[INFO] fetching crate rexl 0.0.3...
[INFO] testing rexl-0.0.3 against beta-2021-09-08 for beta-1.56-1
[INFO] extracting crate rexl 0.0.3 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate rexl 0.0.3 on toolchain beta-2021-09-08
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate rexl 0.0.3
[INFO] finished tweaking crates.io crate rexl 0.0.3
[INFO] tweaked toml for crates.io crate rexl 0.0.3 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-09-08" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a7d3246983b597a54599800ddd10a8813c96693640b81869903e5e282504d588
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "a7d3246983b597a54599800ddd10a8813c96693640b81869903e5e282504d588", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a7d3246983b597a54599800ddd10a8813c96693640b81869903e5e282504d588", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a7d3246983b597a54599800ddd10a8813c96693640b81869903e5e282504d588", kill_on_drop: false }`
[INFO] [stdout] a7d3246983b597a54599800ddd10a8813c96693640b81869903e5e282504d588
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6412c90c1becb5d51447c65bcce28a492a0f2a20eb15a94220663758ca6daf49
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "6412c90c1becb5d51447c65bcce28a492a0f2a20eb15a94220663758ca6daf49", kill_on_drop: false }`
[INFO] [stderr]    Compiling rexl v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/time/time_it.rs:88:17
[INFO] [stdout]    |
[INFO] [stdout] 88 |                 &mut ts.push(t);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 88 |                 let _ = &mut ts.push(t);
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.37s
[INFO] running `Command { std: "docker" "inspect" "6412c90c1becb5d51447c65bcce28a492a0f2a20eb15a94220663758ca6daf49", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6412c90c1becb5d51447c65bcce28a492a0f2a20eb15a94220663758ca6daf49", kill_on_drop: false }`
[INFO] [stdout] 6412c90c1becb5d51447c65bcce28a492a0f2a20eb15a94220663758ca6daf49
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen" "--no-run" "--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] 5570fb8711d06bec6da840f03ad8d30fd4230da41f898fd04a4283d527de3f5a
[INFO] running `Command { std: "docker" "start" "-a" "5570fb8711d06bec6da840f03ad8d30fd4230da41f898fd04a4283d527de3f5a", kill_on_drop: false }`
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/time/time_it.rs:88:17
[INFO] [stdout]    |
[INFO] [stdout] 88 |                 &mut ts.push(t);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 88 |                 let _ = &mut ts.push(t);
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rexl v0.0.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused borrow that must be used
[INFO] [stdout]   --> src/time/time_it.rs:88:17
[INFO] [stdout]    |
[INFO] [stdout] 88 |                 &mut ts.push(t);
[INFO] [stdout]    |                 ^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 88 |                 let _ = &mut ts.push(t);
[INFO] [stdout]    |                 +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 2.25s
[INFO] running `Command { std: "docker" "inspect" "5570fb8711d06bec6da840f03ad8d30fd4230da41f898fd04a4283d527de3f5a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5570fb8711d06bec6da840f03ad8d30fd4230da41f898fd04a4283d527de3f5a", kill_on_drop: false }`
[INFO] [stdout] 5570fb8711d06bec6da840f03ad8d30fd4230da41f898fd04a4283d527de3f5a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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=warn" "-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:a89201d6b5b9fd45c15d5952ece0a0129e7e80cb26ec023fd59cf09bc26f1604" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-09-08" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 9dac634ed6ddc78f0b2c2376c54499fb812689d6d97a647f5c562c84dd3894e7
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9dac634ed6ddc78f0b2c2376c54499fb812689d6d97a647f5c562c84dd3894e7", kill_on_drop: false }`
[INFO] [stderr] warning: unused borrow that must be used
[INFO] [stdout] 
[INFO] [stderr]   --> src/time/time_it.rs:88:17
[INFO] [stdout] running 0 tests
[INFO] [stderr]    |
[INFO] [stdout] 
[INFO] [stderr] 88 |                 &mut ts.push(t);
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr]    |                 ^^^^^^^^^^^^^^^ the borrow produces a value
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stderr] help: use `let _ = ...` to ignore the resulting value
[INFO] [stderr]    |
[INFO] [stderr] 88 |                 let _ = &mut ts.push(t);
[INFO] [stderr]    |                 +++++++
[INFO] [stderr] 
[INFO] [stderr] warning: `rexl` (lib) generated 1 warning
[INFO] [stderr] warning: `rexl` (lib test) generated 1 warning (1 duplicate)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rexl-e22a5f14a1a8ce17)
[INFO] [stderr]      Running tests/lib.rs (/opt/rustwide/target/debug/deps/lib-ba4e23f9bc4c1574)
[INFO] [stdout] 
[INFO] [stdout] running 9 tests
[INFO] [stdout] test time::time_it_test::test_time_it ... ignored
[INFO] [stdout] test cli::arg_parse_test::test_arg_parser ... ok
[INFO] [stdout] test sort::swap_test::test_swap ... ok
[INFO] [stdout] test sort::bubble_sort_test::test_bubble_sort ... ok
[INFO] [stdout] test interpolate::dollar_test::test_dollar ... ok
[INFO] [stdout] test interpolate::brace_test::test_brace ... ok
[INFO] [stdout] test interpolate::dollar_test::test_dollar_named ... ok
[INFO] [stdout] test it_works ... ok
[INFO] [stdout] test interpolate::brace_test::test_brace_named ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 8 passed; 0 failed; 1 ignored; 0 measured; 0 filtered out; finished in 0.04s
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests rexl
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9dac634ed6ddc78f0b2c2376c54499fb812689d6d97a647f5c562c84dd3894e7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9dac634ed6ddc78f0b2c2376c54499fb812689d6d97a647f5c562c84dd3894e7", kill_on_drop: false }`
[INFO] [stdout] 9dac634ed6ddc78f0b2c2376c54499fb812689d6d97a647f5c562c84dd3894e7