[INFO] fetching crate rust-timeit 0.3.0...
[INFO] building rust-timeit-0.3.0 against master#c7f6aa2869acdbf014d094c6e427e554e160b6db for pr-146237-2
[INFO] extracting crate rust-timeit 0.3.0 into /workspace/builds/worker-3-tc1/source
[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-3-tc1/source/Cargo.toml
[INFO] validating manifest of crates.io crate rust-timeit 0.3.0 on toolchain c7f6aa2869acdbf014d094c6e427e554e160b6db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded argh_shared v0.1.4
[INFO] [stderr]   Downloaded dirs-sys v0.3.5
[INFO] [stderr]   Downloaded argh_derive v0.1.4
[INFO] [stderr]   Downloaded dirs v3.0.1
[INFO] [stderr]   Downloaded argh v0.1.4
[INFO] [stderr]   Downloaded syn v1.0.58
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 692ce2fece272d48ad3b855409903e1e61ec6247d7f75690480fbdd7503f0c32
[INFO] running `Command { std: "docker" "start" "-a" "692ce2fece272d48ad3b855409903e1e61ec6247d7f75690480fbdd7503f0c32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "692ce2fece272d48ad3b855409903e1e61ec6247d7f75690480fbdd7503f0c32", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "692ce2fece272d48ad3b855409903e1e61ec6247d7f75690480fbdd7503f0c32", kill_on_drop: false }`
[INFO] [stdout] 692ce2fece272d48ad3b855409903e1e61ec6247d7f75690480fbdd7503f0c32
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 70224d6ecc824c7e81713e184116f9d718c56662808c819ba52582ee8384b987
[INFO] running `Command { std: "docker" "start" "-a" "70224d6ecc824c7e81713e184116f9d718c56662808c819ba52582ee8384b987", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.58
[INFO] [stderr]    Compiling libc v0.2.82
[INFO] [stderr]    Compiling quote v1.0.8
[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 dirs-sys v0.3.5
[INFO] [stderr]    Compiling dirs v3.0.1
[INFO] [stderr]    Compiling argh_derive v0.1.4
[INFO] [stderr]    Compiling argh v0.1.4
[INFO] [stderr]    Compiling 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)]` (part of `#[warn(unused)]`) 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] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 5.98s
[INFO] running `Command { std: "docker" "inspect" "70224d6ecc824c7e81713e184116f9d718c56662808c819ba52582ee8384b987", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70224d6ecc824c7e81713e184116f9d718c56662808c819ba52582ee8384b987", kill_on_drop: false }`
[INFO] [stdout] 70224d6ecc824c7e81713e184116f9d718c56662808c819ba52582ee8384b987
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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" "-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:e90291280db7d1fac5b66fc6dad9f9662629e7365a55743daf9bdf73ebc4ea79" "/opt/rustwide/cargo-home/bin/cargo" "+c7f6aa2869acdbf014d094c6e427e554e160b6db" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cc35d589b9b8172e3066f55a236a8214143f382fbfac52be1538be5c2cf4c225
[INFO] running `Command { std: "docker" "start" "-a" "cc35d589b9b8172e3066f55a236a8214143f382fbfac52be1538be5c2cf4c225", kill_on_drop: false }`
[INFO] [stderr]    Compiling 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)]` (part of `#[warn(unused)]`) 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] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.75s
[INFO] running `Command { std: "docker" "inspect" "cc35d589b9b8172e3066f55a236a8214143f382fbfac52be1538be5c2cf4c225", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cc35d589b9b8172e3066f55a236a8214143f382fbfac52be1538be5c2cf4c225", kill_on_drop: false }`
[INFO] [stdout] cc35d589b9b8172e3066f55a236a8214143f382fbfac52be1538be5c2cf4c225
