[INFO] cloning repository https://github.com/Its-NEO/CanCov
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Its-NEO/CanCov" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIts-NEO%2FCanCov", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIts-NEO%2FCanCov'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e09e14bc21e6fd208adba75c703888379942be66
[INFO] checking Its-NEO/CanCov against try#fafe42c59556a4233f03dd0d900b575a9afeece8 for pr-143764
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FIts-NEO%2FCanCov" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Its-NEO/CanCov
[INFO] finished tweaking git repo https://github.com/Its-NEO/CanCov
[INFO] tweaked toml for git repo https://github.com/Its-NEO/CanCov written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Its-NEO/CanCov on toolchain fafe42c59556a4233f03dd0d900b575a9afeece8
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+fafe42c59556a4233f03dd0d900b575a9afeece8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Its-NEO/CanCov 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" "+fafe42c59556a4233f03dd0d900b575a9afeece8" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+fafe42c59556a4233f03dd0d900b575a9afeece8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f05dfc94bc98110b9ceae45f116f0a11ebe4662869e4c72dd746ba62bdeb489c
[INFO] running `Command { std: "docker" "start" "-a" "f05dfc94bc98110b9ceae45f116f0a11ebe4662869e4c72dd746ba62bdeb489c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f05dfc94bc98110b9ceae45f116f0a11ebe4662869e4c72dd746ba62bdeb489c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f05dfc94bc98110b9ceae45f116f0a11ebe4662869e4c72dd746ba62bdeb489c", kill_on_drop: false }`
[INFO] [stdout] f05dfc94bc98110b9ceae45f116f0a11ebe4662869e4c72dd746ba62bdeb489c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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" "-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+fafe42c59556a4233f03dd0d900b575a9afeece8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] b3807d038865329aa0265ba1c6f3cd8891aee14b5a1bd5ef33e581dd6fc2911e
[INFO] running `Command { std: "docker" "start" "-a" "b3807d038865329aa0265ba1c6f3cd8891aee14b5a1bd5ef33e581dd6fc2911e", kill_on_drop: false }`
[INFO] [stderr]     Checking cancov v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/main.rs:97:13
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn iter(&self) -> FDIter {
[INFO] [stdout]    |             ^^^^^     ------ the lifetime gets resolved as `'_`
[INFO] [stdout]    |             |
[INFO] [stdout]    |             this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn iter(&self) -> FDIter<'_> {
[INFO] [stdout]    |                             ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: lifetime flowing from input to output with different syntax can be confusing
[INFO] [stdout]   --> src/main.rs:97:13
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn iter(&self) -> FDIter {
[INFO] [stdout]    |             ^^^^^     ------ the lifetime gets resolved as `'_`
[INFO] [stdout]    |             |
[INFO] [stdout]    |             this lifetime flows to the output
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: one option is to remove the lifetime for references and use the anonymous lifetime for paths
[INFO] [stdout]    |
[INFO] [stdout] 97 |     fn iter(&self) -> FDIter<'_> {
[INFO] [stdout]    |                             ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] running `Command { std: "docker" "inspect" "b3807d038865329aa0265ba1c6f3cd8891aee14b5a1bd5ef33e581dd6fc2911e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b3807d038865329aa0265ba1c6f3cd8891aee14b5a1bd5ef33e581dd6fc2911e", kill_on_drop: false }`
[INFO] [stdout] b3807d038865329aa0265ba1c6f3cd8891aee14b5a1bd5ef33e581dd6fc2911e