] [stdout] ...  |
[INFO] [stdout] 70 | |     RefCycles => "ref-cycles",
[INFO] [stdout] 71 | | }
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PerfMode` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `perf_mode` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Help` is never constructed
[INFO] [stdout]   --> src/main.rs:26:13
[INFO] [stdout]    |
[INFO] [stdout] 25 |           enum PerfMode {
[INFO] [stdout]    |                -------- variant in this enum
[INFO] [stdout] 26 |               Help,
[INFO] [stdout]    |               ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 62 | / perf_mode! {
[INFO] [stdout] 63 | |     Cycles => "cycles",
[INFO] [stdout] 64 | |     Instructions => "instructions",
[INFO] [stdout] 65 | |     Branches => "branches",
[INFO] [stdout] ...  |
[INFO] [stdout] 70 | |     RefCycles => "ref-cycles",
[INFO] [stdout] 71 | | }
[INFO] [stdout]    | |_- in this macro invocation
[INFO] [stdout]    |
[INFO] [stdout]    = note: `PerfMode` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout]    = note: this warning originates in the macro `perf_mode` (in Nightly builds, run with -Z macro-backtrace for more info)
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.25s
[INFO] running `Command { std: "docker" "inspect" "5cc6d81fc1c48a97143691aff60dcf2c66c2ad8fbbd7d4137d3dbd3cdac329b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5cc6d81fc1c48a97143691aff60dcf2c66c2ad8fbbd7d4137d3dbd3cdac329b8", kill_on_drop: false }`
[INFO] [stdout] 5cc6d81fc1c48a97143691aff60dcf2c66c2ad8fbbd7d4137d3dbd3cdac329b8