[INFO] fetching crate substring 1.4.0...
[INFO] testing substring-1.4.0 against beta-2021-01-01 for beta-1.50-1
[INFO] extracting crate substring 1.4.0 into /workspace/builds/worker-8/source
[INFO] validating manifest of crates.io crate substring 1.4.0 on toolchain beta-2021-01-01
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate substring 1.4.0
[INFO] finished tweaking crates.io crate substring 1.4.0
[INFO] tweaked toml for crates.io crate substring 1.4.0 written to /workspace/builds/worker-8/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2021-01-01" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 085cfa93d1c292b693761e61cf15d523fe8b39330cd4dee9d3db8d8ce42ca442
[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" "085cfa93d1c292b693761e61cf15d523fe8b39330cd4dee9d3db8d8ce42ca442", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "085cfa93d1c292b693761e61cf15d523fe8b39330cd4dee9d3db8d8ce42ca442", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "085cfa93d1c292b693761e61cf15d523fe8b39330cd4dee9d3db8d8ce42ca442", kill_on_drop: false }`
[INFO] [stdout] 085cfa93d1c292b693761e61cf15d523fe8b39330cd4dee9d3db8d8ce42ca442
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "build" "--frozen" "--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] 9402f8e34df955c9eda352e05ef5c7788ea138d38bab6669efffd41f98af682f
[INFO] running `Command { std: "docker" "start" "-a" "9402f8e34df955c9eda352e05ef5c7788ea138d38bab6669efffd41f98af682f", kill_on_drop: false }`
[INFO] [stderr]    Compiling substring v1.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.37s
[INFO] running `Command { std: "docker" "inspect" "9402f8e34df955c9eda352e05ef5c7788ea138d38bab6669efffd41f98af682f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9402f8e34df955c9eda352e05ef5c7788ea138d38bab6669efffd41f98af682f", kill_on_drop: false }`
[INFO] [stdout] 9402f8e34df955c9eda352e05ef5c7788ea138d38bab6669efffd41f98af682f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f95df3fa5aca06786c03f4db0f6ea3fece0ade055fe437cef4088cb4998e8015
[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" "f95df3fa5aca06786c03f4db0f6ea3fece0ade055fe437cef4088cb4998e8015", kill_on_drop: false }`
[INFO] [stderr]    Compiling substring v1.4.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 1.13s
[INFO] running `Command { std: "docker" "inspect" "f95df3fa5aca06786c03f4db0f6ea3fece0ade055fe437cef4088cb4998e8015", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f95df3fa5aca06786c03f4db0f6ea3fece0ade055fe437cef4088cb4998e8015", kill_on_drop: false }`
[INFO] [stdout] f95df3fa5aca06786c03f4db0f6ea3fece0ade055fe437cef4088cb4998e8015
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-8/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" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2021-01-01" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] bf8d9ce63cf92dfc5c070e24ab4e130b0bd7fc765dc8578300f6e874a5a0fc91
[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" "bf8d9ce63cf92dfc5c070e24ab4e130b0bd7fc765dc8578300f6e874a5a0fc91", kill_on_drop: false }`
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.01s
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/rustwide/target/debug/deps/substring-20031ebe29dfb0ba
[INFO] [stdout] running 5 tests
[INFO] [stdout] test tests::test_multiple_byte_characters ... ok
[INFO] [stdout] test tests::test_substring ... ok
[INFO] [stdout] test tests::test_out_of_bounds ... ok
[INFO] [stderr]    Doc-tests substring
[INFO] [stdout] test tests::test_start_less_than_end ... ok
[INFO] [stdout] test tests::test_start_and_end_equal ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 5 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.02s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test src/lib.rs - (line 28) ... ok
[INFO] [stdout] test src/lib.rs - str::substring (line 75) ... ok
[INFO] [stdout] test src/lib.rs - (line 10) ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 1.36s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "bf8d9ce63cf92dfc5c070e24ab4e130b0bd7fc765dc8578300f6e874a5a0fc91", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bf8d9ce63cf92dfc5c070e24ab4e130b0bd7fc765dc8578300f6e874a5a0fc91", kill_on_drop: false }`
[INFO] [stdout] bf8d9ce63cf92dfc5c070e24ab4e130b0bd7fc765dc8578300f6e874a5a0fc91