[INFO] cloning repository https://github.com/quantatic/rust-microbenchmarks
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/quantatic/rust-microbenchmarks" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquantatic%2Frust-microbenchmarks", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquantatic%2Frust-microbenchmarks'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] f7aca83a49e8181bc8a039912c8c22428d06ba8b
[INFO] checking quantatic/rust-microbenchmarks against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquantatic%2Frust-microbenchmarks" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/quantatic/rust-microbenchmarks on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/quantatic/rust-microbenchmarks
[INFO] finished tweaking git repo https://github.com/quantatic/rust-microbenchmarks
[INFO] tweaked toml for git repo https://github.com/quantatic/rust-microbenchmarks written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/quantatic/rust-microbenchmarks 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded syscalls v0.6.15
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b40389e8f4f4aab521654ef4e75f83ef819d46ad309afc840d0ef55f859a8ee6
[INFO] running `Command { std: "docker" "start" "-a" "b40389e8f4f4aab521654ef4e75f83ef819d46ad309afc840d0ef55f859a8ee6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b40389e8f4f4aab521654ef4e75f83ef819d46ad309afc840d0ef55f859a8ee6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b40389e8f4f4aab521654ef4e75f83ef819d46ad309afc840d0ef55f859a8ee6", kill_on_drop: false }`
[INFO] [stdout] b40389e8f4f4aab521654ef4e75f83ef819d46ad309afc840d0ef55f859a8ee6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 66cbb7f589805e900aa3df1c3f1340c06bb352fb57ebea4c2541f79eeb4c7d9d
[INFO] running `Command { std: "docker" "start" "-a" "66cbb7f589805e900aa3df1c3f1340c06bb352fb57ebea4c2541f79eeb4c7d9d", kill_on_drop: false }`
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[INFO] [stderr]    Compiling serde_derive v1.0.192
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[INFO] [stderr]     Checking instruction-benchmark v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::hint::black_box`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::hint::black_box;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.5.1
[INFO] [stdout] warning: unused import: `std::hint::black_box`
[INFO] [stdout]  --> src/main.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | use std::hint::black_box;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Instant`, `_mm_lfence`, `_mm_mfence`, `_mm_sfence`, and `thread::yield_now`
[INFO] [stdout]  --> benches/benchmark.rs:4:27
[INFO] [stdout]   |
[INFO] [stdout] 4 |         x86_64::{__cpuid, _mm_lfence, _mm_mfence, _mm_sfence},
[INFO] [stdout]   |                           ^^^^^^^^^^  ^^^^^^^^^^  ^^^^^^^^^^
[INFO] [stdout] 5 |     },
[INFO] [stdout] 6 |     thread::yield_now,
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 7 |     time::{Duration, Instant},
[INFO] [stdout]   |                      ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.24s
[INFO] running `Command { std: "docker" "inspect" "66cbb7f589805e900aa3df1c3f1340c06bb352fb57ebea4c2541f79eeb4c7d9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66cbb7f589805e900aa3df1c3f1340c06bb352fb57ebea4c2541f79eeb4c7d9d", kill_on_drop: false }`
[INFO] [stdout] 66cbb7f589805e900aa3df1c3f1340c06bb352fb57ebea4c2541f79eeb4c7d9d