[INFO] cloning repository https://github.com/Emerentius/drain_experiments
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Emerentius/drain_experiments" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEmerentius%2Fdrain_experiments", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEmerentius%2Fdrain_experiments'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5d693978cc0ae5cbb701145ae3d12f15e8ac80e7
[INFO] checking Emerentius/drain_experiments against master#3aedcf06b73fc36feeebca3d579e1d2a6c40acc5 for pr-65819
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FEmerentius%2Fdrain_experiments" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Emerentius/drain_experiments on toolchain 3aedcf06b73fc36feeebca3d579e1d2a6c40acc5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/Emerentius/drain_experiments
[INFO] finished tweaking git repo https://github.com/Emerentius/drain_experiments
[INFO] tweaked toml for git repo https://github.com/Emerentius/drain_experiments written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/Emerentius/drain_experiments already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 326f1bd227a62e6571cf696f5f4019ce13643fdf72755aec78d7a38175062152
[INFO] running `Command { std: "docker" "start" "-a" "326f1bd227a62e6571cf696f5f4019ce13643fdf72755aec78d7a38175062152", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "326f1bd227a62e6571cf696f5f4019ce13643fdf72755aec78d7a38175062152", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "326f1bd227a62e6571cf696f5f4019ce13643fdf72755aec78d7a38175062152", kill_on_drop: false }`
[INFO] [stdout] 326f1bd227a62e6571cf696f5f4019ce13643fdf72755aec78d7a38175062152
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:c46a2d1a26fb48b37929c74ca49dd9409f2375a0a3bdb8fe07617f3ffccaa889" "/opt/rustwide/cargo-home/bin/cargo" "+3aedcf06b73fc36feeebca3d579e1d2a6c40acc5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 58f075123c7cdd7b4a84f6259de5c14bf66447d4ac4c83c395ad43e6162e22e0
[INFO] running `Command { std: "docker" "start" "-a" "58f075123c7cdd7b4a84f6259de5c14bf66447d4ac4c83c395ad43e6162e22e0", kill_on_drop: false }`
[INFO] [stderr]     Checking try_drain v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Exhausting`, `IteratorExt`
[INFO] [stdout]   --> src/lib.rs:11:18
[INFO] [stdout]    |
[INFO] [stdout] 11 | use exhausting::{Exhausting, IteratorExt};
[INFO] [stdout]    |                  ^^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `StreamElement`
[INFO] [stdout]   --> src/lib.rs:14:44
[INFO] [stdout]    |
[INFO] [stdout] 14 | use drain_element_streaming::{StreamDrain, StreamElement};
[INFO] [stdout]    |                                            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `CursorIter`
[INFO] [stdout]   --> src/lib.rs:17:22
[INFO] [stdout]    |
[INFO] [stdout] 17 | use cursor::{Cursor, CursorIter};
[INFO] [stdout]    |                      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Exhausting`, `IteratorExt`
[INFO] [stdout]   --> src/lib.rs:11:18
[INFO] [stdout]    |
[INFO] [stdout] 11 | use exhausting::{Exhausting, IteratorExt};
[INFO] [stdout]    |                  ^^^^^^^^^^  ^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `StreamElement`
[INFO] [stdout]   --> src/lib.rs:14:44
[INFO] [stdout]    |
[INFO] [stdout] 14 | use drain_element_streaming::{StreamDrain, StreamElement};
[INFO] [stdout]    |                                            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `CursorIter`
[INFO] [stdout]   --> src/lib.rs:17:22
[INFO] [stdout]    |
[INFO] [stdout] 17 | use cursor::{Cursor, CursorIter};
[INFO] [stdout]    |                      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rg`
[INFO] [stdout]   --> src/lib.rs:58:24
[INFO] [stdout]    |
[INFO] [stdout] 58 |     pub fn range(self, rg: std::ops::Range<usize>) -> Self {
[INFO] [stdout]    |                        ^^ help: if this is intentional, prefix it with an underscore: `_rg`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `rg`
[INFO] [stdout]   --> src/lib.rs:58:24
[INFO] [stdout]    |
[INFO] [stdout] 58 |     pub fn range(self, rg: std::ops::Range<usize>) -> Self {
[INFO] [stdout]    |                        ^^ help: if this is intentional, prefix it with an underscore: `_rg`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `take`
[INFO] [stdout]    --> src/cursor.rs:225:8
[INFO] [stdout]     |
[INFO] [stdout] 225 |     fn take(self) -> T {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `take`
[INFO] [stdout]    --> src/cursor.rs:225:8
[INFO] [stdout]     |
[INFO] [stdout] 225 |     fn take(self) -> T {
[INFO] [stdout]     |        ^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.77s
[INFO] running `Command { std: "docker" "inspect" "58f075123c7cdd7b4a84f6259de5c14bf66447d4ac4c83c395ad43e6162e22e0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58f075123c7cdd7b4a84f6259de5c14bf66447d4ac4c83c395ad43e6162e22e0", kill_on_drop: false }`
[INFO] [stdout] 58f075123c7cdd7b4a84f6259de5c14bf66447d4ac4c83c395ad43e6162e22e0